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).
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This assessment report presents the results of the 2016 AMAP Assessment of Chemicals of Emerging Arctic Concern. This assessment updates the AMAP POPs assessments delivered in 1998, 2002 and 2009, specifically with respect to information on chemicals newly identified in the Arctic environment.
This report presents the results of the 2017 AMAP Assessment of Adaptation Actions for a Changing Arctic (AACA).
This is one of the three pilot study regions included in the AACA project. AACA is the first AMAP assessment dealing with adaptation actions and how to meet possible Arctic...
This report presents the results of the 2017 AMAP Assessment of Adaptation Actions for a Changing Arctic (AACA): Perspectives from the Barents Area.
This is one of the three pilot study regions included in the AACA project. AACA is the first AMAP assessment dealing with adaptation actions and how to meet possible Arctic...
This report presents the findings of the Snow, Water, Ice, and Permafrost in the Arctic (SWIPA) 2017 assessment performed by the Arctic Monitoring and Assessment Programme (AMAP).
This Summary for Policymakers presents key findings and implications of the second SWIPA assessment, conducted from 2010 to 2016 and published in 2017. SWIPA focuses on changes to the Arctic cryosphere (the portion of Arctic land and water that is seasonally or perennially frozen), and the implications of those changes.
This policy summary refers to the most recent AMAP assessment which looks at a wide range of chemicals newly and recently detected in Arctic ecosystems . The report presents the policy-relevant findings of the AMAP 2017 assessments of CEAC.
As a key part of the Fourth National Climate Assessment (NCA4), the U.S. Global Change Research Program (USGCRP) oversaw the production of this stand-alone report of the state of science relating to climate change and its physical impacts.
The Climate Science Special Report (CSSR) is designed to be an authoritative assessment of the science of climate change,...