Sasha Wagner


Our research focuses on the biogeochemistry of dissolved organic matter – a complex mixture of organic molecules deriving from fresh biomass, detritus, charred residues, and anthropogenic sources. Since dissolved organic matter is mobilized by water and is comprised of 50% carbon by mass, it plays an integral role in connecting terrestrial and oceanic carbon reservoirs and in regulating ecosystem structure and function. We specialize in the study of black carbon, the thermogenic fraction of organic matter that has a condensed aromatic molecular structure, is biologically inert, and persists in the environment for millennia. Our research program combines different geochemical techniques to constrain the role of dissolved organic matter and black carbon in a modern Earth system that is altered by anthropogenic activity and continued climate change.

If you are interested in joining our lab or learning more about the research we do, please visit our lab website or contact me at the email listed below.

Education & Training

PhD in Environmental Chemistry, Florida International University, 2015

BS in Biochemistry, University of Delaware, 2009

Other affililations: Chemistry and Chemical Biology


Other Focus Areas
  • organic geochemistry
  • biogeochemistry
  • aquatic carbon cycling
  • dissolved organic matter
  • black carbon


The following is a selection of recent publications in Scopus. Sasha Wagner has 31 indexed publications in the subjects of Environmental Science, Earth and Planetary Sciences, Agricultural and Biological Sciences.

Riley Barton, Christina M. Richardson, Evelyn Pae, Maya S. Montalvo, Michael Redmond, Margaret A. Zimmer, Sasha Wagner
Limnology And Oceanography Letters
, 9
, 2024
, pp.70-80
C. Richardson, M. Montalvo, S. Wagner, R. Barton, A. Paytan, M. Redmond, M. Zimmer
Water Resources Research
, 60
, 2024
K. M. Bisson, S. Gassó, N. Mahowald, S. Wagner, B. Koffman, S. A. Carn, S. Deutsch, E. Gazel, S. Kramer, N. Krotkov, C. Mitchell, M. E. Pritchard, K. Stamieszkin, C. Wilson
Remote Sensing of Environment
, 296
, 2023
Alysha I. Coppola, Sasha Wagner, Sinikka T. Lennartz, Michael Seidel, Nicholas D. Ward, Thorsten Dittmar, Cristina Santín, Matthew W. Jones
Nature Reviews Earth and Environment
, 3
, 2022
, pp.516-532
Amy D. Holt, Anne M. Kellerman, Wenbo Li, Aron Stubbins, Sasha Wagner, Amy McKenna, Jason Fellman, Eran Hood, Robert G.M. Spencer
Journal of Geophysical Research: Biogeosciences
, 126
, 2021
Marijn Bauters, Travis W. Drake, Sasha Wagner, Simon Baumgartner, Isaac A. Makelele, Samuel Bodé, Kris Verheyen, Hans Verbeeck, Corneille Ewango, Landry Cizungu, Kristof Van Oost, Pascal Boeckx
Nature Communications
, 12
, 2021
Sasha Wagner, Alysha I. Coppola, Aron Stubbins, Thorsten Dittmar, Jutta Niggemann, Travis W. Drake, Michael Seidel, Robert G.M. Spencer, Hongyan Bao
Nature Communications
, 12
, 2021
Aleksandar I. Goranov, Morgan F. Schaller, Jonathan A. Long, David C. Podgorski, Sasha Wagner
Energy and Fuels
, 35
, 2021
, pp.18135-18145

View All Scopus Publications

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