Sasha Wagner

Assistant Professor, Earth and Environmental Sciences

My research interests broadly focus on the geochemistry of organic matter, a fundamental component of carbon and biogeochemical cycles. As part of this research, I specialize in the study of black carbon, the fire-derived portion of organic matter. In my lab, we use a variety of analytical and chemical techniques to decipher the molecular information contained within organic matter and to advance our understanding of aquatic biogeochemistry in the face of environmental 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

PhD in Environmental Chemistry, Florida International University, 2015

BS in Biochemistry, University of Delaware, 2009

Research Focus
  • organic geochemistry
  • biogeochemistry
  • environmental chemistry
  • dissolved organic matter
  • black carbon
Select Works
  • 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, e2021JG006516. doi.org/10.1029/2021JG006516
  • Goranov, A.I., Schaller, M. F., Long, J.A., Podgorski, D.C., Wagner, S. (2021) Characterization of asphaltenes and petroleum using benzenepolycarboxylic acids and compound-specific stable carbon isotopes. Energy and Fuels doi.org/10.1021/acs.energyfuels.1c02374
  • Bauters, M., Drake, T., Wagner, S., Baumgartner, S., Makelele, I., Bode, S., Verheyen, K., Verbeeck, H., Ewango, C., Ntaboba, L.C., Van Oost, K., Boeckx, P. (2021) Fire-derived phosphorus fertilization of African tropical forests. Nature Communications 12, 5129. doi.org/10.1038/s41467-021-25428-3
  • Wagner, S., Harvey, E., Baetge, N., McNair, H., Arrington, E., Stubbins, A. (2021) Investigating atmospheric inputs of dissolved back carbon to the Santa Barbara Channel during the Thomas Fire (California, USA). Journal of Geophysical Research: Biogeosciences 126, e2021JG006442. doi.org/10.1029/2021JG006442
  • 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, 4281. doi.org/10.1038/s41467-021-24477-y
  • 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 402, 123998. doi.org/10.1016/j.jhazmat.2020.123998
  • 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 34, e2020GB006560. doi.org/10.1029/2020GB006560
  • Wagner, S., Schubotz, F., Kaiser, K., Hallmann, C., Waska, H., Rossel, P.E., Hansman, R., Elvert, M., Middelburg, J.J., Engel, A., Blattmann, T.M., Catalá, T.S., Lennartz, S.T., Gomez-Saez, G.V., Pantoja-Gutiérrez, S., Bao, R., Galy, V. (2020) Soothsaying DOM: A current perspective on the future of oceanic dissolved organic carbon. Frontiers in Marine Science 7:341. doi.org/10.3389/fmars.2020.00341