USF Geology

Jonathan G. Wynn


Research Interests

Stable isotope geochemistry

Global carbon cycle; soil carbon

Paleoenvironments and paleoclimate

Paleoclimate and human evolution

Ocean Acidification; Arctic Ocean


1995 B.S., with Honors, Geology, Geological Engineering, University of Utah
1998 M.S., Geology, University of Utah, Graduate Advisor: Thure E. Cerling
2001 Ph.D., Geology, University of Oregon, Graduate Advisor: Gregory J. Retallack
2001-03 Visiting Research Fellow, and NSF International Research Fellow, Research School of Earth Sciences, the Australian National University, Australia
2003-04 Research Fellow and Courtesy Research Associate, Department of Geological Sciences, University of Oregon
2004 Postdoctoral Researcher, Carbon Cycle Research Group, US Geological Survey
2004-05 Research Fellow, School of Geography and Geosciences, University of St. Andrews
2006 Assistant Professor, Department of Earth and Environmental Sciences, Lehigh University
2006-pres. Assistant then Associate Professor, Department of Geology, University of South Florida
2013-2015 Rotating Program Officer, Earth Sciences Instrumentation and Facilities Program, National Science Foundation

Funded Research Grants

Australian Research Council, Discovery Projects 2016, Carbon, water and land use change in Australian tropical savannas: up in smoke and out to sea?, AUD$397,900, co-PI (Discovery International Award) with Lindsay Hutley, Samantha Setterfield, Michael Bird.

National Science Foundation, Sedimentary Geology and Paleobiology Program, Integrating multidisciplinary tools to study Plio-Pleistocene paleoecology of early hominins from the Omo Valley, Ethiopia, $180,000 co-PI with Zeresenay Alemseged, Matt Sponheimer, Rene Bobe.

National Science Foundation, Physical Anthropology Program, A biogeochemical study of the diet of Australopithecus afarensis, lead PI with Matt Sponheimer, Bill Kimbel, Zeresenay Alemseged.

National Science Foundation, Biological Anthropology Program, IPG: Collaborative Research: A high-resolution Analysis of unique paleoenvironmental data from key hominin sites in East Africa, $117, 251, co-PI with Christopher Campisano and others.

National Science Foundation, Sedimentary Geology and Paleobiology Program, Collaborative Research: The hominid sites and paleolakes drilling project: Acquiring a high-resolution paleoenvironmental context of human evolution, $215,231, co-PI with Christopher Campisano and others.

National Science Foundation, Arctic Natural Sciences Program: Acidification in the Arctic Ocean: Roles of Sea Ice. $201,190, lead PI with Lisa Robbins.

National Science Foundation, Intergovernmental Personnel Act replacement grant while on rotator position at NSF, $266,530.

2016 Publications

2016. Wynn, J.G., Robbins, L.L., Anderson, L.G. Processes of multibathyal aragonite undersaturation in the Arctic Ocean, Journal of Geophysical Research-Oceans 212, doi: 10.1002/2016JC011696.

2016. Shen, Y., Benner, R., Robbins, L.L., Wynn, J.G. Sources and distributions of dissolved organic carbon and chromophoric dissolved organic matter across the Canada and Makarov Basins, Frontiers in Marine Science 3, 198, doi: 10.3389/fmars.2016.00198.

2016. Cleary, D.M., Onac, B.P., Forray, F.L., Wynn, J.G., Effect of diet, anthropogenic activity and climate on δ15N values of cave bat guano, Palaeogeography, Palaeoclimatology, Palaeoecology 461, 87-97, doi: 10.1016/j.palaeo.2016.08.012.

2016. Wynn, J.G., Reed, K.E., Sponheimer, M., Kimbel, W.H, Alemseged, Z., Bedaso, Z.K., Campisano, C.J., Dietary flexibility of Australopithecus afarensis in the face of paleoecological change during the middle Pliocene: faunal evidence from Hadar, Ethiopia, Journal of Human Evolution 99, 93-106, doi: 10.1016/j.jhevol.2016.08.002.

2016. Rowan, J., Locke, E.M., Robinson, J.R., Campisano, C.J., Wynn, J.G., Reed, K.E., Fossil Giraffidae (Mammalia, Artiodactyla) from Lee Adoyta, Ledi-Geraru and late Pliocene dietary evolution in giraffids from the lower Awash Valley, Ethiopia, Journal of Mammalian Evolution, doi: 10.1007/s10914-016-9343-z.

2016. Robbins, L.L., Knorr, P.O., Wynn, J.G., Hallock, P., Harries, P.J., Interpreting the role of pH on stable isotopes in large benthic foraminifera, ICES Journal of Marine Science, doi:10.1093/icesjms/fsw056.

2016. Cohen, A., Campisano, C., Arrowsmith, R., Behrensmeyer, A.K., Deino, A., Feibel, C.S., Hill, A., Johnson, R., Kingston, J., Lamb, H., Lowenstein, T., Noren, A., Olago, D., Owen, R.B., Potts, R., Reed, K., Renaut, R., Schäbitz, F., Tiercelin, J.-J., Trauth, M., Wynn, J.G., Ivory, S., Brady, C., O’Grady, R., Rodysill, J., Githiri, J, Russel, J. Foersterer, V., Dommain, R., Rucina, S., Deocampo, D., Billingsley, A., Beck, C., Dullo, L., Feary, D., Garello, D., Johnson, T., Juninger, A., Karanja, M., Kumburi, E., Mbuthia, A., McCartney, T., McNulty, E., Muiriri, V., Nambiro, E., Njagi, D., Norman, J., Rabideaux, N., Raub, T., Sier, M., Smith, P., Urban, J., Warren, M., Negash, E., Yost, C., The Hominin Sites and Paleolakes Drilling Project: Inferring the Environmental Context of Human Evolution from Eastern African Rift Lake Deposits, Scientific Drilling 21, 1-16, doi:10.5194/sd-21-1-2016.

Research Facilities.

USFSI - USF Stable Isotope Laboratory




University of South Florida external link

USF College of Arts & Sciences external link

USF Geology external link

Contact Information

SCA 509

Geology Department
University of South Florida
4202 E Fowler Ave, SCA528
Tampa, FL 33620

+1 (813) 974-9369
+1 (813) 974-5278 (lab)
+1 (813) 974-2654 (fax)

jwynn (...)


  • GLY 6739. Principles of Stable Isotope Geochemistry
  • GLY 6825. Analytical Techniques in Geology (co-taught w/J. Ryan, T. Pichler)
  • GLY 4930. Critical Zone Biogeochemistry
  • GLY 4930. Geomechanics (co-taught with D. Roman)
  • GLY 2100. History of Life