The Mid-Atlantic Regional Assessment: motivation and approach

The US Global Change Research Program has initiated a National Assessment o f potential impacts from climate change. This paper summarizes the National Assessment process, and the Mid-Atlantic Regional Assessment (MARA) as an example of how the process is being implemented. At the national level, 5 s ectoral working groups are assessing impacts on agriculture, forests, fresh water resources, coastal zones and human health. Because different areas of the country will experience impacts to differing degrees, regional assessm ents simultaneously are examining sectoral impacts identified as likely to be most important within each of 18 US regions. An independent panel of exp erts, the National Assessment Synthesis Team, is synthesizing the sectoral and regional findings for a national report that provides regional texture. The approach adopted for the MARA is described in the context of the Natio nal Assessment process. Such a complex undertaking relies on multiple exten sive data sets. The MARA approach to managing the diverse data sets is outl ined as a potential guide for similar efforts.