Dr. Judah Cohen of Atmospheric and Environmental Research will present a lecture on "AO impacts on winter climate" as part of the MIT Atmospheric Seminar Series. About the Speaker: Dr. Cohen joined AER as a staff scientist in 1998, having previously spent two years as a National Research Council Fellow at the NASA Goddard Institute for Space Studies and then two years as a research scientist at MIT's Parsons Laboratory. Cohen received his Ph.D. in Atmospheric Sciences from Columbia University in 1994 and has since focused on conducting numerical experiments with global climate models and advanced statistical techniques to better understand climate variability and to improve climate prediction. In addition to his research interests, Cohen is leading AER's development of seasonal forecasts for commercial clients.