Fourth National Climate Assessment Vol I + II

NCA4 Vol II: Impacts, Risks, and Adaptation in the United States
NCA4 Vol I: Climate Science Special Report
The Reports Library features scientific assessments, annual reports, strategic research plans, and other resources produced by USGCRP and the collaborative efforts of our member agencies. Select reports by other authoritative scientific bodies with whom we work, such as the Intergovernmental Panel on Climate Change (IPCC) and the National Research Council (NRC), are also accessible here. Most reports are available for download (open and click View); some can be ordered in print free of charge (open and click Add to Cart).
Please note that we are currently experiencing shipping delays of at least two weeks. Thank you for your patience.

This publication includes the Summary for Policymakers, Technical Summary, Frequently Asked Questions, and Cross-Chapter Boxes for the Working Group II contribution to the IPCC Fifth Assessment Report.
AMAP’s assessment of the impacts of climate change on Snow, Water, Ice and Permafrost in the Arctic (SWIPA) brings together the latest scientific knowledge about the changing state of each component of the Arctic cryosphere.
Executive Summary of SAP Assessment 4.3, one of a series commissioned by the U.S. Global Change Research Program(USGCRP). It examines how climate changes are affecting agriculture, land resources, water resources and biodiversity in the United States.
This report is the Second National Climate Assessment. It summarizes the science of climate change and the impacts of climate change on the United States, now and in the future.
4-page Companion Brochure of the Global Climate Change Impacts in the United States. A report of the U.S. Global Change Research Program. Published in 2009.
20-page Highlight Booklet of the Global Climate Change Impacts in the United States. A report of the U.S. Global Change Research Program. Published in 2009.
This report, the First National Climate Assessment, includes analyses of the importance of climate variability and change for twenty regions around the United States, for five cross-cutting sectors, and for the United States as a whole. The DVD contains background information, public review drafts and final reports, citations, and high-resolution images.
The Effects of Climate Change on Agriculture, Land Resources, Water Resources, and Biodiversity. A Report by the U.S. Climate Change Science Program and the Subcommittee on Global Change Research.
Decision-Support Experiments and Evaluations using Seasonal-to-Interannual Forecasts and Observational Data: A Focus on Water Resources. A Report by the U.S. Climate Change Science Program and the Subcommittee on Global Change Research.
Findings, Summary, and Frequently Asked Questions of the U.S. Climate Change Science Program Synthesis and Assessment Report 5.3 "Decision-Support Experiments and Evaluations using Seasonal-to-Interannual Forecasts and Observational Data: A Focus on Water Resources".