News & Events

Grad student talk - Past climate variability: Model analysis and proxy intercomparison

Thursday, September 30, 2010, 4:30PM - 5:30PM

Speaker

Francesco Pausata

University of Bergen

Location:

RL-1 269

By comparing model simulations and proxy data we provide new insights into atmospheric climate variability in the North Atlantic region during the late Quaternary (21,000 yr BP to present day). By analyzing a set of climate model simulations for the Last Glacial Maximum (LGM) and the Pre-industrial we describe the character of past atmospheric circulation variability and investigate the mechanisms behind it. Moreover, we analyze the impact of our findings on proxy records of past North Atlantic climate variability.

Further, by comparing proxy data with a model simulation of the Mid-Holocene we address the controversy regarding different temperature trends recorded by marine proxies in the North Atlantic Ocean.

Finally we tackle the impact of abrupt climate changes in the North Atlantic, such as Heinrich events, on Asian monsoon systems and on what in turn is actually recorded by cave deposits in southern and eastern Asia.