PP33A:
Silicate Weathering Through Earth History I
Submit an Abstract to this Session
Session ID#: 6818
Session Description:
Many past climate changes, from throughout Earth history, have been shown to have covaried with atmospheric CO2. On timescales greater than a few hundred ky, the primary control on atmospheric CO2 is silicate weathering. Theoretical arguments suggest that the feedback of temperature on silicate weathering must be strong, yet fundamental process understanding of this feedback is lacking. Uncertainties include the effects of runoff, vegetation, glacial erosion and surface rock type, as well as the ways in which these variables interact with the climate state. We invite contributions from both modern process studies and geological archives that help to better constrain the role of silicate weathering in Earth history. These could include field observations, paleoclimatic records, pCO2 reconstructions, and numerical modelling.
OSPA Liaison: Eric D Galbraith, McGill University, Montreal, QC, Canada
Chairs: Eric D Galbraith, McGill University, Montreal, QC, Canada and Grant M Cox, University of Adelaide, Adelaide, Australia
Primary Convener: Eric D Galbraith, McGill University, Earth and Planetary Sciences, Montreal, QC, Canada
Convener: Grant M Cox, University of Adelaide, Adelaide, Australia
Abstracts Submitted to this Session:
Wandering, uplifting, and eroding continents: impact on silicate weathering and carbon cycle (Invited) (34260)
Yves Godderis, GET CNRS, Toulouse, France, Yannick Donnadieu, LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France, Sebastien Carretier, Geosciences Environnement Toulouse, Toulouse, France and Galen P Halverson, McGill University, Earth and Planetary Sciences, Montreal, QC, Canada
Continental Magmatic Arcs as Drivers of Neoproterozoic and Phanerozoic Icehouse-Greenhouse Transitions (35525)
Ryan McKenzie1,2, Brian K Horton3, Daniel F Stockli4 and Shannon E Loomis2, (1)Yale University, Geology and Geophysics, New Haven, CT, United States, (2)University of Texas at Austin, Department of Geological Sciences, Austin, TX, United States, (3)University of Texas at Austin, Department of Geological Sciences and Institute for Geophysics, Austin, TX, United States, (4)University of Texas at Austin, Jackson School of Geosciences, Austin, United States
Coupled tectonic-ocean-atmosphere-weathering-pCO2 feedback as a trigger for Eocene-Oligocene Antarctic glaciation (33852)
Geneviève Elsworth1, Eric D Galbraith2 and Galen P Halverson1, (1)McGill University, Earth and Planetary Sciences, Montreal, QC, Canada, (2)McGill University, Montreal, QC, Canada
Testing for supply-limited and kinetic-limited chemical erosion in field measurements of regolith production and chemical depletion (Invited) (35031)
Ken Ferrier, Georgia Institute of Technology, Earth and Atmospheric Sciences, Atlanta, GA, United States, Clifford S Riebe, University of Wyoming, Laramie, United States and William Jesse Hahm, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States
The Importance of Terrestrial Weathering for Climate System Modelling on Extended Timescales: A Study with the UVic ESCM (34751)
Marc-Olivier Brault1, Lawrence A Mysak1, Damon Matthews2 and Christopher T Simmons1, (1)McGill University, Montreal, QC, Canada, (2)Concordia University, Department of Geography, Planning and Environment, Montreal, QC, Canada
Global carbon burial in deep-sea sediment across the last glacial cycle based on a comprehensive sediment proxy database. (34763)
Olivier antonin Cartapanis1,2, Eric D Galbraith3 and Daniele Bianchi1, (1)McGill University, Montreal, QC, Canada, (2)Bern University, Bern, Switzerland, (3)McGill University, Earth and Planetary Sciences, Montreal, QC, Canada
