DRAFT Curriculum Vitae

Robert G. M. Spencer

Last Revised: January 21, 2026

General Information

University address:	Earth, Ocean & Atmospheric Science
COLLEGE OF ARTS AND SCIENCES
EOA Building Rm 4015
Florida State University
Tallahassee, Florida 32306-4320
Phone: 8506450955

E-mail address:	rgspencer@fsu.edu

Web site:	http://www.spencerbiogeochem.org/

Professional Preparation

2006	Ph.D, University of Newcastle-upon-Tyne, U.K. Major: Biogeochemistry. 

2000	B.Sc (Hon's), University of Newcastle-upon-Tyne, U.K. Major: Marine Biology. 

Professional Experience

2021–present	Professor, EARTH, OCEAN & ATMOSPHERIC SCI, Florida State University. 

2017–2021	Associate Professor, EARTH, OCEAN & ATMOSPHERIC SCI, Florida State University. 

2010–2018	Guest Investigator, Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution. 

2014–2017	Assistant Professor, EARTH, OCEAN & ATMOSPHERIC SCI, Florida State University. 

2013–2014	Associate Scientist, Woods Hole Research Center. 

2010–2013	Assistant Scientist, Woods Hole Research Center. 

2013	Guest Lecturer, Arctic System Science, Clark University. 

2011–2012	Guest Lecturer, Woods Hole Oceanographic Institution graduate Geodynamics Program, Massachusetts Institute of Technology. 

2005–2012	Postgraduate and Undergraduate Tutor, University of California, Davis. Dissertation advisor to both postgraduate and undergraduate students undertaking projects focusing on organic matter characterization in soils, watersheds and estuaries.

2009–2010	Project Scientist, Department of Plant Sciences, University of California, Davis. 

2005–2009	Post-Doctoral Researcher, Department of Land, Air and Water Resources, University of California, Davis, U.S.A. 

2003–2005	Primary Instructor, University of Newcastle-upon-Tyne, U.K. Undergraduate classes and laboratories: Analytical Environmental Chemistry, Chemical Oceanography, Biogeochemistry, Global Biogeochemical Cycles, Aquatic Systems and Global Climate Change.

2003–2005	Undergraduate Tutor, University of Newcastle-upon-Tyne, U.K. Dissertation advisor to a number of undergraduate students conducting projects focusing on hydrology or biogeochemistry.

2001–2005	Graduate Research Assistant, University of Newcastle-upon-Tyne & University of Edinburgh, U.K. Ph.D. Research.

2000	Junior Research Associate, University of Newcastle-upon-Tyne, U.K. The investigation of turbidity maxima, inorganic nitrogen and nitrous oxide dynamics in a number of U.K. estuaries (4 months).

Honors, Awards, and Prizes

President's International Fellowship Initiative, Chinese Academy of Sciences (2024). 
Yentsch-Schindler Award, Association for the Sciences of Limnology and Oceanography (2019). 
Developing Scholar Award, Florida State University (2018). ($10,000). 

Fellowship(s)

American Association for the Advancement of Science (2022).
Fellow: Association for the Sciences of Limnology and Oceanography (2017).

Current Membership in Professional Organizations

American Chemical Society 
American Geophysical Union 
American Society of Limnology and Oceanography 

Teaching

Courses Taught

Wetlands and Rivers (OCC5930)
Introduction to Environmental Science (EVR1001)
Polar and Alpine Biogeochemistry (OCC5930)
Geomorphology and Geochemistry (OCC5930)
Introduction to Environmental Science (EVR1001)
Wetlands and Rivers (OCC5930)
Wetlands and Rivers (OCE4930)
Introduction to Environmental Science (EVR1001)
Organic Geochemistry of Natural Waters and Sediments (OCC5930)
Organic Geochemistry of Natural Waters and Sediments (OCE4930)
Wetlands and Rivers (OCE4930)
Introduction to Environmental Science (EVR1001)
Introduction to Environmental Science (EVR1001)

New Course Development

Polar and Alpine Biogeochemistry (2021)
Geomorphology and Geochemistry (2020)
Organic Geochemistry of Natural Waters and Sediments (2017)
Wetlands and Rivers (2016)
Introduction to Environmental Science Laboratory (2015)
Introduction to Environmental Science (2015)

Curriculum Development

Environmental Science Major - Discussion Group (2015)

Doctoral Committee Chair

Holt, A. D., graduate. (2024).
Starr, S., graduate. (2024).
Kurek, M., graduate. (2023).
Behnke, M. I., graduate. (2022).
Drake, T. W., graduate. (2019).
Johnston, S., graduate. (2019).
Anderson, J., doctoral student. 
Yvin, Oriane Marie-Therese, doctoral student. 

Doctoral Committee Cochair

Forrer, H. J., graduate. (2024).
Slentz, A. E., doctoral student. 

Doctoral Committee Member

Graham, K. A., graduate. (2022).
Law, J., graduate. (2021).
Weinhold, T., doctoral candidate. 
Duong, S., doctoral candidate. 
Core, M. L., doctoral student. 
Mustian, E. K., doctoral student. 
Payne, P. E., doctoral student. 

Master's Committee Chair

Miller, A., graduate. (2024).
Moore, M., graduate. (2023).
Holt, A. D., graduate. (2021).
Rogers, J. A., graduate. (2020).
Behnke, M. I., graduate. (2020).
Li, W., graduate. (2020).
Textor, S. R., graduate. (2018).
Luzius, C. R., graduate. (2018).
Malik, A., student. 

Master's Committee Member

Vallabhbhai Bhakta, A., graduate. (2024).
Engelbert, K. M., graduate. (2024).
Ogles, O., graduate. (2023).
Shultz, J. E., graduate. (2023).
Baysinger, M. R., graduate. (2021).
Putillo, A. R., graduate. (2020).
Walton, B. W., graduate. (2020).
Verbeke, B. A., graduate. (2018).
Gillis, A. J., graduate. (2018).
McColaugh, S., graduate. (2017).

Supervision of Student Research Not Related to Thesis or Dissertation

DeMocko, C. (Aug 2025–present). 

Pease, L. (Aug 2023–present). 

Katsaras, A. (Aug 2022–Jul 2024). 

Bowshaw, T. (Jul 2023–May 2024). 

Reynolds, T. (Jan 2020–Jul 2023). 

De La Cruz, Natasha (Aug 2017–Jul 2020). 

Cavallini, G. (Aug 2018–May 2019). 

McClellan, T. (Jan 2018–May 2019). 

Smith, H. (Aug 2017–May 2019). 

Rogers, J. (Aug 2016–Aug 2018). 

Grater, E. (Jan 2016–May 2017). 

Textor, S. (Jan–Aug 2016). 

Luzius, C. (Jan–May 2015). 

Research and Original Creative Work

I have published over 250 publications in peer reviewed journals and books, or book chapters (2021-2025 inclusive: 104 peer reviewed journal publications and 2 book chapters). To date I have authored 25 manuscripts (2021-2025 inclusive: 12 manuscripts) in Nature (3), Nature Geoscience (6), Nature Communications (8), Nature Reviews Earth & Environment (1), Science (1) and Proceedings of the National Academy of Sciences (6). In addition to the high impact manuscripts noted above I have a further 40 manuscripts published in journals with an impact factor > 10 (e.g. Water Research, Environmental Science & Technology, and Global Change Biology). In the last five years I have given numerous invited lectures including four plenary lectures at international conferences, I have brought in over $3 million in research funding to support my group since 2021. My research manuscripts are also highly cited as reflected in my h-index which is currently 83 (Google Scholar January 2026) and my annual citations have risen continuously in the last five years. 

Publications

Refereed Journal Articles

Hawkings, J. R., Bradley, J. A., Doting, E. L., Hassan, N., Hendry, K. R., Holt, A. D., Hood, E., Spencer, R. G. M., Stibal, M., Tranter, M., Venturelli, R. A., Wadham, J. L., & Bhatia, M. P. (2025). Glacier Biogeochemical Cycling and Downstream Impacts. Nature Reviews Earth & Environment, 6. Retrieved from https://www.nature.com/articles/s43017-025-00751-1 doi:doi.org/10.1038/s43017-025-00751-1

Forrer, H. J., Stukel, M. R., McKenna, A. M., Chen, H., Holt, A. D., Kranz, S. A., & Spencer, R. G. M. (2025). The Molecular-Level Diagenetic Clock of Sinking Marine Organic Matter. Proceedings of the National Academy of Sciences, 122, e2504769122. Retrieved from https://www.pnas.org/doi/abs/10.1073/pnas.2504769122 doi:doi.org/10.1073/pnas.2504769122

Mena-Rivera, L., Dean, J. F., Garnett, M. H., Holt, A. D., Pickard, A. E., Andersen, R., Graham, E., Bishop, J., Spencer, R. G. M., Evans, C. D., & Hilton, R. G. (2025). Wildfires Impact the Thermal Stability and Molecular Composition but Not the Age of Dissolved Organic Carbon Exported by Northern Streams. Journal of Geophysical Research Biogeosciences, 130, e2025JG009083. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2025JG009083 doi:doi.org/10.1029/JG009083

Li, S., Huang, T., Huang, C., Liu, J., Liu, Q., Gu, X., Spencer, R. G. M., Kellerman, A. M., McKenna, A. M., Ma, X., Jiang, Q., & Yang, H. (2025). Sources and mineralization determine the generation and transformation pathway of sedimentary organic matter over the past century. Environmental Research, 287, 123052. Retrieved from https://www.sciencedirect.com/science/article/abs/pii/S0013935125023059 doi:doi.org/10.1016/j.envres.2025.123052

McDonough, L. K., Holt, A. D., Hamilton, E., Randall, K., Saunders, K. M., Robinson, S. A., Spencer, R. G. M., McKenna, A. M., Linnenlucke, L., & Meredith, K.T.,. (2025). Shaping DOM Signatures in East Antarctic Lakes: Penguins, Mosses, Meltwater, and Processing Mechanisms. Journal of Geophysical Research Biogeosciences, 130, e2025JG008931. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2025JG008931 doi:doi.org/10.1029/2025JG008931

Holt, A. D., Fellman, J. B., Kellerman, A. M., Hood, E., Bosman, S. H., McKenna, A. M., Chanton, J. P., & Spencer, R. G. M. (2025). Brief Communication: Stream Microbes Preferentially Respire Young Carbon within the Ancient Glacier Dissolved Organic Carbon Pool. The Cryosphere, 19, 2769-2777. Retrieved from https://tc.copernicus.org/articles/19/2769/2025/ doi:doi.org/10.5194/tc-19-2769-2025

Galili, N., Bernasconi, S. M., Nissan, A., Alcolombri, U., Aquila, G., Di Bella, M., Blattmann, T. M., Haghipour, N., Italiano, F., Jaggi, M., Kaplan-Ashiri, I., Lee, K. S., Lechte, M. A., Magnabosco, C., Porter, S. M., Rudmin, M., Spencer, R. G. M., Stocker, R., Wang, Z., & Hemingway, J. D. (2025). The Geologic History of Marine Dissolved Organic Carbon from Iron Oxides. Nature, 644, 945-951. Retrieved from https://www.nature.com/articles/s41586-025-09383-3 doi:doi.org/10.1038/s41586-025-09383-3

Ruyle, B. J., Merder, J., Spencer, R. G. M., McClelland, J. W., Tank, S. E., & Michalak, A. M. (2025). Changes in the Composition of Nitrogen Yields in Large Arctic Rivers Linked to Temperature and Precipitation. Global Biogeochemical Cycles, 39, e2025GB008639. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2025GB008639 doi:doi.org/10.1029/2025GB008639

Zhou, Y., Wang, J., Zhou, L., Zhi, W., Zhang, Y., Qin, B., Wu, F., Woolway, R. I., Jane, S. F., Jeppesen, J., Hamilton, D. P., Xenopoulos, X. A., Spencer, R. G. M., Battin, T. J., & Leavitt, P. R. (2025). Episodic Flooding Causes Sudden Deoxygenation Shocks in Human-dominated Rivers. Nature Communications, 16, 6865. Retrieved from https://www.nature.com/articles/s41467-025-62236-5 doi:doi.org/10.1038/s41467-025-62236-5

Slentz, A. E., McKenna, A. M., Kellerman, A. M., Holt, A. D., Burns, A. J., Miller, M. G., Wagner, S., Tzortziou, M., Smith, H., Mannino, A., Chanton, J. P., & Spencer, R. G. M. (2025). Signatures of Arctic Change: Molecular‐Level Composition and Bioavailability of Shifting Dissolved Organic Matter Sources. Journal of Geophysical Research Biogeosciences, 130, e2025JG008899. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2025JG008899 doi:doi.org/10.1029/2025JG008899

Kurek, M. R., Muniz, R., Moura, J. M. S., Peucker-Ehrenbrink, B., Holmes, R. M., McKenna, A. M., & Spencer, R. G. M. (2025). Long-Term and Seasonal Drivers of Organic Matter in the Clearwater Tapajós River and Implications for the Amazon River Basin. Global Biogeochemical Cycles, 39, e2025GB008545. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2025GB008545 doi:doi.org/10.1029/2025GB008545

Dean, J. F., Coxon, G., Zheng, Y., Bishop, J., Garnett, M. H., Bastviken, D., Galy, V., Spencer, R. G. M., Tank, S. E., Tipper, E. T., Vonk, J. E., Wallin, M. B., Zhang, L., Evans, C. D., & Hilton, R. G. (2025). Old Carbon Routed from Land to the Atmosphere by Global River Systems. Nature, 642, 105-111. Retrieved from https://www.nature.com/articles/s41586-025-09023-w doi:doi.org/10.1038/s41586-025-09023-w

Rosengard, S. Z., Moura, J. M. S., Spencer, R. G. M., Johnson, C., McNichol, A., Boehman, B., & Galy, V. (2025). The Thermal Reactivity and Molecular Diversity of Particulate Organic Carbon in the Amazon River Mainstem. Journal of Geophysical Research Biogeosciences, 130, e2024JG008660. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024JG008660 doi:doi.org/10.1029/2024JG008660

Starr, S. F., Wickland, K. P., Kellerman, A. M., McKenna, A. M., Kurek, M. R., Miller, A., Katsaras, A., Douglas, T. A., Mackelprang, R., Shade, A. L., & Spencer, R. G. M. (2025). Organic Matter Composition Versus Microbial Source: Controls on Carbon Loss From Fen Wetland and Permafrost Soils. Journal of Geophysical Research Biogeosciences, 130, e2024JG008445. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024JG008445 doi:doi.org/10.1029/2024JG008445

Kurek, M. R., Pokrovsky, O., Krickov, I. V., Lim, A. G., Korets, M. A., & Spencer, R. G. M. (2025). Assessing the Molecular-Level Controls of Dissolved Organic Matter Cycling in West Siberian Lowland Rivers. Journal of Geophysical Research Biogeosciences, 130, e2024JG008537. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024JG008537 doi:doi.org/10.1029/2024JG008537

Li, S., Wang, X., Zhang, J., Spencer, R. G. M., Kellerman, A. M., McKenna, A. M., Ma, X., Jiang, Q., Huang, T., Yang, H., & Huang, C. (2025). Historical inputs and biogeochemical transformations of dissolved organic matter since 1850 CE in a small plateau-lake, Southwest China. Palaeogeography, Palaeoclimatology, Palaeoecology, 663, 112798. Retrieved from https://www.sciencedirect.com/science/article/pii/S0031018225000835?via%3Dihub doi:doi.org/10.1016/j.palaeo.2025.112798

Qian, M., Zhou, Y., Zhou, L., Zhang, Y., Pu, Y., Drake, T. W., Davidson, T. A., Spencer, R. G. M., Brookes, J. D., & Jeppesen, E. (2025). Inflow-modulated inputs of dissolved organic matter fuel carbon dioxide emissions from a large hyper-eutrophic lake. Water Research, 273, 123082. Retrieved from https://www.sciencedirect.com/science/article/pii/S0043135424019821 doi:doi.org/10.1016/j.watres.2024.123082

Holt, A. D., Barton, R., Wagner, S., McKenna, A. M., Fellman, J., Hood, E., Battin, T. I., Peter, H., Vanishing Glaciers Field Team, & Spencer, R. G. M. (2025). Widespread Black Carbon Deposition of Varied Origin Exported from Glaciers. Global Biogeochemical Cycles, 39, e2024GB008359. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024GB008359 doi:doi.org/10.1029/2024GB008359

Tian, S., Sha, A., Luo, Y., Spencer, R., Hu, X., Ning, M., Zhao, Y., Deng, R., Gao, Y., Liu, Y., & Li, D. (2025). A novel framework for river organic carbon retrieval through satellite data and machine learning. ISPRS Journal of Photogrammetry and Remote Sensing, 221, 109-123. Retrieved from https://www.sciencedirect.com/science/article/abs/pii/S0924271625000334 doi:doi.org/10.1016/j.isprsjprs.2025.01.028

Kellerman, A. M., Lin, Y., McKenna, A. M., Osborne, T. Z., Canion, A., Lee, Y., Freitas, A. M., Chanton, J. P., & Spencer, R. G. M. (2025). Identifying the Molecular Signatures of Organic Matter Leached from Land-Applied Biosolids via 21 T FT-ICR Mass Spectrometry. Environmental Science and Technology, 59, 2665-2674. Retrieved from https://pubs.acs.org/doi/full/10.1021/acs.est.3c06678 doi:doi.org/10.1021/acs.est.3c06678

Doting, E. L., Stevens, I. T., Kellerman, A. M., Rossel, P. E., Antony, R., McKenna, A. M., Tranter, M., Benning, L. G., Spencer, R. G. M., Hawkings, J. R., & Anesio, A. M. (2025). Molecular-level characterization of supraglacial dissolved and water-extractable organic matter along a hydrological flow path in a Greenland Ice Sheet micro-catchment. Biogeosciences, 22, 41-53. Retrieved from https://bg.copernicus.org/articles/22/41/2025/

Moore, O. C., Holt, A. D., Richards, L., McKenna, A., Spencer, R. G. M., Lapworth, D., Polya, D. A., Lloyd, J. R., & van Dongen, B. E. (2024). Characterisation of dissolved organic matter in two contrasting arsenic-prone sites in Kandal Province, Cambodia. Organic Geoschemistry, 198, 104886.

Holt, A. D., McKenna, A. M., Kellerman, A. M., Battin, T. I., Fellman, J. B., Hood, E., Schon, P. M., De Staercke, V., Styllas, M., Tolosano, M., & Spencer, R. G. M. (2024). Gradients of Deposition and In Situ Production Drive Global Glacier Organic Matter Composition. Global Biogeochemical Cycles, 38, e2024GB008212.

Yvin, O. M., Kurek, M. R., McKenna, A. M., Hawkings, J. R., & Spencer, R. G. M. (2024). Comparison of dissolved organic matter composition from various sorbents using ultra-high resolution mass spectrometry. Organic Geoschemistry, 196, 104846.

Bristol, E. M., Behnke, M. I., Spencer, R. G. M., McKenna, A., Jones, B. M., Bull, D. L., & McClelland, J. W. (2024). Eroding Permafrost Coastlines Release Biodegradable Dissolved Organic Carbon to the Arctic Ocean. Journal of Geophysical Research Biogeosciences, 129, e2024JG008233.

Burns, A. J., Spencer, R. G. M., Kellerman, A. M., Yan, G., Leonard, L., Kaiser, K., Mannino, A., Tzortziou, M., & Hernes, P. J. (2024). The Distinct Composition and Transformation of Terrestrial Organic Carbon in the Yukon River Delta and Plume During the Mighty Spring Freshet. Journal of Geophysical Research Biogeosciences, 129, e2023JG007812. doi:10.1029/2023JG007812

Rosengard, S. Z., Moura, J. M. S., Spencer, R. G. M., Johnson, C., McNichol, A., Steen, A., & Galy, V. (2024). Depth‐Partitioning of Particulate Organic Carbon Composition in the Rising and Falling Stages of the Amazon River. Geochemistry, Geophysics, Geosystems, 25, e2023GC011273. doi:10.1029/2023GC011273

Wang, Y., Wang, X., Han, L., McKenna, A., Kellerman, A. M., Spencer, R. G. M., Yang, Z., & Xu, Y. (2024). Concentration and compositional controls on degradation of permafrost-derived dissolved organic matter on the Qinghai–Tibetan Plateau. Limnology and Oceanography Letters, 1-10. doi:doi.org/10.1002/lol2.10388

Kurek, M. R., Wickland, K. P., Nichols, N. A., McKenna, A. M., Anderson, S. M., Dornblaser, M. M., Koupaei-Abyazani, N., Poulin, B. A., Bansel, S., Fellman, J. B., Druschel, G. K., Bernhardt, E. S., & Spencer, R. G. M. (2024). Linking Dissolved Organic Matter Composition to Landscape Properties in Wetlands Across the United States of America. Global Biogeochemical Cycles, 38, e2023GB007917. doi:doi.org/10.1029/ 2023GB007917

Starr, S., Frey, K. E., Smith, L. C., Kellerman, A. M., McKenna, A. M., & Spencer, R. G. M. (2024). Peatlands Versus Permafrost: Landscape Features as Drivers of Dissolved Organic Matter Composition in West Siberian Rivers. Journal of Geophysical Research Biogeosciences, 129, e2023JG007797. doi:doi.org/10.1029/2023JG007797

Yang, X., Zhou, Y., Yang, Y., Zhang, Y., Spencer, R. G. M., Brookes, J. D., Jeppesen, H., Zhang, H., & Zhou, Q. (2024). Optical measurements of dissolved organic matter as proxies for CODMn and BOD5 in plateau lakes. Environmental Science and Ecotechnology, 19, 100326. doi:doi.org/10.1016/j.ese.2023.100326

Zhang, T., Zhou, L., Zhou, Y., Zhang, Y., Guo, J., Han, Y., Zhang, X., Hu, L., Jank, K-S., Spencer, R. G. M., Brookes, J. D., Dolfing, J., & Jeppesen, E. (2024). Terrestrial dissolved organic matter inputs accompanied by dissolved oxygen depletion and declining pH exacerbate CO2 emissions from a major Chinese reservoir. Water Research, 251, 121155. doi:doi.org/10.1016/j.watres.2024.121155

Zhou, L., Wu, Y., Zhou, Y., Zhang, Y., Xu, H., Kyoung-Soon, J., Dolfing, J., Spencer, R. G. M., & Jeppesen, E. (2024). Terrestrial dissolved organic matter inputs drive the temporal dynamics of riverine bacterial ecological networks and assembly processes. Water Research, 249, 120955. doi:doi.org/10.1016/j.watres.2023.120955

Podgorski, D. C., Walley, J., Shields, M. P., Hebert, D., Harsha, M. L., Spencer, R. G. M., Tarr, M. A., & Zito, P. (2024). Dispersant-enhanced photodissolution of macondo crude oil: A molecular perspective. Journal of Hazardous Materials, 461, 132558. doi:doi.org/10.1016/j.jhazmat.2023.132558

Meng, L., Xue, J., Zhao, C., Huang, T., Kellerman, A. M., Spencer, R. G. M., & Huang, C. (2023). N-containing dissolved organic matter promotes dissolved inorganic carbon supersaturation in the Yangtze River, China. Water Research, 247, 120808. doi:doi.org/10.1016/j.watres.2023.120808

Moore, M. R. N., Tank, S. E., Kurek, M. R., Taskovic, M., McKenna, A. M., Smith, J. L. J., Koklej, S. V., & Spencer, R. G. M. (2023). Ultrahigh resolution dissolved organic matter characterization reveals distinct permafrost characteristics on the Peel Plateau, Canada. Biogeochemistry, 166, 1-19. doi:doi.org/10.1007/s10533-023-01101-3

Garcia-Tigreros, F., Elder, C., Kurek, M. R., Miller, B. L., Wickland, K. P., Dornblaser, M. M., Striegl, R. G., Smith, L. C., Spencer, R. G. M., Miller, C. E., & Butman, D. E. (2023). Arctic-boreal lakes of interior Alaska dominated by contemporary carbon. Environmental Research Letters, 18, 124024. doi:DOI 10.1088/1748-9326/ad0993

Page, H. N., McCoy, S., Spencer, R. G. M., Burnham, K. A., Hewett, C., & Johnson, M. (2023). Effects of ocean acidification on growth and photophysiology of two tropical reef macroalgae. PLOS ONE, 18, e0286661. doi:doi.org/10.1371/journal.pone.0286661

Stubbins, A., Zhu, L., Zhao, S., Spencer, R. G. M., & Podgorski, D. C. (2023). Molecular Signatures of Dissolved Organic Matter Generated from the Photodissolution of Microplastics in Sunlit Seawater. Environmental Science & Technology, 57, 20097-20106. doi:doi.org/10.1021/acs.est.1c03592

Behnke, M. I., Fellman, J. B., Nagorski, S., Spencer, R. G. M., & Hood, E. (2023). The Role of Glacier Erosion in Riverine Particulate Organic Carbon Export. Global Biogeochemical Cycles, 37, e2023GB007721. doi:doi.org/10.1019/2023GB007721

Drake, T. W., Barthel, M., Mbongo, C. E., Kurek, M. R., Spencer, R. G. M., McKenna, A. M., Van Oost, K., & Six, J. (2023). Hydrology drives export and composition of carbon in a pristine tropical river. Limnology and Oceanography, 68, 2476-2491. doi:doi.org/10.1002/lno.12436

Matiasek, S. J., Pellerin, B. A., Spencer, R. G. M., Bergamaschi, B. A., & Hernes, P. J. (2023). Water-soluble Organic Carbon Release from Mineral Soils and Sediments in an Irrigated Agricultural System. Journal of Environmental Management, 343, 118184. doi:doi.org/10.1016/j.jenvman.2023.118184

Kellerman, A. M., Hernes, P. J., McKenna, A. M., Clark, B. J., Mann, P. J., Stubbins, A., Zimov, N., & Spencer, R. G. M. (2023). Mixing behavior of dissolved organic matter at the Yukon and Kolyma land ocean interface. Marine Chemistry, 255, 104281. doi:doi.org/10.1016/j.marchem.2023.104281

Clark, J. B., Mannino, A., Spencer, R. G. M., Tank, S. E., & McClelland, J. W. (2023). Quantification of Discharge-Specific Effects on Dissolved Organic Matter Export from Major Arctic Rivers from 1982 through 2019. Global Biogeochemical Cycles, 37, e2023GB007854. doi:doi.org/10.1029/2023GB007854

Wang, C., Pavelsky, T. M., Garcia-Tigreros, F., Kurek, M. R., Smith, L. C., Butman, D. E., Spencer, R. G. M., & Peters, D. L. (2023). Quantification of wetland vegetation communities features with airborne AVIRIS-NG, UAVSAR, and UAV LiDAR data in Peace-Athabasca Delta. Remote Sensing of Environment, 294, 113646. doi:doi.org/10.1016/j.rse.2023.113646

Tank, S. E., McClelland, J. W., Spencer, R. G. M., Shiklomanov, A. I., Suslova, A., Moatar, F., & Holmes, R. M. (2023). Recent trends in the chemistry of major northern rivers signal widespread Arctic change. Nature Geoscience, 16, 789–796. doi:doi.org/10.1038/s41561-023-01247-7

Holt, A. D., Kellerman, A. M., Battin, T. I., McKenna, A., Hood, E., Andino, P., Crespo-Perez, P., Hannes, P., Tolosano, M., & Spencer, R. G. M. (2023). A Tropical Cocktail of Organic Matter Sources: Variability in Supraglacial and Glacier Outflow Dissolved Organic Matter Composition and Age Across the Ecuadorian Andes. Journal of Geophysical Research Biogeosciences, 128, e2022JG007188. doi:doi.org/10.1029/2022JG007188

Kurek, M. R., Garcia-Tigreros, F., Wickland, K. P., & Spencer, R. G. M. (2023). High Voltage: The Molecular Properties of Redox-Active Dissolved Organic Matter in Northern High-Latitude Lakes. Environmental Science & Technology, 57, 8617-8627. doi:doi.org/10.1021/acs.est.3c01782

Li, S., Meng, L., Zhao, C., Gu, Y., Spencer, R. G. M., Alvarez-Salgado, X. A., Kellerman, A. M., McKenna, A. M., Huang, T., Yang, H., & Huang, C. (2023). Spatiotemporal response of dissolved organic matter diversity to natural and anthropogenic forces along the whole mainstream of the Yangtze River. Water Research, 234, 119812. doi:doi.org/10.1016/j.watres.2023.119812

Zhou, L., Yonghong, W., Junzhuo, L., Pengfei, S., Ying, X., Dolfing, J., Spencer, R. G. M., & Jeppesen, E. (2023). The importance of periphytic biofilms for carbon cycling in paddy fields: A review. Pedosphere, 33. doi:doi.org/10.1016/j.pedsph.2023.03.005

Starr, S., Johnston, S. E., Sobolev, N., Perminova, I., Kellerman, A., Fiske, G., Bulygina, E., Shiklomanov, A., McKenna, A., & Spencer, R. G. M. (2023). Characterizing Uncertainty in Pan-Arctic Land-Ocean Dissolved Organic Carbon Flux: Insights From the Onega River, Russia. Journal of Geophysical Research Biogeosciences, 128, e2022JG007073. doi:doi.org/10.1029/2022JG007073

Venturelli, R. A., Boehman, B., Davis, C., Hawkings, J. R., Johnston, S. E., Gustafson, C. D., Spencer, R. G. M., Rosenheim, B. E., & SALSA Science Team. (2023). Constraints on the Timing and Extent of Deglacial Grounding Line Retreat in West Antarctica. AGU Advances, 4, e2022AV000846. doi:doi.org/10.1029/2022AV000846

Bao, H., Wu, Y., Zhan, X., Wang, X., Spencer, R. G. M., Hernes, P. J., Feng, X., Lee, L. C., Lee, J. C., & Zhang, J. (2023). Global Riverine Export of Dissolved Lignin Constrained by Hydrology, Geomorphology, and Land-Cover. Global Biogeochemical Cycles, 37, e2022GB007607. doi:doi.org/10.1029/2022GB007607

Zhou, L., Zhou, Y., Zhang, Y., Wu, Y., Jang, K. S., Spencer, R. G. M., Brookes, J. D., & Jeppesen, E. (2023). Hydrological Controls on Dissolved Organic Matter Composition throughout the Aquatic Continuum of the Watershed of Selin Co, the Largest Lake on the Tibetan Plateau. Environmental Science & Technology, 57, 4668–4678. doi:doi.org/10.1021/acs.est.2c08257

Zhou, Y., Chen, L., Zhou, L., Zhang, Y., Peng, K., Gong, Z., Jang, K. S., Spencer, R. G. M., Jeppesen, E., Brookes, J. D., Kothawala, D. N., & Wu, F. (2023). Key factors driving dissolved organic matter composition and bioavailability in lakes situated along the Eastern Route of the South-to-North Water Diversion Project, China. Water Research, 233, 119782. doi:doi.org/10.1016/j.watres.2023.119782

Liao, J., Huang, Q. H., Liu, G. N., Wang, N. T., Qiu, Z. P., Hu, C. Y., & Spencer, R. G. M. (2023). Seasonal hydrological change shaping the relationship between dissolved organic matter and land use in the middle reaches of the Yangtze river. Biogeochemistry, 163, 329-345. doi:doi.org/10.1007/s10533-023-01035-w

Behnke, M. I., Fellman, J. B., D'Amore, D. V., & Spencer, R. G. M. (2023). Trees in the Stream: Determining Patterns of Terrestrial Dissolved Organic Matter Contributions to the Northeast Pacific Coastal Temperate Rainforest. Journal of Geophysical Research Biogeosciences, 128, e2022JG007027. doi:doi.org/10.1029/2022JG007027

Behnke, M. I., Tank, S. E., McClelland, J. W., Holmes, R. M., Haghipour, N., Eglinton, T. I., Raymond, P. A., Suslova, A., Zhulidov, A. V., Gurtovaya, T., Zimov, N., Zimov, S., Mutter, E. A., Amos, E., & Spencer, R. G. M. (2023). Aquatic biomass is a major source to particulate organic matter export in large Arctic rivers. Proceedings of the National Academy of Sciences, 120, e2209883120. doi:doi.org/10.1073/pnas.2209883120

Vaughn, D. R., Kellerman, A. M., Wickland, K. P., Striegl, R. G., Podgorski, D. C., Hawkings, J. R., Nienhuis, J. R., Dornblaser, M. M., Stets, E. G., & Spencer, R. G. M. (2023). Bioavailability of dissolved organic matter varies with anthropogenic landcover in the Upper Mississippi River Basin. Water Research, 229, 119357. doi:doi.org/10.1016/j.watres.2022.119357

Zhou, Y., Yu, X., Zhou, L., Zhang, Y., Xu, H., Zhu, M., Zhu, G., Jang, K. S., Spencer, R. G. M., Jeppesen, E., Brookes, J. D., Kothawala, D. N., & Wu, F. (2023). Rainstorms drive export of aromatic and concurrent bio-labile organic matter to a large eutrophic lake and its major tributaries. Water Research, 229, 119448. doi:doi.org/10.1016/j.watres.2022.119448

Kurek, M. R., Garcia-Tigreros, F., Wickland, K. P., Frey, K., Dornblaser, M. M., Striegl, R. G., Niles, S. F., McKenna, A. M., Aukes, P. J. K., Kyzivat, E. D., Wang, C., Pavelsky, T. M., Smith, L. C., Schiff, S. L., Butman, D., & Spencer, R. G. M. (2023). Hydrologic and landscape controls on dissolved organic matter composition across western North American Arctic lakes. Global Biogeochemical Cycles, 37, e2022GB007495. doi:doi.org/10.1029/2022GB007495

Chin, Y. P., McKnight, D. M., D'Andrilli, J., Brooks, N., Cawley, K., Guerard, J., Perdue, E. M., Spencer, R. G. M., Ward, C., Remucal, C. K., & Reckhow, D. (2023). Identification of next-generation International Humic Substances Society reference materials for advancing the understanding of the role of natural organic matter in the Anthropocene. Aquatic Sciences, 85. doi:doi.org/10.1007/s00027-022-00923-x

Francis, A., Ganeshram, R. S., Tuerena, R. E., Spencer, R. G. M., Holmes, R. M., Rogers, J. A., & Mahaffey, C. (2023). Permafrost degradation and nitrogen cycling in Arctic rivers: insights from stable nitrogen isotope studies. Biogeosciences, 20, 365-381. doi:doi.org/10.5194/bg-20-365-2023

Clark, J. B., Mannino, A., Tzortziou, M., Spencer, R. G. M., & Hernes, P. J. (2022). The Transformation and Export of Organic Carbon Across an Arctic River-Delta-Ocean Continuum. Journal of Geophysical Research-Biogeosciences, 127. doi:doi.org/10.1029/2022JG007139

Li, Y., Zhou, Y., Zhou, L., Zhang, Y., Xu, H., Jang, K. S., Kothawala, D. N., Spencer, R. G. M., Jeppesen, E., Brookes, J. D., Davidson, T. A., & Wu, F. (2022). Changes in Water Chemistry Associated with Rainstorm Events Increase Carbon Emissions from the Inflowing River Mouth of a Major Drinking Water Reservoir. Environmental Science & Technology. doi:doi.org/10.1021/acs.est.2c06405

Wang, J., Zhou, Y., Zhou, L., Zhang, Y., Qin, B., Spencer, R. G. M., Brookes, J. D., Jeppesen, E., Weyhenmeyer, G. A., & Wu, F. (2022). Urbanization in developing countries overrides catchment productivity in fueling inland water CO2 emissions. Global Change Biology. doi:doi.org/10.1111/gcb.16475

Novak, M. G., Mannino, A., Clark, J. B., Hernes, P. J., Tzortziou, M., Spencer, R. G. M., Kellerman, A. M., & Grunert, B. (2022). Arctic biogeochemical and optical properties of dissolved organic matter across river to sea gradients. Frontiers in Marine Science, 9. doi:doi.org/10.3389/fmars.2022.949034

Dubnick, A., Faber, Q., Hawkings, J. R., Bramall, N., Christner, B. C., Doran, P. T., Nadeau, J., Snyder, C., Kellerman, A. M., McKenna, A. M., Spencer, R. G. M., & Skidmore, M. L. (2022). Biogeochemical Responses to Mixing of Glacial Meltwater and Hot Spring Discharge in the Mount St. Helens Crater. Journal of Geophysical Research Biogeosciences, 127. doi:doi.org/10.1029/2022JG006852

Hu, X., Zhou, Y., Zhou, L., Zhang, Y., Wu, L., Xu, H., Zhu, G., Jang, K. S., Spencer, R. G. M., Jeppesen, E., Brookes, J. D., & Wu, F. (2022). Urban and agricultural land use regulates the molecular composition and bio-lability of fluvial dissolved organic matter in human-impacted southeastern China. Carbon Research, 1. doi:doi.org/10.1007/s44246-022-00020-6

LaBrie, R., Pequin, B., St-Gelais, N. F., Yashayaev, I., Cherrier, J., Gelinas, Y., Guillemette, F., Podgorski, D. C., Spencer, R. G. M., Tremblay, L., & Maranger, R. (2022). Deep ocean microbial communities produce more stable dissolved organic matter through the succession of rare prokaryotes. Science Advances, 8. doi:doi/10.1126/sciadv.abn0035

Voss, B. M., Eglinton, T. I., Peucker-Ehrenbrink, B. P., Galy, V., Lang, S. Q., McIntyre, C., Spencer, R. G. M., Bulygina, E., Wang, Z. A., & Guay, K. A. (2022). Isotopic evidence for sources of dissolved carbon and the role of organic matter respiration in the Fraser River basin, Canada. Biogeochemistry. doi:doi.org/10.1007/s10533-022-00945-5

Kurek, M. R., Stubbins, A., Drake, T. W., Dittmar, T., Moura, J. M. S., Holmes, R. M., Osterholz, H., Six, J., Wabakanghanzi, J. N., Dinga, B., Mitsuya, M., & Spencer, R. G. M. (2022). Organic Molecular Signatures of the Congo River and Comparison to the Amazon. Global Biogeochemical Cycles, 36. doi:doi.org/10.1029/2022GB007301

McDonough, L. K., Andersen, M. S., Behnke, M. I., Rutlidge, H., Oudone, P., Meredith, K., O'Carroll, D. M., Santos, I. R., Marjo, C. E., Spencer, R. G. M., McKenna, A. M., & Baker, A. (2022). A new conceptual framework for the transformation of groundwater dissolved organic matter. Nature Communications, 13. doi:doi.org/10.1038/s41467-022-29711-9

Koch, J. C., Bogard, M. J., Butman, D. E., Finlay, K., Ebel, B., James, J., Johnston, S. E., Jorgenson, M. T., Pastick, N. J., Spencer, R. G. M., Striegl, R., Walvoord, M., & Wickland, K. P. (2022). Heterogeneous Patterns of Aged Organic Carbon Export Driven by Hydrologic Flow Paths, Soil Texture, Fire, and Thaw in Discontinuous Permafrost Headwaters. Global Biogeochemical Cycles, 36. doi:doi.org/10.1029/2021GB007242

Zolkos, S., Zhulidov, A. V., Gurtovaya, T. Y., Gordeev, V. V., Berdnikov, S., Pavlova, N., Kalko, E. A., Kuklina, Y. A., Sunderland, E. M., Tank, S. E., McClelland, J. W., Spencer, R. G. M., Krabbenhoft, D. P., Robarts, R., & Holmes, R. M. (2022). Multidecadal declines in particulate mercury and sediment export from Russian rivers in the pan-Arctic basin. Proceedings of the National Academy of Sciences, 11. doi:e2119857119

Kurek, M. R., Frey, K. E., Guillemette, F., Podgorski, D. C., Townsend-Small, A., Arp, C. D., Kellerman, A. M., & Spencer, R. G. M. (2022). Trapped Under Ice: Spatial and Seasonal Dynamics of Dissolved Organic Matter Composition in Tundra Lakes. Journal of Geophysical Research Biogeosciences, 127. doi:doi.org/10.1029/2021JG006578

Zhou, Y., Zhou, L., Zhang, Y., Zhu, G., Qin, B., Jang, K. S., Spencer, R. G. M., Kothawala, D. N., Jeppesen, E., Brookes, J. D., & Wu, F. (2022). Unraveling the Role of Anthropogenic and Natural Drivers in Shaping the Molecular Composition and Biolability of Dissolved Organic Matter in Non-pristine Lakes. Environmental Science & Technology. doi:doi.org/10.1021/acs.est.1c08003

Behnke, M. I., Fellman, J. B., D'Amore, D. V., Gomez, S. M., & Spencer, R. G. M. (2022). From canopy to consumer: what makes and modifies terrestrial DOM in a temperate forest. Biogeochemistry. doi:doi.org/10.1007/s10533-022-00906-y

Wang, Y. H., Zhang, P., He, C., Yu, J. C., Shi, Q., Dahlgren, R. A., Spencer, R. G. M., Yang, Z. B., & Wang, J. J. (2022). Molecular signatures of soil-derived dissolved organic matter constrained by mineral weathering. Fundamental Research. doi:doi.org/10.1016/j.fmre.2022.01.032

Li, S., Fang, J., Zhu, X., Spencer, R. G. M., Alvarez-Salgado, X. A., Deng, Y., Huang, T., Yang, H., & Huang, C. (2022). Properties of sediment dissolved organic matter respond to eutrophication and interact with bacterial communities in a plateau lake. Environmental Pollution, 301. doi:doi.org/10.1016/j.envpol.2022.118996

Cory, A. B., Chanton, J. P., Spencer, R. G. M., Ogles, O. C., Rich, V. I., McCalley, C. K., & Wilson, R. M. (2022). Quantifying the inhibitory impact of soluble phenolics on anaerobic carbon mineralization in a thawing permafrost peatland. PLOS One, 17. doi:doi.org/10.1371/journal.pone.0252743

Barthel, M., Bauters, M., Baumgartner, S., Drake, T. W., Bey, N. M., Bush, G., Boeckx, P., Botefa, C. I., Deriaz, N., Ekamba, G. L., Gallarotti, N., Mbayu, F. M., Mugula, J. K., Makelele, I. A., Mbongo, C. E., Mohn, J., Spencer, R. G. M., Vanluawe, B., Van Oost, K., & Six, J. (2022). Low N2O and variable CH4 fluxes from tropical forest soils of the Congo Basin. Nature Communications, 13. doi:doi.org/10.1038/s41467-022-27978-6

Holt, A. D., Kellerman, A. M., Li, W., Stubbins, A., Wagner, S., McKenna, A., Fellman, J., Hood, E., & Spencer, R. G. M. (2021). Assessing the role of photochemistry in driving the composition of dissolved organic matter in glacier runoff. Journal of Geophysical Research-Biogeosciences, 126. doi:doi.org/10.1029/2021JG006516

Mann, P. J., Strauss, J., Palmtag, J., Dowdy, K., Ogneva, O., Fuchs, M., Bedington, M., Torres, R., Polimene, L., Overduin, P., Mollenhauer, G., Grosse, G., Rachold, V., Sobczak, W. V., Spencer, R. G. M., & Juhls, B. (2021). Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes. Ambio. doi:doi:10.1007/s13280-021-01666-z

Johnston, S. E., Finlay, K., Spencer, R. G. M., Butman, D. E., Mertz, M., Striegl, R. G., & Bogard, M. J. (2021). Zooplankton release complex dissolved organic matter to aquatic environments. Biogeochemistry. doi:doi.org/10/1007/s10533-021-00876-7

Vaughn, D. R., Kellerman, A. M., Wickland, K. P., Striegl, R. G., Podgorski, D. C., Hawkings, J. R., Nienhuis, J. H., Dornblaser, M. M., Stets, E. G., & Spencer, R. G. M. (2021). Anthropogenic landcover impacts fluvial dissolved organic matter composition in the Upper Mississippi River Basin. Biogeochemistry. Retrieved from doi.org/10/1007/s10533-021-00852-1

Rodriguez-Cardona, B. M., Wymore, A. S., Argerich, A., Barnes, R. T., Bernal, S., Brookshire, E. N. J., Coble, A. A., Dodds, W. K., Fazekas, H. M., Helton, A. M., Johnes, P. J., Johnson, S. L., Johnson, J. B., Jones, J. B., Kaushal, S. S., Kortelainen, P., Lopez-Lloreda, C., Spencer, R. G. M., & McDowell, W. H. (2021). Shifting stoichiometry: Long-term trends in stream dissolved organic matter reveal altered C:N ratios due to history of atmospheric acid deposition. Global Change Biology. doi:doi.org/10.111/gcb.15965

Johnston, S. E., Carey, J. C., Kellerman, A., Podgorski, D. C., Gewirtzman, J., & Spencer, R. G. M. (2021). Controls on riverine dissolved organic matter composition across an Arctic-Boreal latitudinal gradient. Journal of Geophysical Research-Biogeosciences, 126. doi:doi.org/10.1029/202JG005988

Wymore, A., Johnes, P. J., Bernal, S., Brookshire, E. N. J., Fazekas, H. M., Helton, A., Argerich, A., Barnes, R. T., Coble, A. A., Dodds, W. K., Haq, S., Johnson, S. L., Jones, S. B., Kaushal, S. S., Kortelainen, P., Lopez-Lloreda, C., Rodriguez-Cardona, B. M., Spencer, R. G. M., Sullivan, P. L., & Yates, C. A. (2021). Gradients of anthropogenic nutrient enrichment alter N composition and DOM stoichiometry in freshwater ecosystems. Global Biogeochemical Cycles, 35. doi:doi.org/10/1029/2021GB006953

Saatchi, S., Longo, M., Xu, L., Yang, Y., Abe, H., Andre, M., Spencer, R. G. M., Vargas, R., Venter, M., West, J., Brumby, S., & Elmore, A. C. (2021). Detecting vulnerability of humid tropical forests to multiple stressors. One Earth, 4, 988-1003. doi:doi.org/10.1016/j.oneear.2021.06.002

Rogers, J. A., Galy, V., Kellerman, A. M., Chanton, J. P., Zimov, N., & Spencer, R. G. M. (2021). Limited Presence of Permafrost Dissolved Organic Matter in the Kolyma River, Siberia Revealed by Ramped Oxidation. Journal of Geophysical Research Biogeosciences, 126. doi:doi.org/10.1029/2020JG005977

Wagner, S., Coppola, A. I., Stubbins, A., Dittmar, T., Niggemann, J., Drake, T. W., Seidel, M., Spencer, R. G. M., & Bao, H. (2021). Questions remain about the biolability of dissolved black carbon along the combustion continuum. Nature Communications, 12. doi:doi.org/10.1038/s41467-021-24477-y

Kurek, M. R., Stubbins, A., Drake, T. W., Moura, J. M. S., Holmes, R. M., Osterholz, H., Dittmar, T., Peucker-Ehrenbrink, B., Mitsuya, M., & Spencer, R. G. M. (2021). Drivers of Organic Molecular Signatures in the Amazon River. Global Biogeochemical Cycles. doi:doi.org/ 10.1029/2021GB006938.

Holt, A. D., Fellman, J., Hood, E., Kellerman, A. M., Raymond, P., Stubbins, A., Dittmar, T., & Spencer, R. G. M. (2021). The Evolution of Stream Dissolved Organic Matter Composition Following Glacier Retreat in Coastal Watersheds of southeast Alaska. Biogeochemistry. doi:doi.org/10.1007/s10533-021-00815-6

Hawkings, J. R., Linhoff, B. S., Wadham, J. L., Stibal, M., Lamborg, C. H., Carling, G. T., Lamarche-Gagnon, G., Kohler, T. J., Ward, R., Hendry, K. R., Falteisek, L., Kellerman, A. M., Cameron, K. A., Hatton, J. E., Tingey, S., Holt, A. D., Vinsova, P., Hofer, S., Meire, L., & Spencer, R. G. M. (2021). Large Subglacial Source of Mercury from the Southwestern Margin of the Greenland Ice Sheet. Nature Geoscience. doi:doi.org/10.1038/s41561-021-00753-w

Behnke, M. I., McClelland, J. W., Tank, S. E., Kellerman, A. M., Holmes, R. M., Haghipour, N., Eglinton, T. I., Raymond, P. A., Suslova, A., Zhulidov, A. V., Gurtovaya, T., Zimov, N., Zimov, S., Mutter, E. A., Amos, E., & Spencer, R. G. M. (2021). Pan‐Arctic Riverine Dissolved Organic Matter: Synchronous Molecular Stability, Shifting Sources and Subsidies. Global Biogeochemical Cycles, 35. doi:e2020GB006871

Marshall, M. G., Kellerman, A. M., Wadham, J. L., Hawkings, J. R., Daneri, G., Torres, R., Pryer, H. V., Beaton, A., Ng, H. C., Urra, A., Robinson, L. F., & Spencer, R. G. M. (2021). Seasonal Changes in Dissolved Organic Matter Composition in a Patagonian Fjord Affected by Glacier Melt Inputs. Frontiers in Marine Science, 8.

Feng, L., An, Y., Xu, J., Kellerman, A. M., Chacon Patino, M. L., & Spencer, R. G. M. (2021). Molecular Insights into Glacial Cryoconite Dissolved Organic Matter Evolution under Dark Conditions during the Ablation Season on the Tibetan Plateau. ACS Earth and Space Chemistry. doi:doi.org/10.1021/acsearthspacechem.0c00361

Drake, T. W., Hemingway, J. D., Kurek, M. R., Peucker-Ehrenbrink, B., Brown, K. A., Holmes, R. M., Galy, V., Moura, J. M. S., Mitsuya, M., Wassenaar, L. I., Six, J., & Spencer, R. G. M. (2021). The Pulse of the Amazon: Fluxes of dissolved organic carbon, nutrients, and ions from the world's largest river. Global Biogeochemical Cycles. doi:doi.org/10.1029/2020GB006895

Chen, M., Li, C., Spencer, R. G. M., Maie, N., Hur, J., McKenna, A. M., & Yan, F. (2021). Climatic, land cover, and anthropogenic controls on dissolved organic matter quantity and quality from major alpine rivers across the Himalayan-Tibetan Plateau. Science of the Total Environment. doi:doi.org/10.1016/j.scitotenv.2020.142411

Zhou, Y., Yao, X., Zhou, L., Zhao, Z., Wang, X., Jang, K. S., Tian, W., Y. Zhang, Podgorski, D. C., Spencer, R. G. M., Kothawala, D. N., Jeppesen, E., & Wu, F. (2021). How hydrology and anthropogenic activity influence the molecular composition and export of dissolved organic matter: Observations along a large river continuum. Limnology & Oceanography, 66, 1730-1742. doi:doi.org/10.1002/lno.11716

Kellerman, A. M., Vonk, J., McColaugh, S., Podgorski, D. C., van Wilden, E., Hawkings, J. R., Johnston, S. E., Humayun, M., & Spencer, R. G. M. (2021). Molecular Signatures of Glacial Dissolved Organic Matter from Svalbard and Greenland. Global Biogeochemical Cycles. doi:doi.org/10.1029/2020GB006709

Xenopoulos, M. A., Barnes, R. T., Boodoo, K. S., Butman, D., Catalan, N., D'Amario, S. C., Fasching, C., Kothawala, D. N., Pisani, O., Solomon, C. T., Spencer, R. G. M., Williams, C. J., & Wilson, H. F. (2021). How humans alter dissolved organic matter composition in freshwater: relevance for the Earth's biogeochemistry. Biogeochemistry. doi:doi.org/10.1007/s10533-021-00753-3

Podgorski, D. C., Zito, P., Kellerman, A. M., Bekins, B. A., Cozzarelli, I. M., Smith, D. F., Cao, X., Schmidt-Rohr, K., Wagner, S., Stubbins, A., & Spencer, R. G. M. (2021). Hydrocarbons to carboxyl-rich alicyclic molecules: A continuum model to describe biodegradation of petroleum-derived dissolved organic matter in contaminated groundwater plumes. Journal of Hazardous Materials. doi:doi.org/10.1016/j.jhazmat.2020.123998

Kurek, M. R., Poulin, B. A., McKenna, A. M., & Spencer, R. G. M. (2020). Deciphering Dissolved Organic Matter: Ionization, Dopant, and Fragmentation Insights via Fourier Transform-Ion Cyclotron Resonance Mass Spectrometry. Environmental Science & Technology. doi:doi.org/10.1021/acs.est.0c05206

Hawkings, J. R., Skidmore, M. L., Wadham, J. L., Priscu, J. C., Morton, P. L., Hatton, J. E., Gardner, C. B., Kohler, T. J., Stibal, M., Bagshaw, E. A., Steigmeyer, A., Barker, J., Dore, J. E., Lyons, W. B., Tranter, M., Spencer, R. G. M., & SALSA Science Team. (2020). Enhanced trace element mobilization by Earth's ice sheets. Proceedings of the National Academy of Sciences. doi:doi.org/10.1073/pnas.2014378117

Wologo, E., Shakil, S., Zolkos, S., Textor, S., Ewing, S., Klassen, J., Spencer, R. G. M., Podgorski, D. C., Tank, S. E., Baker, M. A., O'Donnell, J. A., Wickland, K. P., Foks, S. S. W., Zarnetske, J. P., Lee-Cullin, J., Liu, F., Yang, Y., Kortelainen, P., Kolehmainen, J., & Dean, J. F. (2020). Stream dissolved organic matter in permafrost regions shows surprising compositional similarities but negative priming and nutrient effects. Global Biogeochemical Cycles. doi:doi.org/10.1029/2020GB006719

Putillo, A. R., Flint, M., Seminoff, J. A., Spencer, R. G. M., & Fuentes, M. M. P. B. (2020). Plasma Biochemistry Profiles of Juvenile Green Turtles (Chelonia Mydas) from the Bahamas with a Potential Influence of Diet. Journal of Wildlife Diseases, 56. doi:doi.org/10.7589/JWD-D-20-00009

Behnke, M. I., Stubbins, A., Fellman, J. B., Hood, E., Dittmar, T., & Spencer, R. G. M. (2020). Dissolved organic matter sources in glacierized watersheds delineated through compositional and carbon isotopic modeling. Limnology & Oceanography. doi:doi.org/10.1002/lno.11615

Hood, E., Fellman, J. B., & Spencer, R. G. M. (2020). Glacier Loss Impacts Riverine Organic Carbon Transport to the Ocean. Geophysical Research Letters, 47. doi:doi.org/10.1029/2020GL089804

Zhou, Y., Liu, M. Y., Zhou, L., Jang, K. S., Xu, H., Shi, K., Zhu, G., Liu, M., Deng, J., Zhang, Y., Spencer, R. G. M., Kothawala, D. N., Jeppesen, E., & Wu, F. (2020). Rainstorm events shift the molecular composition and export of dissolved organic matter in a large drinking water reservoir in China: High frequency buoys and field observations. Water Research. doi:doi.org/10.1016/j.watres.2020.116471

Kuhn, C., Bogard, M., Johnston, S. E., John, A., Vermote, E., Spencer, R. G. M., Dornblaser, M., Wickland, K., Striegl, R., & Butman, D. (2020). Satellite and airborne remote sensing of gross primary productivity in boreal Alaskan lakes. Environmental Research Letters. doi:doi.org/10.1088/1748-9326/aba46f

Fellman, J. B., Hood, E., Behnke, M. I., Welker, J. M., & Spencer, R. G. M. (2020). Stormflows Drive Stream Carbon Concentration, Speciation, and Dissolved Organic Matter Composition in Coastal Temperate Rainforest Watersheds. Journal of Geophysical Research Biogeosciences, 125. doi:doi.org/10.1029/2020JG005804

Zherebker, A., Kim, S., Schmitt-Kopplin, P., Spencer, R. G. M., Lechtenfeld, O., Podgorski, D. C., Hertkorn, N., Harir, M., Nurfajin, N., Koch, B., Nikolaev, E. N., Shirshin, E. A., Berezin, S. A., Kats, D. S., Rukhovich, G. D., & Perminova, I. (2020). Interlaboratory comparison of humic substances compositional space as measured by Fourier transform ion cyclotron resonance mass spectrometry. Pure and Applied Chemistry, 92. doi:doi.org/10.1515/pac-2019-0809

Casas-Ruiz, J. P., Spencer, R. G. M., Guillemette, F., von Schiller, D., Obrador, B., Podgorski, D. C., Kellerman, A. M., Hartmann, J., Gomez-Gener, L., Sabater, S., & Marce, R. (2020). Delineating the continuum of dissolved organic matter in temperate river networks. Global Biogeochemical Cycles, 34. Retrieved from doi.org/10.1029/2019GB006495

Drake, T. W., Wagner, S., Stubbins, A., Wabakanghanzi, J. N., Dinga, J. B., Six, J., & Spencer, R. G. M. (2020). Du feu à l'eau: source and flux of dissolved black carbon from the Congo River. Global Biogeochemical Cycles. Retrieved from doi.org/10.1029/2020GB006560

Leewis, M. C., Berlemont, R., Podgorski, D. C., Srinivas, A., Zito, P., Spencer, R. G. M., McFarland, J., Douglas, T. A., Conaway, C. H., Waldrop, M., & Mackelprang, R. (2020). Life at the Frozen Limit: Microbial Carbon Metabolism Across a Late Pleistocene Permafrost Chronosequence. Frontiers in Microbiology, 11. Retrieved from doi.org/10.3389/fmicb.2020.01753

Rodriguez-Cardona, B. M., Coble, A. A., Wymore, A. S., Kolosov, R., Podgorski, D. C., Zito, P., Spencer, R. G. M., Prokushkin, A. S., & McDowell, W. H. (2020). Wildfires lead to decreased carbon and increased nitrogen concentrations in upland arctic streams. Scientific Reports, 10. Retrieved from doi.org/10.1038/s41598-020-65520-0

Kellerman, A. M., Hawkings, J. R., Wadham, J. L., Kohler, T. J., Stibal, M., Grater, E., Marshall, M., Hatton, J. E., Beaton, A., & Spencer, R. G. M. (2020). Glacier Outflow Dissolved Organic Matter as a Window Into Seasonally Changing Carbon Sources: Leverett Glacier, Greenland. Journal of Geophysical Research Biogeosciences, 125. doi:doi.org/10.1029/2019JG005161

McDonough, L. K., Rutlidge, H., O'Carrol, D. M., Andersen, M. S., Meredith, K., Behnke, M. I., Spencer, R. G. M., McKenna, A. M., Marjo, C. E., Oudone, P., & Baker, A. (2020). Characterisation of shallow groundwater dissolved organic matter in aeolian, alluvial and fractured rock aquifers. Geochimica et Cosmochimica Acta, 273, 163-176.

Connolly, C. T., Cardenas, M. B., Burkart, G. A., Spencer, R. G. M., & McClelland, J. W. (2020). Groundwater as a major source of dissolved organic matter to Arctic coastal waters. Nature Communications, 11, 1479. Retrieved from doi.org/10.1038/s41467-020-15250-8

Zolkos, S., Krabbenhoft, D. P., Suslova, A., Tank, S. E., McClelland, J. W., Spencer, R. G. M., Shiklomanov, A., Zhulidov, A. V., Gurtovaya, T., Zimov, N., Zimov, S., Mutter, E. A., Kutny, L., Amos, E., & Holmes, R. M. (2020). Mercury export from Arctic great rivers. Environmental Science & Technology, 54, 4140-4148. Retrieved from https://doi.org/10.1021/acs.est.9b07145

Eckard, R. S., Bergamaschi, B. A., Pellerin, B., Spencer, R. G. M., Dyda, R., & Hernes, P. J. (2020). Organic Matter Integration, Overprinting, and the Relative Fraction of Optically Active Organic Carbon in a Human-Impacted Watershed. Frontiers in Earth Science, 8. Retrieved from doi.org/10.3389/feart.2020.00067

Carey, J. C., Gewirtzman, J., Johnston, S. E., Kurtz, A., Tang, J., Vieillard, A. M., & Spencer, R. G. M. (2020). Arctic River Dissolved and Biogenic Silicon Exports—Current Conditions and Future Changes With Warming. Global Biogeochemical Cycles, 34, 3. Retrieved from doi.org/10.1029/2019GB006308

McDonough, L. K., O'Carroll, D. M., Meredith, K., Andersen, M. S., Brugger, C., Huang, H., Rutlidge, H., Behnke, M. I., Spencer, R. G. M., McKenna, A., Marjo, C. E., Oudone, P., & Baker, A. (2020). Changes in groundwater dissolved organic matter character in a coastal sand aquifer due to rainfall recharge. Water Research, 169, 115201.

Johnston, S. E., Striegl, R. G., Bogard, M. J., Dornblaser, M. M., Butman, D. E., Kellerman, A. M., Wickland, K. P., Podgorski, D. C., & Spencer, R. G. M. (2020). Hydrologic connectivity determines dissolved organic matter biogeochemistry in northern high‐latitude lakes. Limnology & Oceanography. Retrieved from doi: 10.1002/lno.11417

Zito, P., Podgorski, D. C., Bartges, T., Guillemette, F., Roebuck, J. A., Spencer, R. G. M., Rodgers, R. P., & Tarr, M. A. (2020). Sunlight induced molecular progression of oil into oxidized oil soluble species, interfacial material, and dissolved organic matter. Energy & Fuels. Retrieved from DOI: 10.1021/acs.energyfuels.9b04408

Zhou, Y., Zhou, L., Zhang, Y., de Souza, G. C., Podgorski, D. C., Spencer, R. G. M., Jeppesen, E., & Davidson, T. A. (2019). Autochthonous dissolved organic matter potentially fuels methane ebullition from experimental lakes. Water Research, 166, 115048.

Johnston, S. E., Bogard, M. J., Rogers, J. A., Butman, D., Striegl, R. G., Dornblaser, M. M., & Spencer, R. G. M. (2019). Constraining dissolved organic matter sources and temporal variability in a model sub-Arctic lake. Biogeochemistry, 146, 271-292.

Kellerman, A. M., Arellano, A., Podgorski, D. C., Martin, E. E., Martin, J. B., Deuerling, K. M., Bianchi, T. S., & Spencer, R. G. M. (2019). Fundamental drivers of dissolved organic matter composition across an Arctic effective precipitation gradient. Limnology & Oceanography. doi:doi: 10.1002/lno.11385

Wagner, S., Brandes, J., Spencer, R. G. M., Ma, K., Rosengard, S. Z., Moura, J. M. S., & Stubbins, A. (2019). Isotopic composition of oceanic dissolved black carbon reveals non-riverine source. Nature Communications, 10, 5064.

Drake, T. W., Podgorski, D. C., Dinga, B., Chanton, J., Six, J., & Spencer, R. G. M. (2019). Land‐use controls on carbon biogeochemistry in lowland streams of the Congo Basin. Global Change Biology. Retrieved from doi.org/10.1111/gcb.14889

Harfmann, J. L., Guillemette, F., Kaiser, K., Spencer, R. G. M., Chuang, C. Y., & Hernes, P. J. (2019). Convergence of terrestrial dissolved organic matter composition and the role of microbial buffering in aquatic ecosystems. Journal of Geophysical Research Biogeosciences, 124, JG004997.

Textor, S. E., Wickland, K. P., Podgorski, D. C., Johnston, S. E., & Spencer, R. G. M. (2019). Dissolved organic carbon turnover in permafrost-influenced watersheds of Interior Alaska: Molecular insights and the priming effect. Frontiers in Earth Science, 7, 275.

Zhou, Y., Zhou, L., He, X., Jang, K. S., Yao, X., Hu, Y., Zhang, Y., Li, X., Spencer, R. G. M., Brookes, J. D., & Jeppesen, E. (2019). Variability in dissolved organic matter composition and biolability across gradients of glacial coverage and distance from glacial terminus on the Tibetan Plateau. Environmental Science & Technology, 53, 12207-12217.

Wadham, J. L., Hawkings, J. R., Tarasov, L., Gregoire, L. J., Spencer, R. G. M., Gutjahr, M., Ridgwell, A., & Kohfeld, K. E. (2019). Ice sheets matter for the global carbon cycle. Nature Geoscience, 10, 3567.

Bogard, M. J., Johnston, S. E., Dornblaser, M. M., Spencer, R. G. M., Striegl, R. G., & Butman, D. E. (2019). Extreme rates and diel variability of planktonic respiration in a shallow sub-arctic lake. Aquatic Sciences, 81, 60-68.

Zherebker, A., Podgorski, D. C., Kholodov, V. A., Orlov, A. A., Yaroslavtseva, O., Kharybin, A., Kholodov, V., Spector, V., Spencer, R. G. M., Nikolaev, E., & Perminova, I. (2019). The molecular composition of humic substances isolated from Yedoma permafrost and Alas cores in the Eastern Siberian Arctic as measured by ultrahigh resolution mass spectrometry. Journal of Geophysical Research Biogeosciences, 124.

Spencer, R. G. M., Kellerman, A., Podgorski, D. C., Macedo, M. N., Jankowski, K. J., Nunes, D., & Neill, C. (2019). Identifying the molecular signatures of agricultural expansion in Amazonian headwater streams. Journal of Geophysical Research Biogeosciences, 124, 1637-1650.

Heslop, J. K., Winkel, M., Walter-Anthony, K., Spencer, R. G. M., Podgorski, D. C., Zito, P., Zholodov, A., Zhang, M., & Liebner, S. (2019). Increasing organic carbon biolability with depth in yedoma permafrost: ramifications for future climate change. Journal of Geophysical Research Biogeosciences. doi:https://doi.org/10.1029/2018JG004712

Drake, T. W., Van Oost, K., Barthel, M., Hoyt, A. M., Podgorski, D. C., Six, J., Boeckx, P., Trumbore, S. E., Ntaboba, L. C., & Spencer, R. G. M. (2019). Mobilization of aged and biolabile soil carbon by tropical deforestation. Nature Geoscience, 12, 541-546.

Zito, P., Podgorski, D. C., Johnson, J., Chen, H., Rodgers, R. P., Guillemette, F., Kellerman, A. M., Spencer, R. G. M., & Tarr, M. A. (2019). The molecular-level composition and acute toxicity of photosolubilized petrogenic carbon. Environmental Science & Technology, 53, 8235-8243.

Zhou, L., Zhou, Y., Yang, H., Jian, C., Liu, X., Bai, C., Tang, X., Zhang, Y., Jang, K. S., Spencer, R. G. M., & Jeppesen, E. (2019). Microbial production and consumption of dissolved organic matter in glacial ecosystems on the Tibetan Plateau. Water Research, 160, 18-28.

Zhou, Y., Li, Y., Yao, X., Ding, W., Zhang, Y., Jeppesen, E., Podgorski, D. C., Chen, C., Ding, Y., Wu, H., & Spencer, R. G. M. (2019). Response of chromophoric dissolved organic matter dynamics to tidal oscillations and anthropogenic disturbances in a large subtropical estuary. Science of the Total Environment, 662, 769-778.

Yates, C. A., Johnes, P. J., & Spencer, R. G. M. (2019). Characterisation of treated effluent from four commonly employed wastewater treatment facilities: A UK case study. Journal of Environmental Management, 232, 919-927.

Bogard, M. J., Kuhn, C. D., Johnston, S. E., Striegl, R. G., Holtgrieve, G. W., Dornblaser, M. M., Spencer, R. G. M., Wickland, K. P., & Butman, D. E. (2019). Negligible cycling of terrestrial carbon in many lakes of the arid circumpolar landscape. Nature Geoscience, 12, 180–185.

Hemingway, J. D., Spencer, R. G. M., Podgorski, D. C., Zito, P., Sen, I. S., & Galy, V. V. (2019). Glacier meltwater and monsoon precipitation drive Upper Ganges Basin dissolved organic matter composition. Geochimica et Cosmochimica Acta, 244, 216-228. doi:doi.org/10.1016/j.gca.2018.10.012

Zhou, Y., Xiao, Q., Yao, X., Zhang, Y., Zhang, M., Shi, K., Lee, X., Podgorski, D. C., Qin, B., Spencer, R. G. M., & Jeppesen, E. (2018). Accumulation of terrestrial dissolved organic matter potentially enhances dissolved methane levels in eutrophic lake Taihu, China. Environmental Science & Technology, 52, 10297-10306. Retrieved from https://pubs.acs.org/doi/abs/10.1021/acs.est.8b02163 doi:10.1021/acs.est.8b02163

Textor, S. R., Guillemette, F., Zito, P., & Spencer, R. G. M. (2018). An assessment of dissolved organic carbon biodegradability and priming in blackwater systems. Journal of Geophysical Research: Biogeosciences, 123. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018JG004470 doi:doi.org/10.1029/2018JG004470

Bao, H., Yi, Y., Wang, C., Spencer, R. G. M., Deng, X., & Guo, W. (2018). Dissolved organic matter in coastal rainwater: Concentration, bioavailability and depositional flux to seawater in southeastern China. Marine Chemistry, 205, 48-55. Retrieved from https://www.sciencedirect.com/science/article/pii/S0304420318301129 doi:doi.org/10.1016/j.marchem.2018.07.008

Luzius, C., Guillemette, F., Podgorski, D. C., Kellerman, A. M., & Spencer, R. G. M. (2018). Drivers of dissolved organic matter in the vent and major conduits of the world's largest freshwater spring. Journal of Geophysical Research: Biogeosciences, 123, 2775-2790. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2017JG004327 doi:doi.org/10.1029/2017JG004327

Podgorski, D. C., Zito, P., McGuire, J. T., Martinovic-Weigelt, D., Cozzarelli, I. M., Bekins, B. A., & Spencer, R. G. M. (2018). Examining natural attenuation and acute toxicity of petroleum-derived dissolved organic matter with optical spectroscopy. Environmental Science & Technology. Retrieved from https://pubs.acs.org/doi/abs/10.1021/acs.est.8b00016 doi:10.1021/acs.est.8b00016

Johnston, S. E., Shorina, N., Bulygina, E., Vorobjeva, T., Chupakova, A., Klimov, S. A., Kellerman, A. M., Guillemette, F., Shiklomanov, A., Podgorski, D. C., & Spencer, R. G. M. (2018). Flux and seasonality of dissolved organic matter from the Northern Dvina (Severnaya Dvina) River, Russia. Journal of Geophysical Research: Biogeosciences, 123, 1041-1056. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JG004337 doi:10.1002/2017JG004337

Bauters, M., Drake, T. W., Verbeeck, H., Bode, S., Herve-Fernandez, P., Zito, P., Podgorski, D. C., Boyemba, F., Makelele, I., Ntaboba, L. C., Spencer, R. G. M., & Boeckx, P. (2018). High fire-derived nitrogen deposition on central African forests. Proceedings of the National Academy of Sciences, 115, 549-554. Retrieved from https://www.pnas.org/content/115/3/549.short doi:doi:10.1073/pnas.1714597115

Drake, T. W., Tank, S. E., Zhulidov, A. V., Holmes, R. M., Gurtovaya, T., & Spencer, R. G. M. (2018). Increasing alkalinity export from large Russian rivers. Environmental Science & Technology, 52, 8302-8308. Retrieved from https://pubs.acs.org/doi/abs/10.1021/acs.est.8b01051 doi:10.1021/acs.est.8b01051

Drake, T. W., Holmes, R. M., Zhulidov, A. V., Gurtovaya, T., Raymond, P. A., McClelland, J. W., & Spencer, R. G. M. (2018). Multi-decadal climate-induced changes in arctic tundra lake geochemistry and geomorphology. Limnology and Oceanography. Retrieved from https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.11015 doi:doi.org/10.1002/lno.11015

Wang, Y., Xu, Y., Spencer, R. G. M., Zito, P., Kellerman, A., Podgorski, D. C., Xiao, W., Wei, D., Rashid, H., & Yang, Y. (2018). Selective leaching of dissolved organic matter from alpine permafrost soils on the Qinghai‐Tibetan Plateau. Journal of Geophysical Research: Biogeosciences, 123, 1005-1016. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017JG004343 doi:10.1002/2017JG004343

Wang, Y., Spencer, R. G. M., Podgorski, D. C., Kellerman, A. M., Rashid, H., Zito, P., Xiao, W., Wei, D., Yang, Y., & Xu, Y. (2018). Spatiotemporal transformation of dissolved organic matter along an alpine stream flowpath on the Qinghai-Tibetan Plateau: importance of source and permafrost degradation. Biogeosciences, 15, 6637–6648. Retrieved from https://www.biogeosciences.net/15/6637/2018/bg-15-6637-2018-discussion.html doi:doi.org/10.5194/bg-15-6637-2018

Burke, A., Present, T. M., Paris, G., Rae, E. C. M., Sandilands, B. H., Gaillardet, J., Peucker-Ehrenbrink, B., Fischer, W. W., McClelland, J,W., Spencer, R. G. M., Voss, B. M., & Adkins, J. F. (2018). Sulfur isotopes in rivers: Insights into global weathering budgets, pyrite oxidation, and the modern sulfur cycle. Earth and Planetary Science Letters, 496, 168-177. Retrieved from https://www.sciencedirect.com/science/article/pii/S0012821X18302991 doi:doi.org/10.1016/j.epsl.2018.05.022

Drake, T. W., Guillemette, F., Hemingway, J. D., Chanton, J. P., Podgorski, D. C., Zimov, N. S., & Spencer, R. G. M. (2018). The ephemeral signature of permafrost carbon in an arctic fluvial network. Journal of Geophysical Research: Biogeosciences, 123. Retrieved from https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2017JG004311 doi:10.1029/2017JG004311

Kellerman, A. K., Guillemette, F., Podgorski, D. C., Aiken, G. R., Butler, K. D., & Spencer, R. G. M. (2018). Unifying concepts linking dissolved organic matter composition to persistence in aquatic ecosystems. Environmental Science & Technology, 52, 2538-2548. Retrieved from https://pubs.acs.org/doi/abs/10.1021/acs.est.7b05513 doi:DOI:10.1021/acs.est.7b05513

Eckard, R. S., Pellerin, B. A., Bergamaschi, B. A., Bachand, P. A. M., Bachand, S. M., Spencer, R. G. M., & Hernes, P. J. (2017). Dissolved organic matter compositional change and biolability during two storm runoff events in a small agricultural watershed. Journal of Geophysical Research-Biogeosciences, 122, 2634-2650.

Shmelev, D., Veremeeva, A., Kraev, G., Kholodov, A., Spencer, R. G. M., Walker, W. S., & Rivkina, E. (2017). Estimation and sensitivity of carbon storage in permafrost of North‐Eastern Yakutia. Permafrost and Periglacial Processes, 12. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/ppp.1933/full doi:10.1002/ppp.1933

Hemingway, J. D., Schefuss, E., Spencer, R. G. M., Dinga, J. B., Eglinton, T. I., McIntrye, C., & Galy, V. V. (2017). Hydrologic controls on seasonal and inter-annual variability of Congo River particulate organic matter source and reservoir age. Chemical Geology, 466, 454-465.

Zhou, Y., Ma, Y., Zhang, Y., Qin, B., Jeppesen, E., Shi, K., Brookes, J. D., Spencer, R. G. M., Zhu, G., & Gao, G. (2017). Improving water quality in China: Environmental investment pays dividends. Water Research, 118, 152-159.

Matiasek, S. J., Pellerin, B. A., Spencer, R. G. M., Bergamaschi, B. A., & Hernes, P. J. (2017). Irrigation as a fuel pump to freshwater ecosystems. Biogeochemistry, 136, 71-90.

Stubbins, A., Mann, P. J., Powers, L., Dittmar, T., McIntyre, C., Eglinton, T. I., Zimov, N., & Spencer, R. G. M. (2017). Low photolability of yedoma permafrost dissolved organic carbon. Journal of, 122, 12. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2016JG003688/full doi:10.1002/2016JG003688

Guillemette, F., Bianchi, T. S., & Spencer, R. G. M. (2017). Old before your time: Ancient carbon incorporation in contemporary aquatic foodwebs. Limnology and Oceanography, 1-19. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/lno.10525/full doi:10.1002/lno.10525

Wagner, S., Brandes, J., Goranov, V., Drake, T. W., Spencer, R. G. M., & Stubbins, A. (2017). Online quanitification and compound-specific stable isotopic analysis of black carbon in environmental matrices via liquid chromatography-isotope ratio mass spectrometry. Limnology and Oceanography: Methods, doi: 10.1002/lom3.10.

Pelletier, A. R., Castello, L., Zhulidov, A. V., Gurtovaya, T. Y., Robarts, R. D., Holmes, R. M., Zhulidov, D. A., & Spencer, R. G. M. (2017). Temporal and longitudinal mercury trends in burbot (Lota lota) in the Russian Arctic. Environmental Science & Technology, 51, 13436-13442.

Drake, T. W., Raymond, P. A., & Spencer, R. G. M. (2017). Terrestrial carbon inputs to inland waters: A current synthesis of estimates and uncertainty. Limnology and Oceanography Letters, doi: 10.1002/lol2.10.

Hernes, P. J., Spencer, R. G. M., Dyda, R. Y., O'Geen, A. T., & Dahlgren, R. A. (2017). The genesis and exodus of vascular plant DOM from an oak woodland landscape. Frontiers in Earth Science, 5, 17. Retrieved from http://journal.frontiersin.org/article/10.3389/feart.2017.00009/full doi:https://doi.org/10.3389/feart.2017.00009

Medeiros, P., Seidel, M., Niggemann, J., Spencer, R. G. M., Hernes, P. J., Yager, P. L., Miller, W. L., Dittmar, T., & Hansell, D. A. (2016). A novel molecular approach for tracing terrigenous dissolved organic matter into the deep ocean. Global Biogeochemical Cycles, 30, 689-700. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2015GB005320/full doi:10.1002/2015GB005320

Yates, C. A., Johnes, P. J., & Spencer, R. G. M. (2016). Assessing the drivers of dissolved organic matter export from two contrasting lowland catchments, U.K. Science of The Total Environment, 569-570, 10. Retrieved from http://www.sciencedirect.com/science/article/pii/S0048969716314000 doi:10.1016/j.scitotenv.2016.06.211

Abbott, B. W., and 99 co-authors inc., & Spencer, R. G. M. (2016). Biomass offsets little or none of permafrost carbon release from soils, streams, and wildfire: an expert assessment. Environmental Research Letters, 11, 034014. Retrieved from http://iopscience.iop.org/article/10.1088/1748-9326/11/3/034014 doi:10.1088/1748-9326/11/3/034014

O'Donnell, J. A., Aiken, G. R., Butler, K. D., Guillemette, F., Podgorski, D. C., & Spencer, R. G. M. (2016). DOM composition and transformation in boreal forest soils: The effects of temperature and organic-horizon decomposition state. Journal of Geophysical Research: Biogeosciences, 121, 2727-2744. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2016JG003431/full

Oliver, A. A., Spencer, R. G. M., Deas, M. L., & Dahlgren, R. A. (2016). Impacts of seasonality and anthropogenic impoundments on dissolved organic matter dynamics in the Klamath River (Oregon/California, USA). Journal of Geophysical Research-Biogeosciences, 121, 1946-1958. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2016JG003497/full doi:10.1002/2016JG003497

Riedel, T., Zark, M., Vahatalo, A., Niggemann, J., Spencer, R. G. M., Hernes, P. J., & Dittmar, T. (2016). Molecular signatures of biogeochemical transformations in dissolved organic matter from ten World Rivers. Frontiers in Earth Science, 4, 11. doi:doi:10.3389/feart.2016.00085

Cao, X., Aiken, G. R., Spencer, R. G. M., Butler, K. D., Mao, J., & Schmidt-Rohr, K. (2016). Novel insights from NMR spectroscopy into seasonal changes in the composition of dissolved organic matter exported to the Bering Sea by the Yukon River. Geochimica et Cosmochimica Acta, 181, 72-88. Retrieved from http://www.sciencedirect.com/science/article/pii/S0016703716300758 doi:0.1016/j.gca.2016.02.029

Alsdorf, D., Beighley, E., Laraque, A., Lee, H., Tshimanga, R., O'Loughlin, F., Mahe, G., Dinga, B., Moukandi, G., & Spencer, R. G. M. (2016). Opportunities for hydrologic research in the Congo Basin. Reviews of Geophysics, 54, 1-32. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2016RG000517/full doi:10.1002/2016RG000517

Spencer, R. G. M., Hernes, P. J., Dinga, B., Wabakanghanzi, J. N., Drake, T. W., & Six, J. (2016). Origins, seasonality and fluxes of organic matter in the Congo River. Global Biogeochemical Cycles, 30, 1105-1121. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2016GB005427/full doi:10.1002/2016GB005427

Mann, P. J., Spencer, R. G. M., Hernes, P. J., Six, J., Aiken, G. R., Tank, S. E., McClelland, J. W., Butler, K. D., Dyda, R. Y., & Holmes, R. M. (2016). Pan-arctic trends in terrestrial dissolved organic matter from optical measurements. Frontiers in Earth Science, 4, 25. Retrieved from http://journal.frontiersin.org/article/10.3389/feart.2016.00025/full doi:http://dx.doi.org/10.3389/feart.2016.000

McClelland, J. W., Holmes, R. M., Peterson, B. J., Raymond, P. A., Striegl, R. G., Zhuildov, A. V., Zimov, S. A., Zimov, N., Spencer, R. G. M., Staples, R., Gurtovaya, T. Y., & Griffin, C. G. (2016). Particulate organic carbon and nitrogen export from major Arctic rivers. Global Biogeochemical Cycles, 30, 629-643. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2015GB005351/full doi:10.1002/2015GB005351

Bittar, T. B., Berger, S. A., Birsa, L. M., Walters, T. L., Thompson, M. E., Spencer, R. G. M., Mann, E. L., Stubbins, A., Frischer, M. E., & Branders, J. A. (2016). Seasonal dynamics of dissolved, particulate and microbial components of a tidal saltmarsh-dominated estuary under contrasting levels of freshwater discharge. Estuarine, Coastal and Shelf Science, 182, 72-85. Retrieved from http://www.sciencedirect.com/science/article/pii/S0272771416303018

Bischoff, J., Sparkes, R. B., Selver, A. D., Spencer, R. G. M., Gustafsson, O., Semiletov, I. P., Dudarev, O. P., Wagner, D., Rivkina, E., van Dongen, B. E., & Talbot, H. M. (2016). Source, transport and fate of soil organic matter inferred from microbial biomarker lipids on the East Siberian Arctic Shelf. Biogeosciences, 13, 11. doi:doi:10.5194/bg-13-4899-2016

Henchiri, S., Gaillardet, J., Dellinger, M., Bouchez, J., & Spencer, R. G. M. (2016). Temporal variations of dissolved lithium isotopic signatures in rivers reveal contrasted weathering regimes in low-relief Central African settings. Geophysical Research Letters, 43, 4391-4399. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2016GL067711/abstract doi:10.1002/2016GL067711

Sun, L., Spencer, R. G. M., Hernes, P. J., Dyda, R., & Mopper, K. (2015). A comparison of a simplified cupric oxide oxidation HPLC method with the traditional GC-MS method for characterization of lignin phenolics in environmental samples. Limnology and Oceanography: Methods, 13, 1-8. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/lom3.10001/full doi:10.1002/lom3.10001

Drake, T. W., Wickland, K. P., Spencer, R. G. M., McKnight, D. M., & Striegl, R. G. (2015). Ancient low-molecular-weight organic acids in permafrost fuel rapid carbon dioxide production upon thaw. Proceedings of the National Academy of Sciences, 112, 13946-13951. Retrieved from http://www.pnas.org/content/112/45/13946.full doi:10.1073/pnas.1511705112

Logvinova, C. L., Frey, K. E., Mann, P. J., Stubbins, A., & Spencer, R. G. M. (2015). Assessing the potential impacts of declining sea ice cover on the photochemical degradation of dissolved organic matter in the Chukchi and Beaufort Seas. Journal of Geophysical Research: Biogeosciences, 11, 2326-2344. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2015JG003052/full doi:10.1002/2015JG003052

Spencer-Jones, C. L., Wagner, T., Dinga, B. J., Schefuss, E., Mann, P. J., Poulsen, J. R., Spencer, R. G. M., Wabakanghanzi, J. N., & Talbot, H. M. (2015). Bacteriohopanepolyols in tropical soils and sediments from the Congo River catchment area. Organic Geochemistry, 89, 1-13. Retrieved from http://www.sciencedirect.com/science/article/pii/S014663801500176X doi:10.1016/j.orggeochem.2015.09.003

Vonk, J. E., Tank, S. E., Mann, P. J., Spencer, R. G. M., Treat, C. C., Striegl, R. G., Abbott, B. W., & Wickland, K. P. (2015). Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis. Biogeosciences, 12, 6915-6930. Retrieved from http://www.biogeosciences.net/12/6915/2015/

McClelland, J. W., Tank, S. E., Spencer, R. G. M., & Shiklomanov, A. I. (2015). Coordination and sustainability of river observing activities in the Arctic. Arctic, 68, 1-10. Retrieved from http://arctic.journalhosting.ucalgary.ca/arctic/index.php/arctic/article/view/4448

Spencer, R. G. M., Mann, P. J., Dittmar, T., Eglinton, T. I., McIntyre, C., Holmes, R. M., Zimov, N., & Stubbins, A. (2015). Detecting the signature of permafrost thaw in Arctic rivers. Geophysical Research Letters, 42, 2830–2835. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2015GL063498/full doi:doi:10.1002/2015GL063498

Voss, B. M., Peucker-Ehrenbrink, B., Eglinton, T. I., Spencer, R. G. M., Bulygina, E., Galy, V., Lamborg, C. H., Ganguli, P. M., Montlucon, D. B., Marsh, S., Gillies, S. L., Fanslau, J., Epp, A., & Luymes, R. (2015). Seasonal hydrology drives rapid shifts in the flux and composition of dissolved and particulate organic carbon and major and trace ions in the Fraser River, Canada. Biogeosciences, 12, 5597-5618. Retrieved from http://www.biogeosciences.net/12/5597/2015/ doi:10.5194/bg-12-5597-2015

Fellman, J. B., Hood, E., Raymond, P. A., Stubbins, A., & Spencer, R. G. M. (2015). Spatial variation in the origin of dissolved organic carbon in snow on the Juneau Icefield, southeast Alaska. Environmental Science & Technology, 49, 11492-11499. Retrieved from http://pubs.acs.org/doi/full/10.1021/acs.est.5b02685

Hood, E., Battin, T. J., Fellman, J., O'Neel, S., & Spencer, R. G. M. (2015). Storage and release of organic carbon from glaciers and ice sheets. Nature Geoscience, 68, 91-96. Retrieved from http://www.nature.com/ngeo/journal/v8/n2/full/ngeo2331.html doi:10.1038/ngeo2331

Mann, P. J., Eglinton, T. I., McIntyre, C. P., Zimov, N., Davydova, A., Vonk, J. E., Holmes, R. M., & Spencer, R. G. M. (2015). Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks. Nature Communications, 6, 7856. Retrieved from http://www.nature.com/ncomms/2015/150724/ncomms8856/full/ncomms8856.html doi:doi:10.1038/ncomms8856

Stubbins, A., Spencer, R. G. M., Mann, P. J., Holmes, R. M., McClelland, J., Niggemann, J., & Dittmar, T. (2015). Utilizing colored dissolved organic matter to derive dissolved black carbon export by Arctic rivers. Frontiers in Earth Science, 3, 63. Retrieved from http://journal.frontiersin.org/article/10.3389/feart.2015.00063/full doi:http://dx.doi.org/10.3389/feart.2015.000

Fellman, J. B., Spencer, R. G. M., Raymond, P. A., Pettit, N. E., Skrzypek, G., Hernes, P. J., & Grierson, P. F. (2014). Dissolved organic carbon biolability decreases along with its modernization in fluvial networks in an ancient landscape. Ecology, 95, 2622-2632. Retrieved from http://onlinelibrary.wiley.com/doi/10.1890/13-1360.1/abstract doi:10.1890/13-1360.1

Mann, P. J., Sobczak, W. V., LaRue, M. M., Bulygina, E., Davydova, A., Vonk, J. E., Schade, J., Davydov, S., Zimov, N., Holmes, R. M., & Spencer, R. G. M. (2014). Evidence for key enzymatic controls on metabolism of Arctic river organic matter. Global Change Biology, 20, 1089-1100. Retrieved from http://onlinelibrary.wiley.com/doi/10.1111/gcb.12416/full doi:10.1111/gcb.12416

Aiken, G. R., Spencer, R. G. M., Striegl, R. G., Schuster, P. F., & Raymond, P. A. (2014). Influences of glacier melt and permafrost thaw on the age of dissolved organic carbon in the Yukon River basin. Global Biogeochemical Cycles, 28, 525-537. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2013GB004764/full doi:10.1002/2013GB004764

Jex, C. N., Pate, G. H., Blyth, A. J., Spencer, R. G. M., Hernes, P. J., Khan, S. J., & Baker, A. (2014). Lignin biogeochemistry: from modern processes to Quaternary archives. Quaternary Science Reviews, 87, 46-59. Retrieved from http://www.sciencedirect.com/science/article/pii/S027737911300509X doi:10.1016/j.quascirev.2013.12.028

Helms, J., Mao, J., Stubbins, A., Schmidt-Rohr, K., Spencer, R. G. M., Hernes, P. J., & Mopper, K. (2014). Loss of optical and molecular indicators of terrigenous dissolved organic matter during long-term photobleaching. Aquatic Sciences, 76, 353-373. Retrieved from http://link.springer.com/article/10.1007%2Fs00027-014-0340-0 doi:10.1007/s00027-014-0340-0

Castello, L., Zhulidov, A. V., Gurtovaya, T. Y., Robarts, R. D., Holmes, R. M., Zhulidov, D. A., Lysenko, V. S., & Spencer, R. G. M. (2014). Low and declining mercury in Arctic Russian rivers. Environmental Science & Technology, 48, 747-752. Retrieved from http://pubs.acs.org/doi/abs/10.1021/es403363v doi:10.1021/es403363v

Pereira, R., Bovolo, I. C., Spencer, R. G. M., Hernes, P. J., Tipping, E., Vieth-Hillebrand, A., Pedentchouk, N., Chappell, N. A., Parkin, G., & Wagner, T. (2014). Mobilization of optically invisible dissolved organic matter in response to rainstorm events in a tropical forest headwater river. Geophysical Research Letters, 41(4), 1202-1208. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2013GL058658/full doi:10.1002/2013GL058658

Marín-Spiotta, E., Gruley, K. E., Crawford, J., Atkinson, E. E., Miesel, J. R., Greene, S., Cardona-Correa, C., & Spencer, R. G. M. (2014). Paradigm shifts in soil organic matter research affect interpretations of aquatic carbon cycling: transcending disciplinary and ecosystem boundaries. Biogeochemistry, 117, 279-297. Retrieved from http://link.springer.com/article/10.1007%2Fs10533-013-9949-7 doi:10.1007/s10533-013-9949-7

Spencer, R. G. M., Vermilyea, A., Fellman, J., Raymond, P. A., Stubbins, A., Scott, D., & Hood, E. (2014). Seasonal variability of organic matter composition in an Alaskan glacier outflow: insights into glacier carbon sources. Environmental Research Letters, 9, 055005. Retrieved from http://iopscience.iop.org/article/10.1088/1748-9326/9/5/055005 doi:10.1088/1748-9326/9/5/

Spencer, R. G. M., Guo, W., Raymond, P. A., Dittmar, T., Hood, E., Fellman, J., & Stubbins, A. (2014). Source and biolability of ancient dissolved organic matter in glacier and lake ecosystems on the Tibetan Plateau. Geochimica et Cosmochimica Acta, 142, 64-74. Retrieved from http://www.sciencedirect.com/science/article/pii/S0016703714005018 doi:10.1016/j.gca.2014.08.006

Mann, P. J., Spencer, R. G. M., Dinga, B. J., Poulsen, J. R., Hernes, P. J., Fiske, G., Salter, M. E., Wang, Z. A., Hoering, K. A., Six, J., & Holmes, R. M. (2014). The biogeochemistry of carbon across a gradient of streams and rivers within the Congo Basin. Journal of Geophysical Research: Biogeosciences, 119, 687-702. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/2013JG002442/full doi:10.1002/2013JG002442

Talbot, H. M., Handley, L., Spencer-Jones, C. L., Dinga, B. J., Schefuss, E., Mann, P. J., Poulsen, J. R., Spencer, R. G. M., & Wagner, T. (2014). Variability in aerobic methane oxidation over the past 1.2 Myrs recorded in microbial biomarker signatures from Congo fan sediments. Geochimica et Cosmochimica Acta, 133, 387-401. Retrieved from http://www.sciencedirect.com/science/article/pii/S0016703714001446

Fellman, J. B., Hood, E., Spencer, R. G. M., Stubbins, A., & Raymond, P. A. (2014). Watershed glacier coverage influences dissolved organic matter biogeochemistry in coastal watersheds of southeast Alaska. Ecosystems, 17, 1014-1025. Retrieved from http://link.springer.com/article/10.1007%2Fs10021-014-9777-1 doi:10.1007/s10021-014-9777-1

Spencer, R. G. M., Aiken, G. R., Dornblaser, M. M., Butler, K. D., Holmes, R. M., Fiske, G., Mann, P. J., & Stubbins, A. (2013). Chromophoric dissolved organic matter export from US rivers. Geophysical Research Letters, 40, 1575-1579. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/grl.50357/full

Vonk, J. E., Mann, P. J., Dowdy, K. L., Davydova, A., Davydov, S. P., Zimov, N., Spencer, R. G. M., Bulygina, E. B., Eglinton, T. I., & Holmes, R. M. (2013). Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw. Environmental Research Letters, 8, 035023. Retrieved from http://iopscience.iop.org/article/10.1088/1748-9326/8/3/035023/meta doi:10.1088/1748-9326/8/3/035023

Hernes, P. J., Spencer, R. G. M., Dyda, R. Y., Pellerin, B. A., Bachand, P. A. M., & Bergamaschi, B. A. (2013). DOM composition in an agricultural watershed: Assessing patterns and variability in the context of spatial scales. Geochimica et Cosmochimica Acta, 121, 599-610. Retrieved from http://www.sciencedirect.com/science/article/pii/S0016703713004286

Jaffe, R., Ding, Y., Niggemann, J., Vahatalo, A. V., Stubbins, A., Spencer, R. G. M., Campbell, J., & Dittmar, T. (2013). Global charcoal mobilization from soils via dissolution and riverine transport to the oceans. Science, 340, 345-347. Retrieved from http://science.sciencemag.org/content/340/6130/345.full

Vonk, J. E., Mann, P. J., Davydov, S., Davydova, A., Spencer, R. G. M., Schade, J., Sobczak, W. V., Zimov, N., Zimov, S., Bulygina, E., Eglinton, T. I., & Holmes, R. M. (2013). High biolability of ancient permafrost carbon upon thaw. Geophysical Research Letters, 40, 2689-2693. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/grl.50348/full

Wang, Z. A., Dinga, B. J., Mann, P. J., Hoering, K. A., Poulsen, J. R., Spencer, R. G. M., & Holmes, R. M. (2013). Inorganic carbon speciation and fluxes in the Congo River. Geophysical Research Letters, 40(3), 511-516. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/grl.50160/full doi:10.1002/grl.50160

Huang, L., Zhuo, J., Guo, W., Spencer, R. G. M., Zhang, Z., & Xu, J. (2013). Tracing organic matter removal in polluted coastal waters via floating bed phytoremediation. Marine Pollution Bulletin, 71(1), 74-82. Retrieved from http://www.sciencedirect.com/science/article/pii/S0025326X13001720

Spencer, R. G. M., Hernes, P. J., Aufdenkampe, A. K., Baker, A., Gulliver, P., Stubbins, A., Aiken, G. R., Dyda, R. Y., Butler, K. D., Mwamba, V. L., Wabakanghanzi, J. N., & Six, J. (2012). An initial investigation into the organic matter biogeochemistry of the Congo River. Geochimica et Cosmochimica Acta, 84, 614-627. Retrieved from http://www.sciencedirect.com/science/article/pii/S0016703712000361

Stubbins, A., Hood, E., Raymond, P. A., Aiken, G. R., Sleighter, R. L., Hernes, P. J., Butman, D., Hatcher, P. G., Striegl, R. G., Schuster, P., Abulla, H. A. N., & Spencer, R. G. M. (2012). Anthropogenic aerosols as a source of ancient dissolved organic matter in glaciers. Nature Geoscience, 5, 198-201. Retrieved from http://www.nature.com/ngeo/journal/v5/n3/abs/ngeo1403.html

Wickland, K. P., Aiken, G. R., Butler, K., Dornblaser, M. M., Spencer, R. G. M., & Striegl, R. G. (2012). Biodegradability of dissolved organic carbon in the Yukon River and its tributaries: Seasonality and importance of inorganic nitrogen. Global Biogeochemical Cycles, 26(4), GB0E03. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2012GB004342/full doi:10.1029/2012GB004342

Krupa, M., Spencer, R. G. M., Tate, K. W., Six, J., Kessel, C. V., & Linquist, B. A. (2012). Controls on dissolved organic carbon composition and export from rice-dominated systems. Biogeochemistry, 108(1-3), 447-466. Retrieved from http://link.springer.com/article/10.1007%2Fs10533-011-9610-2

Mann, P. J., Davydova, A., Zimov, N., Spencer, R. G. M., Davydov, S., Bulygina, E., Zimov, S., & Holmes, R. M. (2012). Controls on the composition and lability of dissolved organic matter in Siberia's Kolyma River basin. Journal of Geophysical Research: Biogeosciences, 117(G1), G03001. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2011JG001798/full

Spencer, R. G. M., Butler, K. D., & Aiken, G. R. (2012). Dissolved organic carbon and chromophoric dissolved organic matter properties of rivers in the USA. Journal of Geophysical Research: Biogeosciences, 117(G3), G03001. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2011JG001928/full

Bouillon, S., Yambélé, A., Spencer, R. G. M., Gillikin, D. P., Hernes, P. J., Six, J., Merckx, R., & Borges, A. V. (2012). Organic matter sources, fluxes and greenhouse gas exchange in the Oubangui River (Congo River basin). Biogeosciences, 9, 2045-2062. Retrieved from http://www.biogeosciences.net/9/2045/2012/bg-9-2045-2012.html

Steenwerth, K. L., Pierce, D. L., Carlisle, E. A., Spencer, R. G. M., & Smart, D. R. (2010). A vineyard agroecosystem: Disturbance and precipitation affect soil respiration under Mediterranean conditions. Soil Science Society of America Journal, 74, 231-239. Retrieved from https://dl.sciencesocieties.org/publications/sssaj/abstracts/74/1/231

Spencer, R. G. M., Aiken, G. R., Dyda, R. Y., Butler, K. D., Bergamaschi, B. A., & Hernes, P. J. (2010). Comparison of XAD with other dissolved lignin isolation techniques and a compilation of analytical improvements for the analysis of lignin in aquatic settings. Organic Geochemistry, 41, 445-453. Retrieved from http://www.sciencedirect.com/science/article/pii/S014663801000029X

Fellman, J. B., Hood, E., & Spencer, R. G. M. (2010). Fluorescence spectroscopy opens new windows into dissolved organic matter dynamics in freshwater ecosystems: A review. Limnology and Oceanography, 55(6), 2452-2462. Retrieved from http://www.aslo.org/lo/toc/vol_55/issue_6/2452.html

Stubbins, A., Spencer, R. G. M., Chen, H., Hatcher, P. G., Mopper, K., Hernes, P. J., Mwamba, V. L., Wabakanghanzi, J. N., & Six, J. (2010). Illuminated darkness: the molecular signatures of Congo River dissolved organic matter and its photochemical alteration as revealed by ultrahigh precision mass spectrometry. Limnology and Oceanography, 55, 1467-1477. Retrieved from http://www.aslo.org/lo/toc/vol_55/issue_4/1467.html

Murphy, K. R., Butler, K. D., Spencer, R. G. M., Stedmon, C. A., Boehme, J. R., & Aiken, G. R. (2010). Measurement of dissolved organic matter fluorescence in aquatic environments: An interlaboratory comparison. Environmental Science & Technology, 44(24), 9405-9412. Retrieved from http://pubs.acs.org/doi/abs/10.1021/es102362t

Pellerin, B. A., Hernes, P. J., Saraceno, J. F., Spencer, R. G. M., & Bergamaschi, B. A. (2010). Microbial degradation of plant leachate alters lignin phenols and trihalomethane precursors. Journal of Environmental Quality, 39, 946-954. Retrieved from https://dl.sciencesocieties.org/publications/jeq/abstracts/39/3/946

Spencer, R. G. M., Hernes, P. J., Ruf, R., Baker, A., Dyda, R. Y., Stubbins, A., & Six, J. (2010). Temporal controls on dissolved organic matter and lignin biogeochemistry in a pristine tropical river, Democratic Republic of Congo. Journal of Geophysical Research: Biogeosciences, 115, 2005-2012. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2009JG001180/full doi:10.1029/2009JG001180

Fellman, J., Spencer, R. G. M., Hernes, P. J., Edwards, R., D'Amore, D., & Hood, E. (2010). The impact of glacier runoff on the biodegradability and chemical quality of terrigenous dissolved organic matter in near-shore marine ecosystems. Marine Chemistry, 121, 112-122. Retrieved from http://www.sciencedirect.com/science/article/pii/S0304420310000320

Pellerin, B. A., Downing, B. D., Kendall, C., Dahlgren, R. A., Kraus, T. E. C., Spencer, R. G. M., & Bergamaschi, B. A. (2009). Assessing the sources and magnitude of diurnal nitrate variability in the San Joaquin River (California) with an in-situ optical nitrate sensor and dual nitrate isotopes. Freshwater Biology, 54, 376-387. Retrieved from http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2427.2008.02111.x/abstract

Hernes, P. J., Bergamaschi, B. A., Eckard, R. S., & Spencer, R. G. M. (2009). Fluorescence-based proxies for lignin in freshwater dissolved organic matter. Journal of Geophysical Research – Biogeosciences, 114, G00F03. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2009JG000938/full doi:10.1029/2009JG000938

Hood, E., Fellman, J., Spencer, R. G. M., Hernes, P. J., Edwards, R., D'Amore, D., & Scott, D. (2009). Glaciers as a source of ancient, labile organic matter to the marine environment. Nature, 462, 1044-1047. Retrieved from http://www.nature.com/nature/journal/v462/n7276/full/nature08580.html doi:http://onlinelibrary.wiley.com/doi/10.10

Spencer, R. G. M., Stubbins, A., Hernes, P. J., Baker, A., Mopper, K., Aufdenkampe, A. K., Dyda, R. Y., Mwamba, V. L., Mangangu, A. M., Wabakanghanzi, J. N., & Six, J. (2009). Photochemical degradation of dissolved organic matter and dissolved lignin phenols from the Congo River. Journal of Geophysical Research – Biogeosciences, 114, G03010. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2009JG000968/full doi:10.1029/2009JG000 968

Spencer, R. G. M., Aiken, G. R., Butler, K. D., Dornblaser, M. M., Striegl, R. G., & Hernes, P. J. (2009). Utilizing chromophoric dissolved organic matter measurements to derive export and reactivity of dissolved organic carbon exported to the Arctic Ocean: A case study of the Yukon River, Alaska. Geophysical Research Letters, 36, L06401. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2008GL036831/full doi:10.1029/2008GL036831

Kraus, T. E. C., Bergamachi, B. A., Hernes, P. J., Spencer, R. G. M., Stepanauskas, R., Kendall, C., Losee, R., & Fujii, R. (2008). Assessing the contribution of wetlands and subsided islands to dissolved organic matter and disinfection byproduct precursors in the Sacramento-San Joaquin River Delta: A geochemical approach. Organic Geochemistry, 39, 1302-1318. Retrieved from http://www.sciencedirect.com/science/article/pii/S0146638008001630

Ahad, J. M. E., Barth, J. A. C., Ganeshram, R., Spencer, R. G. M., & Uher, G. (2008). Controls on carbon cycling in two contrasting temperate zone estuaries: the Tyne and Tweed, U.K. Estuarine, Coastal and Shelf Science, 78, 685-693. Retrieved from http://www.sciencedirect.com/science/article/pii/S0272771408000802

Spencer, R. G. M., Aiken, G. R., Wickland, K. P., Striegl, R. G., & Hernes, P. J. (2008). Seasonal and spatial variability in dissolved organic matter quantity and composition from the Yukon River Basin, Alaska. Global Biogeochemical Cycles, 22, GB4002. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2008GB003231/full doi:10.1029/2008GB003231

Baker, A., Bolton, L., Newson, M., & Spencer, R. G. M. (2008). Spectrophotometric properties of surface water dissolved organic matter in an afforested upland peat catchment. Hydrological Processes, 22, 2325-2336. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/hyp.6827/abstract

Hernes, P. J., Spencer, R. G. M., Dyda, R. Y., Pellerin, B. A., Bachand, P. A. M., & Bergamaschi, B. A. (2008). The role of hydrologic regimes on dissolved organic carbon composition in an agricultural watershed. Geochimica et Cosmochimica Acta, 72, 5266-5277. Retrieved from http://www.sciencedirect.com/science/article/pii/S0016703708004924

Spencer, R. G. M., Baker, A., Ahad, J. M. E., Cowie, G. L., Ganeshram, R., Upstill-Goddard, R. C., & Uher, G. (2007). Discriminatory classification of natural and anthropogenic waters in two U.K. estuaries. Science of the Total Environment, 373, 317-333. Retrieved from http://www.sciencedirect.com/science/article/pii/S0048969706008436

Spencer, R. G. M., Pellerin, B. A., Bergamaschi, B. A., Downing, B. D., Kraus, T. E. C., Dahlgren, R. A., Smart, D. R., & Hernes, P. J. (2007). Diurnal variability in riverine dissolved organic matter composition determined by in-situ optical measurements (San Joaquin, California, U.S.A.). Hydrological Processes, 21, 3181-3189. Retrieved from http://onlinelibrary.wiley.com/doi/10.1002/hyp.6887/abstract

Spencer, R. G. M., Bolton, L., & Baker, A. (2007). Freeze/thaw and pH effects on freshwater dissolved organic matter fluorescence and absorbance properties at a number of U.K. locations. Water Research, 41, 2941-2950. Retrieved from http://www.sciencedirect.com/science/article/pii/S0043135407002588

Spencer, R. G. M., Ahad, J. M. E., Baker, A., Cowie, G. L., Ganeshram, R., Upstill-Goddard, R. C., & Uher, G. (2007). The estuarine mixing behaviour of peatland derived dissolved organic carbon and its relationship to chromophoric dissolved organic matter in two North Sea estuaries. Estuarine, Coastal and Shelf Science, 74, 131-144. Retrieved from http://www.sciencedirect.com/science/article/pii/S0272771407001047

Ahad, J. M. E., Ganeshram, R., Spencer, R. G. M., Uher, G., Upstill-Goddard, R. C., & Cowie, G. L. (2006). Evaluating the sources and fate of anthropogenic dissolved inorganic nitrogen (DIN) in two contrasting North Sea estuaries. Science of the Total Environment, 372, 317-333. Retrieved from http://www.sciencedirect.com/science/article/pii/S0048969706007339

Ahad, J. M. E., Ganeshram, R., Spencer, R. G. M., Uher, G., Gulliver, P., & Bryant, P. L. (2006). Evidence for anthropogenic 14C-enrichment in estuarine waters adjacent to the North Sea. Geophysical Research Letters, 33, L08608. Retrieved from http://onlinelibrary.wiley.com/doi/10.1029/2006GL025991/full doi:10.1029/2006GL025991

Baker, A., & Spencer, R. G. M. (2004). Characterization of dissolved organic matter from source to sea using fluorescence and absorbance spectroscopy. Science of the Total Environment, 333, 217-232. Retrieved from http://www.sciencedirect.com/science/article/pii/S0048969704003237

Refereed Books

Coble, P. G., Baker, A., Lead, J. R., Reynolds, D., & Spencer, R. G. M. (2014). Aquatic Organic Matter Fluorescence. Environmental Chemistry Book Series, Cambridge University Press. 

Refereed Book Chapters

Spencer, R. G. M., & Raymond, P. A. (2024). Riverine DOM. In Hansell, D.A., & Carlson, S. (Eds.), Biogeochemistry of Marine Dissolved Organic Matter (pp. 870). Academic Press. 

Richey, J. E., Spencer, R. G. M., Drake, T., & Ward, N. W. (2021). Fluvial Carbon Dynamics across the Land to Ocean Continuum of Great Tropical Rivers: the Amazon and Congo. In Congo Basin Hydrology, Climate, and Biogeochemistry: A Foundation for the Future. Wiley AGU. Retrieved from DOI: 10.1002/essoar.10505912.1

Raymond, P. A., & Spencer, R. G. M. (2015). Riverine dissolved organic matter. In Dennis A. Hansell, & Craig A. Carlson (Eds.), Biogeochemistry of Marine Dissolved Organic Matter, 2nd Edition (pp. 509-535). Elsevier. 

Coble, P. G., Baker, A., Reynolds, D., & Spencer, R. G. M. (2014). An overview of organic matter fluorescence. In Paula G. Coble, Andy Baker, Jamie R. Lead, Darren Reynolds, & Robert G.M. Spencer (Eds.), Aquatic Organic Matter Fluorescence (pp. 75-124). Cambridge University Press. 

Hernes, P. J., Holmes, R. M., Raymond, P. A., Spencer, R. G. M., & Tank, S. E. (2014). Fluxes, processing and fate of riverine organic matter in the Arctic Ocean. In Thomas S. Bianchi, Mead A. Allison, & Wei-Jun Cai (Eds.), Biogeochemical Dynamics at Major River-Coastal Interfaces: Linkages with Global Climate Change (pp. 530-553). Cambridge University Press. 

Spencer, R. G. M., Stubbins, A., & Gaillardet, J. (2014). Geochemistry of the Congo River, estuary, and plume. In Thomas S. Bianchi, Mead A. Allison, & Wei-Jun Cai (Eds.), Biogeochemical Dynamics at Major River-Coastal Interfaces: Linkages with Global Climate Change (pp. 554-583). Cambridge University Press. 

Spencer, R. G. M., & Coble, P. G. (2014). Sample design for organic matter fluorescence analysis. In Paula G. Coble, Andy Baker, Jamie R. Lead, Darren Reynolds, & Robert G.M. Spencer (Eds.), Aquatic Organic Matter Fluorescence (pp. 125-146). Cambridge University Press. 

Holmes, R. M., Coe, M. T., Fiske, G. J., Gurtovaya, T., McClelland, J. W., Shiklomanov, A. I., Spencer, R. G. M., Tank, S. E., & Zhulidov, A. V. (2013). Climate change impacts on the hydrology and bigeochemistry of Arctic rivers. In Charles R. Goldman, Michio Kumagai, & Richard D. Robarts (Eds.), Climatic Change and Global Warming of Inland Waters: Impacts and Mitigation for Ecosystems and Societies (pp. 3-26). Wiley. 

Presentations

Invited Keynote and Plenary Presentations at Conferences

Spencer, R. G. M. (presented 2025, October). Unraveling the Anthropogenic Signature of Dissolved Organic Matter in Aquatic Systems with Ultrahigh Resolution Mass Spectrometry. Keynote presentation at Aquatic Biogeochemistry in Inland Waters, Chinese Academy of Sciences, Nanjing, China. (International)

Spencer, R. G. M. (presented 2025, May). Molecular Signatures of the Anthropocene. Keynote presentation at the meeting of Department of Environmental Sciences, Aarhus University. (National)

Spencer, R. G. M. (presented 2023, July). Anthropogenic Activity Impacts on Dissolved Organic Matter. Keynote presentation at Gordon Research Conference: Water Disinfection, Byproducts, and Health, Gordon Research Conference, Mount Holyoke College, MA, USA. (International)

Spencer, R. G. M. (presented 2022, November). FT-ICR MS derived insights into the Anthropocene. Keynote presentation at International Humic Substances Society Meeting, International Humic Substances Society, Moscow - Virtual. (International)

Invited Presentations at Conferences

Spencer, R. G. M., McKenna, A. M., Kellerman, A. M., Battin, T. I., Fellman, J. B., Hood, E., Peter, H., Schon, M., De Staercke, V., Styllas, M., Tolosano, M., & Holt, A. D. (presented 2025, December). Gradients of Deposition and In Situ Production Drive Global Glacier Organic Matter Composition. Presentation at American Geophysical Union Fall Meeting, Aavudai Anandhib. (International)

Spencer, R. G. M., Garcia-Tigeros, F., Druschel, G. K., Wickland, K. P., Striegl, R. G., McKenna, A. M., Niles, S., Wang, C., Smith, L. C., Schiff, S. L., Butman, D. E., & Kurek, M. R. (presented 2023, December). High Voltage: The Molecular Properties of Redox-Active Dissolved Organic Matter in Northern High-Latitude Lakes. Presentation at American Geophysical Union Fall Meeting, American Geophysical Union. (International)

Spencer, R. G. M., Tank, S., McClelland, J. W., Holmes, R. M., & Behnkre, M. I. (presented 2022, December). Aquatic Biomass is a Major Overlooked Source to Particulate Organic Matter Export in Large Arctic Rivers. Presentation at American Geophysical Union Fall Meeting, American Geophysical Union. (International)

Spencer, R. G. M. (presented 2021, October). Arctic Great Rivers Observatory. Presentation at Arctic COLORS: Coastal Arctic Biogeochemical Data Synthesis, NASA, Virtual. (International)

Spencer, R. G. M. (presented 2021, September). Dissolved organic matter molecular insights into a changing planet. Presentation at International Humic Substances Society Meeting, International Humic Substances Society, Moscow - Virtual. (International)

Spencer, R. G. M. (presented 2020, January). Molecular Signatures of the Anthropocene. Presentation at Dissolved organic matter in freshwaters: nature, origins and ecological significance, Royal Society, United Kingdom. (International)

Spencer, R. G. M. (presented 2019, October). Molecular Signatures of the Anthropocene. Presentation at Schweppe Speaker Series, University of Texas, University of Texas. (National)

Spencer, R. G. M. (presented 2019, February). Taking the Pulse of a Changing Planet - Award Presentation. Presentation at ASLO, ASLO, Puerto Rico. (International)

Spencer, R. G. M., Drake, T. W., Hernes, P. J., Dinga, B., Wabakanghanzi, J. N., & Six, J. (presented 2018, September). The changing carbon cycle in the Congo Basin. Presentation at Hydrologic Research in the Congo Basin, AGU Chapman Conference, Washington D.C. (International)

Spencer, R. G. M. (presented 2018, June). Dissolved organic matter source and export from Himalayan and Tibetan Plateau Glaciers. Presentation at Greening of the Himalaya: Impact of melting ice, University of Bristol, U.K, Bristol, U.K. (International)

Spencer, R. G. M. (presented 2017, October). Molecular-level insights into the reactivity and optical properties of dissolved organic matter in aquatic ecosystems. Presentation at the meeting of International Humic Substances Society Meeting, Moscow, Russia. (International)

Spencer, R. G. M., Mann, P. J., Eglinton, T. I., Dittmar, T., & Stubbins, A. (presented 2017, February). Low photochemical reactivity of permafrost derived dissolved organic matter. Presentation at Aquatic Sciences, ASLO, Honolulu, Hawaii. (International)

Spencer, R. G. M. (presented 2016, July). Toward a holistic biogeochemical understanding at the land-ocean interface in the Arctic. Presentation at Arctic COLORS, Woods Hole Oceanographic Institution / NASA, Woods Hole, MA. (National)

Spencer, R. G. M. (presented 2016, February). From the Arctic to the Equator – Reexamining organic carbon at the land-ocean interface. Presentation at Departmental Seminar, Florida International University, Miami, U.S.A. (Regional)

Spencer, R. G. M. (presented 2016, February). From the Arctic to the Equator: organic matter dynamics at the land-ocean interface. Presentation at Departmental Seminar, University of Bristol, Bristol, U.K. (Regional)

Spencer, R. G. M. (presented 2016, January). The Arctic Great Rivers Observatory. Presentation at Biogeochemical studies in the Siberian Shelf Seas, GEOMAR, Kiel, Germany. (International)

Spencer, R. G. M., Hernes, P. J., Dinga, B., Wabakanghanzi, J. N., & Six, J. (presented 2015, December). The organic matter biogeochemistry of the Congo River. Presentation at AGU Fall Meeting, AGU, San Francisco, U.S.A. (International)

Spencer, R. G. M. (presented 2015, October). From the Arctic to the Equator – Reexamining organic carbon at the land-ocean interface. Presentation at Distinguished seminar series on: Ecosystem ecology in a changing world: Innovative approaches and big questions, University of New Hampshire, Durham, U.S.A. (Regional)

Spencer, R. G. M. (presented 2015, June). From the Arctic to the Equator – Reexamining organic carbon at the land-ocean interface. Presentation at Departmental Seminar, Uppsala University, Uppsala, Sweden. (Regional)

Spencer, R. G. M. (presented 2015, March). The Arctic Great Rivers Observatory. Presentation at Departmental Seminar, Ural Branch of the Russian Academy of Sciences – Arkhangelsk Scientific Center, Arkhangelsk, Russia. (Regional)

Spencer, R. G. M., Stubbins, A., Fellman, J., Dittmar, T., Raymond, P. A., & Hood, E. (presented 2015, February). Storage, release and source of organic carbon in glacier environments. Presentation at ASLO Spring Meeting, ASLO, Granada, Spain. (International)

Spencer, R. G. M., Mann, P. J., Dittmar, T., Eglinton, T. I., & Stubbins, A. (presented 2014, December). Detecting the signature of permafrost thaw in Arctic rivers. Presentation at AGU Fall Meeting, AGU, San Francisco, U.S.A. (International)

Spencer, R. G. M., Aiken, G. R., Mann, P. J., Holmes, R. M., Niggemann, J., Hernes, P. J., & Stubbins, A. (presented 2014, December). The utility of CDOM for improving the resolution of riverine DOM fluxes and biogeochemical function. Presentation at AGU Fall Meeting, AGU, San Francisco, U.S.A. (International)

Spencer, R. G. M. (presented 2014, April). From the Arctic to the Equator - reexamining organic carbon at the land-ocean interface. Presentation at Departmental Seminar, University of Florida, Gainesville, U.S.A. (Regional)

Spencer, R. G. M. (presented 2014, January). Glaciers: A window into human perturbation of the carbon cycle. Presentation at Departmental Seminar, University of Newcastle, U.K, Newcastle, U.K. (Regional)

Spencer, R. G. M. (presented 2013, May). From the Arctic to the Equator: The role of rivers in the carbon cycle. Presentation at Seminar series, MBL Ecosystems Center, Woods Hole, U.S.A. (International)

Spencer, R. G. M. (presented 2013, April). Geochemistry and reactivity of riverine dissolved organic matter. Presentation at Climate people and environment program seminar series, University of Wisconsin-Madison, Madison, USA. (Regional)

Spencer, R. G. M. (presented 2013, April). Glaciers: A window into the anthropogenic perturbation of the global carbon cycle. Presentation at Yi-Fu lecture series, University of Wisconsin-Madison Geography Sciences, Madison, U.S.A. (Regional)

Spencer, R. G. M. (presented 2013, April). New Insights into the global carbon cycle from Arctic Rivers and glaciers. Presentation at Departmental Seminar, Clark University, Worcester, USA. (International)

Spencer, R. G. M. (presented 2013, February). From the Arctic to the Equator: The role of rivers in the carbon cycle. Presentation at Departmental Seminar, University of South Carolina Geosciences, University of South Carolina. (Regional)

Spencer, R. G. M., Aiken, G. R., Mann, P. J., Holmes, R. M., Niggemann, J., Dittmar, T., Hernes, P. J., & Stubbins, A. (presented 2013, February). The utility of CDOM for improving land to ocean terrigenous dissolved organic carbon fluxes. Presentation at ASLO Aquatic Sciences, ASLO, New Orleans, USA. (International)

Spencer, R. G. M. (presented 2012, November). The Arctic Great Rivers Observatory – new insights into carbon cycling at the land-ocean interface. Presentation at GEOTRACES Russian Workshop, NSF, Moscow, Russia. (International)

Spencer, R. G. M. (presented 2012, October). The geochemistry and reactivity of riverine dissolved organic matter. Presentation at 5th International Workshop on Soil and Sedimentary Organic Matter Stabilization and Destabilization, ETH-Zurich, Ascona, Switzerland. (International)

Spencer, R. G. M. (presented 2012, February). The role of inland waters in the global carbon cycle. Presentation at Departmental Seminar, University of Massachusetts, U.S.A. (Regional)

Spencer, R. G. M. (presented 2011, November). A new assessment of dissolved organic matter at the land-ocean interface. Presentation at Departmental Seminar, Boston University, Boston, U.S.A. (Regional)

Spencer, R. G. M. (presented 2011, July). From the Arctic to the Equator – Reexamining organic carbon at the land-ocean interface. Presentation at the meeting of ETH-Zurich, ETH-Zurich, Switzerland. (International)

Spencer, R. G. M., Hernes, P. J., Aufdenkampe, A. K., Stubbins, A., Gulliver, P., Baker, A., & Six, J. (presented 2011, July). Geochemistry and reactivity of exported Congo Riverine organic matter. Presentation at International Symposium on Soil Organic Matter, SOM, Leuven, Belgium. (International)

Spencer, R. G. M. (presented 2011, June). Optical properties as indicators of organic matter quality. Presentation at SEA-FOTO workshop, Skidaway Institute of Oceanography, U.S.A. (International)

Spencer, R. G. M. (presented 2011, April). Floodplains as biogeochemical reactors. Presentation at Geodynamics seminar series, Woods Hole Oceanographic Institution, USA. (National)

Spencer, R. G. M. (presented 2010, October). Carbon dynamics in the aquatic pathway. Presentation at Departmental Seminar, Xiamen University, Xiamen, China. (Regional)

Spencer, R. G. M., Wabakanghanzi, J., Holmes, R. M., Dinga, B., Hernes, P. J., Stubbins, A., & Six, J. (presented 2010, October). The Congo River. Presentation at World River Workshop, Woods Hole Oceanographic Institution, Woods Hole, U.S.A. (International)

Spencer, R. G. M., Hernes, P. J., Aufdenkampe, A. K., Holmes, R. M., Stubbins, A., & Six, J. (presented 2010, April). Controls on carbon cycling within the Congo River watershed. Presentation at NSF Tropical stream carbon workshop, Organization for Tropical Studies, La Selva, Costa Rica. (International)

Spencer, R. G. M., Hernes, P. J., Aiken, G. R., Striegl, R. G., Wickland, K. P., Stubbins, A., & Six, J. (presented 2010, April). The geochemistry and reactivity of riverine dissolved organic matter. Presentation at American Chemical Society Spring Meeting, American Chemical Society, San Francisco, U.S.A. (International)

Spencer, R. G. M. (presented 2009, May). Chromophoric dissolved organic matter – the future for examining reactivity and export of dissolved organic carbon in high-latitude northern rivers? Presentation at Water Sciences Network, NERC, Glasgow, U.K. (International)

Spencer, R. G. M., Baker, A., & Coble, P. G. (presented 2008, October). Environmental effects on organic matter fluorescence. Presentation at Organic Matter Fluorescence Chapman Conference, AGU, Birmingham, U.K. (International)

Spencer, R. G. M. (presented 2008, February). The future of aquatic dissolved organic matter monitoring: high resolution spatial and temporal measurements by in-situ instrumentation. Collaborative Research Network in Imaging and Visualisation. Presentation at Collaborative Research Network in Imaging and Visualisation, University of Birmingham, Birmingham, U.K. (International)

Refereed Presentations at Conferences

Spencer, R. G. M., Moura, J. M. S., Mitsuya, M., & Galy, V. V. (presented 2017, December). The pulse of the Amazon. Presentation at AGU Fall Meeting, AGU. (International)

Spencer, R. G. M., Hernes, P. J., Stubbins, A., Wabakanghanzi, J. N., & Six, J. (presented 2014, July). The organic matter biogeochemistry of the Congo River. Presentation at International Conference on the Status and Future of the World's Large Rivers, UNESCO, Manaus, Brazil. (International)

Spencer, R. G. M., Mann, P. J., Ditmar, T., Eglinton, T. I., & Stubbins, A. (presented 2014, May). Detecting the signature of permafrost thaw in arctic rivers. Presentation at ASLO-JNABS meeting, ASLO, Portland, U.S.A. (International)

Spencer, R. G. M., Stubbins, A., Hernes, P. J., Mann, P. J., Dyda, R. Y., Aiken, G. R., Striegl, R. G., Wickland, K. P., Six, J., & Holmes, R. M. (presented 2012, February). Linking chromophoric dissolved organic matter characteristics to ecosystem biogeochemistry. Presentation at ASLO Spring meeting, ASLO, Salt Lake City, U.S.A. (International)

Spencer, R. G. M., Mann, P. J., Hernes, P. J., Aiken, G. R., Tank, S., Butman, D., Raymond, P. A., Dyda, R. Y., Six, J., Bulygina, E., Zulidov, A. V., Gurtovaya, T. Y., Peterson, B., McClelland, J. W., & Holmes, R. M. (presented 2011, December). Geochemistry and flux of terrigenous dissolved organic matter to the Arctic Ocean. Presentation at AGU Fall meeting, AGU, San Francisco, U.S.A. (International)

Spencer, R. G. M., Hernes, P. J., Ruf, R., Baker, A., Dyda, R. Y., Stubbins, A., & Six, J. (presented 2009, December). Temporal controls on dissolved organic matter and lignin biogeochemistry in a pristine tropical river, Democratic Republic of Congo. Presentation at AGU Fall meeting, AGU, San Francisco, U.S.A. (International)

Spencer, R. G. M., Hood, E., Fellman, J., Hernes, P. J., Edwards, R., D'Amore, D., & Scott, D. (presented 2009, July). Glaciers as a source of ancient, labile organic matter to the marine environment. Presentation at Gordon Research Conference, GRC, Proctor Academy, New Hampshire, U.S.A. (International)

Spencer, R. G. M., Stubbins, A., Hernes, P. J., Baker, A., Mopper, K., Aufdenkampe, A. K., Dyda, R. Y., Mwamba, V. L., Mangangu, A. M., Wabakanghanzi, J. N., & Six, J. (presented 2008, December). Geochemistry and reactivity of exported Congo Riverine organic matter. Poster presentation at AGU Fall meeting, AGU, San Francisco, U.S.A. (International)

Spencer, R. G. M., Aiken, G. R., Wickland, K. P., Striegl, R., & Hernes, P. J. (presented 2007, December). Seasonal and spatial variability in dissolved organic matter quantity and composition from the Yukon River Basin, Alaska. Presentation at AGU Fall meeting, AGU, San Francisco, U.S.A. (International)

Spencer, R. G. M., Pellerin, B. A., Bergamachi, B. A., Downing, B. D., Kraus, T. E., Dahlgren, R. A., & Hernes, P. J. (presented 2007, July). Diurnal variability in riverine dissolved organic matter composition determined by in-situ optical measurements. Presentation at Gordon Research Conference, GRC, Colby-Sawyer College, New Hampshire, U.S.A. (International)

Spencer, R. G. M., Hernes, P. J., Pellerin, B. A., & Bergamaschi, B. A. (presented 2007, February). Photochemical and microbial degradation of terrigenous dissolved organic matter in the San Francisco Bay Estuary. Presentation at ASLO Aquatic Sciences Meeting, ASLO, Santa Fe, U.S.A. (International)

Invited Lectures and Readings of Original Work

Spencer, R. G. M. (2022, December). Global Changes in Dissolved Organic Matter Driven by Anthropogenic Activities. Delivered at Department of Environmental Systems Science, ETH-Zurich, ETH-Zurich. (International)

Spencer, R. G. M. (2022, December). Organic Matter Insights into the Changing Cryosphere. Delivered at ETH-Zurich AMS Facility, ETH-Zurich. (International)

Spencer, R. G. M. (2022, October). Molecular signatures of the Anthropocene. Delivered at University of St. Andrews, Scotland, U.K. (International)

Contracts and Grants

Contracts and Grants Funded

Spencer, R. G. M. (Apr 2026–Mar 2030). Assessing Carbon Fluxes and Biogeochemical Processing Across Arctic Frontlines of Rapidly Transforming Ecosystems (FORTE). Funded by NASA ROSES. Total award $362,579. 

Spencer, Robert George Martin (PI). (Sep 2025–Aug 2028). Collaborative Research: Advancing knowledge of Arctic land-ocean dynamics through the Arctic Great Rivers Observatory (ArcticGRO). Funded by National Science Foundation. (2419919). Total award $229,654. 

Spencer, Robert George Martin (PI). (Aug 2025–Jul 2028). Collaborative Research: What Underpins the High Bioavailability of Glacier Organic Matter? Funded by National Science Foundation. (2506415). Total award $572,154. 

Spencer, R. G. M. (Dec 2024–Dec 2028). What Drives the Composition and High Bioavailability of Greenland Glacier Organic Matter? Funded by Novo Nordisk Fonden. Total award $144,765. 

Spencer, R. G. M. (Sep 2024–Aug 2027). Do changing terrestrial-aquatic interfaces in Arctic-boreal landscapes control the form, processing, and fluxes of carbon? Funded by NASA. Total award $155,458. 

Spencer, R. G. M., & Kurek, M. R. (Aug 2023–Jul 2025). RAPID: El Niño Event Impacts on Organic Matter Export and Composition in the Amazon River. Funded by NSF. Total award $96,993. 

Spencer, R. G. M., & Kellerman, A. M. (Jan 2023–Dec 2024). Collaborative Research: RAPID: Do large recent wildfires in the Yukon River Delta alter the delivery of black carbon to the Arctic Ocean? Funded by NSF. Total award $22,323. 

Spencer, R. G. M. (Jan 2022–Jan 2026). Innovative geochemical methods for investigating permafrost and active layer processes in northern Canada. Funded by Geological Survey of Canada. Total award $40,000. 

Spencer, R. G. M. (Sep 2021–Aug 2024). Arctic deltas and coastal margins as buffers and transformers of carbon along a rapidly changing land-ocean continuum. Funded by NASA Carbon Cycle Science. Total award $230,295. 

Spencer, R. G. M. (Sep 2021–Aug 2024). Remote sensing of river carbon fluxes to the ocean. Funded by NASA Carbon Cycle Science. Total award $57,926. 

Spencer, R. G. M. (Sep 2021–Aug 2024). Chemical signatures of biosolid movement across a watershed. Funded by State of Florida. Total award $185,703. 

Spencer, R. G. M., Mackelprang, R., & Shade, A. (Aug 2021–Jul 2025). Collaborative Research: Microbial processes and carbon transformation in the thawing permafrost. Funded by NSF-DEB. Total award $1,499,648. 

Spencer, R. G. M. (Aug 2021–Jul 2024). Belmont Forum: Global change impact on vulnerable carbon reservoirs: Carbon sequestration and emissions in soils and water from the Arctic to the Equator. Funded by Belmont Forum NSF. Total award $199,806. 

Spencer, R. G. M. (Jan 2021–Jul 2021). Ancient Subsidies to Modern Food Webs. Funded by NSF-OPP INTERN. Total award $54,863. 

Spencer, R. G. M. (Nov 2020–Oct 2022). Lake Kivu's Carbon Time Bomb. Funded by National Geographic. Total award $370,509. 

Spencer, Robert George Martin (PI). (Jan 2020–Dec 2021). Characterizing Dissolved Organic Matter and Carbon Dynamics in Critical Coastal Salmon Habitat of British Columbia. Funded by Skeena Fisheries Commission. (NONE). Total award $12,000. 

Spencer, Robert George Martin (PI). (Sep 2019–Aug 2026). Collaborative Research: AON: The Arctic Great Rivers Observatory (ArcticGRO). Funded by National Science Foundation. (1914081). Total award $520,120. 

Spencer, R. G. M. (Jul 2019–Jun 2022). Crossing the divide: Inundation drives hotspots of carbon flux. Funded by NASA. Total award $160,750. 

Spencer, R. G. M. (Jan 2019–Dec 2021). Molecular insights into wetland carbon storage across the United States. Funded by Department of Interior. Total award $36,362. 

Spencer, R. G. M. (May 2018–Dec 2018). Developing Scholar Award. Funded by FSU. Total award $10,000. 

Spencer, R. G. M. (Jan 2018–Dec 2018). Building the Future Generation of Arctic Environmental Scientists – Amplifying the Impact. Funded by Trust for Mutual Understanding. Total award $15,000. 

Spencer, R. G. M. (Dec 2017–Dec 2020). Impacts of estuarine processes on delivery of Arctic riverine materials to the near coastal environment: Implications for water quality and biogeochemical cycling in preparation for Arctic-COLORS. Funded by NASA (Remote Sensing of Water Quality). Total award $248,980. 

Spencer, R. G. M., & Podgorski, D. P. (Jun 2017–May 2019). Monitoring the transport of water-soluble petroleum metabolites with FT-ICR MS and optical sensors. Funded by Minnesota Association of Resource Conservation and Development Councils. Total award $82,291. 

Spencer, R. G. M. (Sep 2016–Aug 2019). AON: The Arctic Great Rivers Observatory (Arctic-GRO). Funded by NSF-OPP. Total award $169,165. 

Spencer, R. G. M. (Aug 2016–May 2017). Wakulla Springs water quality restoration. Funded by Fish and Wildlife Foundation of Florida. Total award $15,000. 

Spencer, R. G. M. (May 2016–Aug 2016). Redefining land-ocean fluxes of carbon in a changing Arctic. Funded by FSU-COFRS. Total award $12,999. 

Spencer, R. G. M. (Jan 2016–Jul 2016). Developing the next generation of Arctic environmental scientists. Funded by Trust for Mutual Understanding. Total award $15,000. 

Spencer, R. G. M. (Nov 2015–Dec 2015). Travel Award - College of Arts and Sciences - 2015 AGU Fall meeting. Funded by Florida State University College of Arts and Sciences. Total award $1,000. 

Spencer, R. G. M. (Oct 2015–Sep 2018). Vulnerability of inland waters and the aquatic carbon cycle to changing permafrost and climate across boreal northwestern North America. Funded by NASA ABoVE. Total award $103,717. 

Spencer, R. G. M. (Nov 2014–Dec 2014). Travel Award - College of Arts and Sciences - 2014 AGU Fall meeting. Funded by College of Arts and Sciences. Total award $1,000. 

Spencer, R. G. M. (Oct 2013–Sep 2017). Calibration and application of vascular plant and aqueous microbial biomarkers to examine transformation of dissolved organic matter. Funded by NSF Chemical Oceanography. Total award $166,646. 

Spencer, R. G. M. (2013–2014). Developing new biomarkers for permafrost thaw organic matter - Visiting geosciences fellowship. Funded by University of Newcastle. Total award $10,000. 

Spencer, R. G. M., Zimov, S. A., Eglinton, T. I., & Holmes, R. M. (2012–2017). Detecting the signature of permafrost thaw in Arctic Rivers. Funded by NSF Office of Polar Programs. Total award $798,425. 

Stubbins, A., Spencer, R. G. M., Frischer, M., Raymond, P. A., & Hood, E. (2012–2015). Collaborative Research: Is the export of ancient, labile carbon from glacial ecosystems driven by the deposition of fossil fuel combustion byproducts. Funded by NSF DEB. Total award $512,400. 

Holmes, R. M., Spencer, R. G. M., McClelland, J. W., Peterson, B. J., & Raymond, P. A. (2012–2016). The Arctic Great Rivers Observatory (Arctic-GRO). Funded by NSF Office of Polar Programs. Total award $2,633,299. 

Osburn, C., Spencer, R. G. M., Stubbins, A., & Stedmon, C. A. (2012–2013). Emerging Issues Workshop: Linking optical and chemical properties of dissolved organic matter in natural waters. Funded by ASLO. Total award $10,000. 

Spencer, R. G. M. (2012–2014). Linking dissolved organic matter composition to ecosystem function. Funded by Hanse-Wissenshaftskolleg Marine and Climate Research Twin Fellow. Total award $6,000. 

Spencer, R. G. M., & Guo, W. D. (2011–2013). The source and ecosystem role of organic matter in Chinese mountain glaciers. Funded by MEL Young Scientist Visiting Fellowship. Total award $20,000. 

Spencer, R. G. M. (2010–2013). Yukon River Basin organic matter biolability and dynamics. Funded by U.S. Geological Survey. Total award $60,000. 

Peucker-Ehrenbrink, B., Holmes, R. M., Spencer, R. G. M., Galy, V., Goetz, S., & Eglinton, T. I. (2009–2013). Controls on the flux, age and composition of terrestrial organic carbon exported by rivers to the ocean. Funded by NSF ETBC. Total award $2,299,872. 

Contracts and Grants Pending

Rodgers, Ryan P (Co-PI), Spencer, Robert George Martin (Co-PI), Kalkreuter, Robert Edward (Co-PI), Li, Xiangpeng (PI), & Hakansson, Kristina Ingrid (Co-PI). (Aug 2025). Revolutionizing Antibiotic Discovery: An Ultra-High-Throughput Droplet Microfluidics and Multi-Omics Pipeline. Submitted to Bill and Melinda Gates Foundation. Total award $283,554. 

Spencer, Robert George Martin (PI). (Apr 2025). NASA Frontlines of Rapidly Transforming Ecosystems (FORTE). Submitted to National Aeronautics & Space Administration. Total award $362,577. 

Postdoctoral Supervision

Holt, A. D. (May 2024–present). 

Kurek, M. (Aug 2023–Sep 2025). 

Kellerman, A. M. (Aug 2015–Sep 2025). 

Vaughn, D. (Aug 2019–Feb 2023). 

Hawkings, J. (Aug 2018–Dec 2021). 

Zito, P. (Sep 2017–Sep 2018). 

Adam Amir (Jan 2017–May 2018). 

Guillemette, F. (Jan 2015–Jan 2017). 

Carey, J. C. (Jan–Aug 2016). 

Mann, P. J. (Aug 2012–Aug 2014). 

Service

Florida State University

FSU University Service

Committee Member, Early STEM Extraordinary Accomplishments Program (2021–present).

Committee Member, Vice President for Research Search Information & Committee (2021–present).

Member, NHMFL Red Team (2021–present).

FSU Department Service

Chair, OCE Group (2023–present).

Committee Member, Departmental Chair Search (2021–present).

Chair, Environmental Science Graduate Committee (2021–present).

Chair, Environmental Science Undergraduate Committee (2021–present).

Member, TA Committee (2020–present).

Member, Environmental Science Curricular Committee (2014–present).

Member, Faculty Evaluation Committee (2020–2021).

The Profession

Editor for Refereed Journals

Associate Editor, Journal of Geophysical Research Biogeosciences (2020–present).

Associate Editor, Frontiers in Earth Science - Biogeoscience (2014–present).

Guest Editing for Refereed Journals

Spencer, R. G. M. (Ed.). (2018). Biogeochemistry of Natural Organic Matter [Special Issue]. Journal of Geophysical Research: Biogeosciences.

Guest Reviewer for Refereed Journals

Nature Communications (2014–present).

Nature Climate Change (2013–present).

Environmental Research Letters (2012–present).

Biogeosciences (2011–present).

Continental Shelf Research (2011–present).

Ecological Applications (2011–present).

Applied Geochemistry (2010–present).

Estuarine and Coastal Shelf Research (2010–present).

Journal of Sea Research (2010–present).

Nature (2010–present).

Nature Geoscience (2010–present).

Chemical Geology (2009–present).

Ecosystems (2009–present).

Geochimica et Cosmochimica Acta (2009–present).

Geophysical Research Letters (2009–present).

Hydrological Processes (2009–present).

Journal of Geophysical Research-Biogeosciences (2009–present).

Marine Pollution Bulletin (2009–present).

Water Resources Research (2009–present).

Biogeochemistry (2008–present).

Global Biogeochemical Cycles (2008–present).

Hydrobiologia (2008–present).

Limnology and Oceanography (2008–present).

Marine Chemistry (2008–present).

Environmental Science and Technology (2007–present).

Science of the Total Environment (2007–present).

Chair of a Symposium

Spencer, R. G. M. (Chair). (2022, December). The Changing Cryosphere. Symposium conducted at the meeting of AGU, AGU Fall Meeting. 

Spencer, R. G. M. (Chair). (2021, October). Arctic COLORS: Coastal Arctic Biogeochemical Data Synthesis. Symposium conducted at the meeting of NASA OBB, Virtual. 

Osburn, C., Spencer, R. G. M., Bianchi, T., & Stedmon, C. (Chair). (2016, February). Linking Optical and Chemical Properties of Organic Matter. Symposium conducted at the meeting of ASLO, New Orleans, U.S.A. 

Spencer, R. G. M., & Wickland, K. P. (Chair). (2015, December). Organic Matter as an Integrated Signal of Climate and Land-Use Change from Source to Sea. Symposium conducted at the meeting of AGU, AGU Fall Meeting. 

Spencer, R. G. M. (Chair). (2015, September). International Workshop on Organic Matter Spectroscopy: Dissolved organic matter characterization in polar regions using spectroscopic techniques. Symposium conducted at the meeting of WOMS, Sopot, Poland. 

Osburn, C., Spencer, R. G. M., Stubbins, A., & Stedmon, C. A. (Chair). (2013, February). Emerging Issues Workshop: Linking optical and chemical properties of dissolved organic matter in natural waters. Symposium conducted at the meeting of ASLO, New Orleans, U.S.A. 

Spencer, R. G. M., & Hernes, P. J. (Chair). (2013, February). Employing Riverine Organic Matter as an Integrated Signal of Catchment Processes, Climate and Land-Use Change. Symposium conducted at the meeting of ASLO Meeting, New Orleans, U.S.A. 

Spencer, R. G. M., & Stubbins, A. (Chair). (2012, February). Linking the Optical and Chemical Properties of Dissolved Organic Matter in Natural Waters. ASLO Ocean Sciences Meeting. Symposium conducted at the meeting of ASLO, Salt Lake City, U.S.A. 

Spencer, R. G. M., & Hernes, P. J. (Chair). (2011, December). From Land to Sea: Using Riverine Organic Matter as an Integrated Signal of Basin-Scale Processes, Climate and Land-Use Change. Symposium conducted at the meeting of AGU, San Francisco, U.S.A. 

Spencer, R. G. M. (Chair). (2011, June). Organic matter dynamics – from soils to oceans. Symposium conducted at the meeting of Scientific Committee of the International Symposium on Soil Organic Matter, Leuven, Belgium. 

Spencer, R. G. M., & Baker, A. (Chair). (2008, October). Environmental Influences on Organic Matter Fluorescence. AGU Chapman Conference. Symposium conducted at the meeting of AGU, Birmingham, U.K. 

Spencer, R. G. M., Hernes, P. J., & Baker, A. (Chair). (2007, December). The Age and Biochemical Composition of Organic Carbon and Age of Inorganic Carbon from Source to Sea. Symposium conducted at the meeting of AGU, San Francisco, U.S.A. 

Spencer, R. G. M., & Baker, A. (Chair). (2006, December). Novel Applications of Optical Technology in Terrestrial and Aquatic Ecosystems. Symposium conducted at the meeting of AGU, San Francisco, U.S.A. 

Reviewer or Panelist for Grant Applications

NSF Navigating the New Arctic (2020–present).

DOE Office of Biological & Environmental Research (2018–present).

NASA Terrestrial Ecology (2016–present).

Natural Environment Research Council (U.K.) (2011–present).

NSF Chemical Oceanography (2010–present).

NSF Division of Environmental Biology (2010–present).

NSF Geobiology and Low-Temperature Geochemistry (2010–present).

NSF Hydrology (2010–present).

NSF Office of Polar Programs (2010–present).

Service to Professional Associations

Chair of Lindeman Awards Committee, ASLO (2019–present).

External Expert, Improving Groundwater Security in the United States, President's Council of Advisors on Science and Technology (2024).