Co-Chair, New York City Panel sa Climate Change Co-Leader, Metropolitan East Coast Regional Assessment kan U.S. National Assessment kan Potential Consequences of Climate Variability and Change, sponsored by the U.S. Global Change Research Program Coordinating Lead Author kan IPCC Working Group II Fourth Assessment Report ("Observed Changes" chapter) Coordinating Lead Author kan IPCC Special Report on Climate Change and Land Member, IPCC Task Group sa Data and Scenarios for Impact and Climate Assessment Co-Editor, UCCRN First Assessment Report sa Climate Change and Cities (ARC3).