Dr. Josef Werne

Associate Professor

Biogeochemistry

Office: Chem 134/RLB 205

Phone: (218) 726-7426 (7435)

Fax: (218) 726-7394

E-mail: jwerne@d.umn.edu

• Ph.D. 2000 Northwestern University

• Postdoctoral Research Associate, Royal Netherlands Institute for Sea Research (NIOZ) 2000-2002



Research Interests

Representative Publications

  1. * denotes student and postdoc authors
  2. 1. Werne, J.P., D.J. Hollander, T.W. Lyons, L.C. Peterson (2000) Climate-induced variations in productivity and planktonic ecosystem structure from the Younger Dryas to Holocene in the Cariaco Basin, Venezuela Paleoceanography, v. 15, no. 1, pp. 19-29.
  3. 2. Werne, J.P., D.J. Hollander, A. Behrens, P. Schaeffer, P. Albrecht, J.S. Sinninghe Damsté (2000) Timing of early diagenetic sulfurization of organic matter: A precursor-product relationship in Holocene sediments of the anoxic Cariaco Basin, Venezuela, Geochimica et Cosmochimica Acta, v. 64, no. 10, pp. 1741-1751.
  4. 3. Werne, J.P., B.B. Sageman, T.W. Lyons, and D.J. Hollander (2002) An integrated assessment of a “type euxinic” deposit: Evidence for multiple controls on black shale deposition in the middle Devonian Oatka Creek Formation. American Journal of Science, v. 302, pp. 110-143.
  5. 4. Werne, J.P., M. Baas, J.S. Sinninghe Damsté (2002) Molecular isotopic tracing of carbon flow and trophic relationships in a methane-supported microbial community. Limnology & Oceanography v. 46 no. 6, p. 1694-1701.
  6. 5. Werne, J.P., T.W. Lyons, D.J. Hollander, M.J. Formolo, J.S. Sinninghe Damsté (2003) Reduced sulfur in euxinic sediments of the Cariaco Basin: sulfur isotope constraints on organic sulfur formation. Chemical Geology v. 195, p. 159-179.
  7. 6. Powers*, L., Werne, J.P., Johnson, T.C., Hopmans, E.C., Sinninghe Damste, J.S.S., and Schouten, S. (2004) Crenarchaeotal membrane lipids in lake sediments: a new paleotemperature proxy for continental paleoclimate reconstruction? Geology, v. 32, no. 7, p. 613-616.
  8. 7. Werne, J.P. and D.J. Hollander (2004) Balancing supply and demand: Controls on carbon isotope fractionation in the Cariaco Basin (Venezuela) Younger Dryas to Present. Marine Chemistry. v. 92, no. 1-4, pp. 275-293.
  9. 8. Powers*, L., T.C. Johnson, J.P. Werne, I. Castañeda*, E.C. Hopmans, J.S. Sinninghe Damsté, S. Schouten (2005) Large temperature variability in the southern African tropics since the Last Glacial Maximum. Geophysical Research Letters. 32, L08076, doi:10.1029/2004GL022014.
  10. 9. Russell*, J., Werne, J.P. (2007) The use of solid phase extraction chromatographic columns in fatty acid purification. Organic Geochemistry. v. 38, p. 48-51.
  11. 10. Castañeda*, I., Werne, J.P., Johnson, T.C. (2007) Wet/arid phases in the southeast African tropics since the Last Glacial Maximum. Geology. v. 35, no. 9, pp. 823-826.
  12. 11. Donahue*, M., J.P. Werne, C. Meile, T.W. Lyons (2008) Modeling the effects of fractionation and differential diffusion on the sulfur isotope signature of sulfate reduction in Cariaco Basin sediments. Geochimica et Cosmochimica Acta. In press.

Education

Jobs and Academic Positions