Evolution of the Earth System I

Friday, 19 December 2014: 8:00 AM-10:00 AM
Chairs:  Colin Goldblatt1, Benjamin W Johnson1 and Paul F Hoffman2, (1)University of Victoria, Victoria, BC, Canada(2)Organization Not Listed, Washington, DC, United States
Primary Conveners:  Colin Goldblatt, University of Victoria, Victoria, BC, Canada
Co-conveners:  Benjamin W Johnson, University of Victoria, Victoria, BC, Canada and Paul F Hoffman, University of Victoria, Victoria, BC, Canada; University of Victoria, Victoria, BC, Canada
OSPA Liaisons:  Colin Goldblatt, University of Victoria, Victoria, BC, Canada

Abstracts Submitted to this Session:

8:00 AM
The State of the Earth's Atmosphere 3.5 Ga Ago
Bernard Marty, Guillaume Avice and Maia Kuga, CRPG-CNRS,Université de Lorraine, Vandoeuvre les Nancy, France
8:15 AM
Sulfur Isotope Trends in Archean Microbialite Facies Record Early Oxygen Production and Consumption
Aubrey Zerkle1, Nicolette Meyer1, Gareth Izon1, Simon Poulton2, James Farquhar3 and Mark Claire4, (1)University of St Andrews, St Andrews, United Kingdom, (2)University of Leeds, Leeds, United Kingdom, (3)University of Maryland College Park, College Park, MD, United States, (4)University of St Andrews, Department of Earth and Environmental Sciences, St Andrews, United Kingdom
8:30 AM
Evolution of the Proterozoic Earth System: Insights from the ∆17O Record of Sedimentary Sulfate Minerals
Peter William Crockford1, Justin A Hayles2, Galen P Halverson1, Andrey Bekker3, Robert Rainbird4 and Boswell A Wing1, (1)McGill University, Earth and Planetary Sciences, Montreal, QC, Canada, (2)Louisiana State Univ., Department of Geology & Geophysics, Baton Rouge, LA, United States, (3)University of California Riverside, Earth Sciences, Riverside, CA, United States, (4)Geological Survey of Canada, Ottawa, ON, Canada
8:45 AM
The nitrogen cycle in the aftermath of the mid-Cryogenian snowball Earth glaciation.
Christopher K Junium1, Matthew Hurtgen2, Susannah Porter3, Galen P Halverson4 and Leigh Ann Riedman3, (1)Syracuse University, Syracuse, NY, United States, (2)Northwestern University, Evanston, IL, United States, (3)University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States, (4)McGill University, Montreal, QC, Canada
9:00 AM
Co-evolution of Eukaryotes and Ocean and Atmosphere Oxygenation in the Neoproterozoic and Paleozoic Eras
Tim Michael Lenton1, Stuart J Daines1, Benjamin Mills1 and Richard A Boyle2, (1)University of Exeter, Exeter, United Kingdom, (2)University of Southern Denmark, Biology, Odense, Denmark
9:15 AM
Variation of Atmospheric Oxygen in the Phanerozoic Recorded By δ13c of Terrestrial Organic Matter
Karlis Muehlenbachs1, Ralf Tappert2, Ryan McKellar1, Alex P Wolfe1, Michelle Tappert1 and Martin Schoell3,4, (1)University of Alberta, Edmonton, AB, Canada, (2)University of Innsbruck, Institute of Mineralogy and Petrography, Innsbruck, Austria, (3)Retired, Washington, DC, United States, (4)GasConsult International Inc., Berkeley, CA, United States
9:30 AM
Can nitrogen cycle feedbacks lead to runaway denitrification and deoxygenation of the ocean?
Thomas S Weber, University of Washington Seattle Campus, Seattle, WA, United States and Curtis A Deutsch, University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States
9:45 AM
A Quarter Century Record of Stratospheric Sulfate Aerosol: implication for the past, present and future climates
Robina Shaheen1, M Abaunza1, Teresa Lou Jackson1, J McCabe2, J Savarino3 and Mark H Thiemens1, (1)University of California San Diego, Chemistry, La Jolla, CA, United States, (2)WPacific Ridge School, Carlsbad, CA, United States, (3)LGGE Laboratoire de Glaciologie et Géophysique de l’Environnement, Saint Martin d'Hères, France