US National Assessment of the Potential Consequences of Climate Variability and Change : a Detailed Overview of the Consequences of Climate Change and Mechanisms for Adaptation

US Climate Change Science Program, National Assessment Synthesis Team
http://www.usgcrp.gov/usgcrp/nacc/

This site includes links to an Overview, a more detailed Foundation Report,  regional assessments and assessments for five regions: forests, agriculture, water, health, and coastal areas and marine resources. This report is also available on dvd.