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.

The FY2021 edition of USGCRP’s annual report to Congress, Our Changing Planet, responds to the Global Change Research Act mandate to provide an overview of the Program’s progress in delivering on its strategic goals as well as a summary of agency expenditures under USGCRP’s budget crosscut.
The FY2018–19 edition of USGCRP’s annual report to Congress, Our Changing Planet, responds to the Global Change Research Act mandate to provide an overview of the Program’s progress in delivering on its strategic goals as well as a summary of agency expenditures under USGCRP’s budget crosscut.
This FY 2017 edition of Our Changing Planet includes an overview of the USGCRP research enterprise and recent highlights that demonstrate how the Program is fulfilling its 2012–2021 Strategic Plan. The report also spotlights progress in interagency research priority areas that intersect with President Obama’s Climate Action Plan, such as Arctic research and resilience, methane cycling in the context of the carbon...
This FY 2016 edition of Our Changing Planet, USGCRP's annual report, summarizes the Program's significant advancements toward achieving its scientific goals, delivering on its Congressional mandate, supporting the President’s Climate Action Plan, and building a knowledge base that effectively informs human responses to global change.
USGCRP's annual report for FY 2015 highlights recent progress in achieving the Program's research goals and building a knowledge base that effectively informs human responses to global change.
USGCRP's annual report for FY 2014 highlights recent progress in achieving the Program's research goals and building a knowledge base that effectively informs human responses to global change.
A report by the U.S. Global Change Research Program and the Subcommittee on Global Change Research. A supplement to the President's Budget for Fiscal Year 2013.
A report by the U.S. Global Research Program and the Subcommittee on Global Change Research. A Supplement to the President's Budget for Fiscal Year 2012.
A report by the U.S. Global Change Research Program and the Subcommittee on Global Change Research. A supplement to the President's Budget for Fiscal Year 2011.