Faculty

John Kessler

Associate Professor
PhD, University of California Irvine, 2005

Department of Earth & Environmental Sciences
210 Hutchison Hall
(585) 273-4572
john.kessler@rochester.edu

Office Hours: By appointment

Website
Curriculum Vitae

Research Overview

www.johnkesslerlab.com

Dr. Kessler and his lab investigate chemical oceanography with an emphasis on isotope biogeochemistry to elucidate methane and carbon dioxide dynamics within the oceanic system as well as across other Earth systems. He is driven to conduct this research by a desire to quantify feedbacks associated with global climate change. The oceanic methane and carbon dioxide systems are not only the largest global reservoirs of these greenhouse gases in active exchange with the atmosphere, but some of the largest global carbon reservoirs. In addition, the oceanic methane system is a dynamic, metastable, and relatively unexplored reservoir that has the potential for large and explosive feedbacks with climate due to the potency of methane as a greenhouse gas.  The research in this lab quantifies the dynamics at the junction of these two greenhouse gas systems.  Analytical chemistry and isotope (radio and stable) biogeochemistry measurements are conducted and used in regional geochemical models to quantify methane and carbon dioxide biogeochemical dynamics. Past projects investigated methane and carbon dioxide biogeochemistry in the Gulf of Mexico, Alaskan Arctic and Subarctic, Cariaco Basin, Black Sea, and Southern California Bight focusing on such natural features as methane clathrate hydrates, subsea permafrost, and hydrocarbon seeps as well as the biochemical processes in the water column that may enhance or limit its atmospheric release. Overall, the long term goal of this laboratory is to study the dynamics at the junction of the oceanic methane and carbon dioxide systems especially with respect to climate change.

Courses Offered (subject to change)

  • EES 212 / 412  A Climate Change Perspective to Chemical Oceanography, Syllabus
  • EES 261 / 461  Stable Isotope Geochemistry: Fractionation Equations and Models, Syllabus
  • EES 307 / 407  Advanced Seminar in Climate and Environmental Change, Syllabus
  • EES 312W  Research in Ocean Biogeochemistry, Syllabus

Selected Publications

Bold indicates graduate student authors; bold and asterisk indicates undergraduate authors.

  • Weinstein, A.*, L. Navarrete*, C. Ruppel, T. C. Weber, M. Leonte, M. Y. Kellermann, E. C. Arrington, D. L. Valentine, M. I. Scranton, and J. D. Kessler. (2016) “Determining the flux of methane into Hudson Canyon at the edge of methane clathrate hydrate stability.” Geochem. Geophys. Geosyst., 17, doi:10.1002/2016GC006421.
  • Garcia-Tigreros Kodovska, F., K.J. Sparrow, S.A. Yvon-Lewis, A. Paytan, N.T. Dimova, A. Lecher, J.D. Kessler. (2016) “Dissolved methane and carbon dioxide fluxes in Subarctic and Arctic regions: Assessing measurement techniques and spatial gradients.” Earth and Planetary Science Letters, doi: 10.1016/j.epsl.2015.12.002.
  • Chan, E., J. D. Kessler, A. Shiller, D.J. Joung, F. Colombo. (2016) “Aqueous mesocosm techniques enabling the real-time measurement of the chemical and isotopic kinetics of dissolved methane and carbon dioxide.” Environmental Science & Technology, doi: 10.1021/acs.est.5b04304.
  • Lecher, A.L., J.D. Kessler, K. Sparrow, F. Garcia-Tigreros Kodovska, N. Dimova, J. Murray, S. Tulaczyk, A. Paytan. (2015) “Methane transport through submarine groundwater discharge to the North Pacific and Arctic Ocean at two Alaskan sites.” Limnology and Oceanography, doi: 10.1002/lno.10118.
  • Paytan, A., A. Lecher, N. Dimova, K. Sparrow, F. Garcia-Tigreros Kodovska, J.D. Kessler. (2015) “Methane transport from the active layer to lakes in the Arctic using Toolik Lake, Alaska, as a case study.” Proceedings of the National Academy of Sciences, doi:10.1073/pnas.1417392112.
  • Kessler, J.D. (2014) “Atlantic Bubble Bath.” Nature: Geoscience, doi: 10.1038/ngeo2238.
  • Du, M., S. Yvon-Lewis, F. Garcia-Tigreros, D.L. Valentine, S. Mendes, J.D. Kessler. (2014) “High resolution measurements of methane and carbon dioxide concentrations and air-sea fluxes reveal the influence of methane seepage on greenhouse gas dynamics in a massive natural seep field near Coal Oil Point, California.” Environmental Science & Technology. doi: 10.1021/es5017813.
  • Du, M., and J.D. Kessler (2012). “An Assessment of the Spatial and Temporal Variability of Bulk Hydrocarbon Respiration Following the Deepwater Horizon Oil Spill.”  Environmental Science & Technology, doi: 10.1021/es301363k.
  • Ryerson, T.B., R. Camilli, J.D. Kessler, E.B. Kujawinski, C.M. Reddy, D.L. Valentine, E. Atlas, D.R. Blake, J. de Gouw, S. Meinardi, D.D. Parrish, J. Peischl, J.S. Seewald, and C. Warneke (2012). “Chemical data quantify Deepwater Horizon hydrocarbon flow rate and environmental distribution.” Proceedings of the National Academy of Sciences, doi: 10.1073/pnas.1110564109.
  • Hu, L., S.A. Yvon-Lewis, J.D. Kessler, and I.R. MacDonald. (2012) “Methane fluxes to the atmosphere from deepwater hydrocarbon seeps in the northern Gulf of Mexico.” J Geophys Res-Oceans. 117 (C1), C01009
    doi:10.1029/2011JC007208.
  • Kessler, J.D., D.L. Valentine, M.C. Redmond, M. Du, E.W. Chan, S.D. Mendes, E.W. Quiroz, C.J. Villanueva, S.S. Shusta, L.M. Werra, S.A. Yvon-Lewis, T.C. Weber (2011). "A Persistent Oxygen Anomaly Reveals the Fate of Spilled Methane in the Deep Gulf of Mexico."  Science, 331, 312-315, doi:10.1126/science.1199697.
  • Valentine, D.L., J.D. Kessler, M.C. Redmond, S.D. MendesM.B. Heintz, C. Farwell, L. Hu, F.S. Kinnaman, S.A. Yvon-Lewis, M. Du, E.W. Chan, F. Garcia-Tigreros, C.J. Villanueva (2010). "Propane respiration jump-starts microbial response to a deep oil spill."  Science, 330, 208-211, doi:10.1126/science.1196830.

 

Research & Student Opportunities

Research in my laboratory focuses on oceanic methane isotope biogeochemistry investigations. Our projects are heavily rooted in analytical chemistry, while also being very multidisciplinary drawing from the fields of chemistry, geology, biology, physics, mathematics, and engineering. I am always interesting in talking with intelligent, enthusiastic, and hardworking students about the possibility of joining our team. I encourage prospective Master’s of Science and Ph.D. students to contact me directly before submitting an application to our graduate program.  I also strongly encourage interested undergraduates to contact me about conducting independent research in my laboratory.