Climate Change is one of the defining issues of the 21st Century. Dr. Trenberth’s research on the link between extreme weather and climate change, as well as his observations on possible options for adapting to and mitigating the effects of climate change, are helping to shape international negotiations and government policy. Dr. Kevin Trenberth is a distinguished senior scientist in the Climate Analysis Section at the National Center for Atmospheric Research. A New Zealander, Dr. Trenberth obtained his doctorate from MIT. Trenberth and has been prominent in most of the United Nations Intergovernmental Panels on Climate Change (IPCC) scientific assessments of Climate Change. He has also served the World Climate Research Programme (WCRP) in numerous ways, most recently as Chair of the WCRP Global Energy and Water Exchanges Project.