HR: 15:15h
AN: PP53D-07    [Abstracts]
TI: Modelling Climate-Vegetation Interactions With a Paleoclimate Earth System Model
AU: * Schurgers, G
EM: schurgers@dkrz.de
AF: Max Planck Institute for Meteorology, Bundesstrasse 53, Hamburg, D-20146 Germany
AU: Mikolajewicz, U
EM: mikolajewicz@dkrz.de
AF: Max Planck Institute for Meteorology, Bundesstrasse 53, Hamburg, D-20146 Germany
AU: Groeger, M
EM: groeger@dkrz.de
AF: Max Planck Institute for Meteorology, Bundesstrasse 53, Hamburg, D-20146 Germany
AU: Maier-Reimer, E
EM: maier-reimer@dkrz.de
AF: Max Planck Institute for Meteorology, Bundesstrasse 53, Hamburg, D-20146 Germany
AU: Vizcaino, M
EM: vizcaino-trueba@dkrz.de
AF: Max Planck Institute for Meteorology, Bundesstrasse 53, Hamburg, D-20146 Germany
AU: Winguth, A
EM: amwinguth@wisc.edu
AF: Center for Climatic Research, Department of Atmospheric and Oceanic Sciences, University of Wisconsin, 1225 W. Dayton St., Madison, WI 53706 United States
AB: A complex coupled earth system model for paleoclimate studies, consisting of an atmosphere and ocean general circulation model, a dynamic terrestrial vegetation and ocean biogeochemistry model and a thermodynamic icesheet model, is being developed. The model will enable studying the feedbacks within as well as between the various components of the earth system. The atmosphere and ocean GCM, together with the dynamic vegetation model, were applied for time slice experiments for 125 ky B.P. and 115 ky B.P. To investigate the effect of biophysical climate-vegetation interactions, the experiments were performed with a dynamic vegetation as well as with a prescribed (present-day potential) vegetation. A comparison of the results shows that changes in the vegetation can cause large changes in climate in places where positive feedbacks between the climate and the vegetation can enhance the insolation effects, e.g. in the Sahara region (vegetation-albedo feedback) and in the boreal forest regions in high latitudes (forest-snow-albedo feedback).
UR: http://www.mpimet.mpg.de/en/depts/dep3/oph/deklim.html
DE: 3322 Land/atmosphere interactions
DE: 3339 Ocean/atmosphere interactions (0312, 4504)
DE: 3344 Paleoclimatology
DE: 1615 Biogeochemical processes (4805)
DE: 1620 Climate dynamics (3309)
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2004 AGU Fall Meeting