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Geological Sciences Seminar: Mark Torres, California Institute of Technology - "River Deep, Mountain High: a fluvial perspective on the carbon cycle"

Date and Time: 
May 23, 2017 -
12:10pm to 1:10pm
Location: 
GeoCorner, Room 220
Contact Email: 
julieh1@stanford.edu
Contact Phone: 
650-724-8437
Event Sponsor: 
Department of Geological Science

Over geologic timescales, large masses of carbon are exchanged between surface reservoirs and the solid Earth. Imbalances in these carbon fluxes have the potential to drastically alter the concentration of carbon dioxide in the atmosphere and, by extension, the climate system. While Earth’s long-term habitability precludes major imbalances, there remain open questions as to how surface processes, like chemical weathering, stabilize the carbon cycle. Here, using new observations of river chemistry, we evaluate existing weathering models as well as show how the coupling between carbon and sulfur during chemical weathering acts to stabilize the carbon cycle in response to tectonic forcing and may play a role as a negative climate feedback through glaciation.