A Transient Simulation of the Last 800 Thousand Years

Monday, 15 December 2014
Tobias Friedrich1, Axel Timmermann1, Andrey Ganopolski2 and Oliver Elison Timm3, (1)IPRC-SOEST, Honolulu, HI, United States, (2)Potsdam Institute for Climate Impact Research, Potsdam, Germany, (3)State University of New York, Department of Atmospheric and Environmental Sciences, Albany, NY, United States
Using the earth system model of intermediate complexity LOVECLIM with time-varying greenhouse gas concentrations, orbitally-induced insolation changes and a model-based reconstruction of Northern Hemisphere ice volume, a transient simulation of the last 784 thousand years is conducted. The modeling results are compared to numerous marine and terrestrial paleo-datasets and exhibit good agreement for many records. Furthermore it is shown how simulated orbital-scale variations in Southern Hemispheric wind stress and sea-ice extent drive changes in Southern Ocean upwelling and meridional overturning and thus in global ocean ventilation. The simulation results are being made available for the paleo-community and provide a unique opportunity to help understand and interpret the temporal evolution of paleo-records.