HR: 14:40h
AN: PP22B-05    [PDF]
TI: Continental Break-up And Global Climatic Evolution
AU: * Donnadieu, Y
EM: tiphe@lsce.saclay.cea.fr
AF: LSCE, Bat 709/ Orme des Merisiers CE Saclay, Gif sur Yvette, 91191 France
AU: Godderis, Y
EM: godderis@lmtg.ups-tlse.fr
AF: Universite Paul-Sabatier UMR 5563 - LMTG, 38 rue des 36-ponts, Toulouse, 31400 France
AU: Ramstein, G
EM: ramstin@lmtg.ups-tlse.fr
AF: LSCE, Bat 709/ Orme des Merisiers CE Saclay, Gif sur Yvette, 91191 France
AU: Meert, J
EM: jmeert@geology.ufl.edu
AF: Department of Geological Sciences University of Florida, 241 Williamson Hall, Gainesville, FL 32601 United States
AB: The global cooling of the Earth at the end of the Proterozoic (750-550 Ma), possibly resulting in successive global glaciations, has been linked to the concomitant fragmentation of the long-lived supercontinent Rodinia. By coupling an ocean-atmosphere climate model to a global carbon cycle model, we show that the break-up of Rodinia induces a significant decrease in atmospheric pCO2 of 1320 ppm due to the intense runoff occurring in a dispersed continental configuration, and results in a progressive transition from a `greenhouse' to an `icehouse' climate.
DE: 0330 Geochemical cycles
DE: 1620 Climate dynamics (3309)
DE: 8125 Evolution of the Earth
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2003 Fall Meeting