• Fourth National Climate Assessment Volume II

    Read NCA4 Vol. II: Impacts, Risks, and Adaptation in the United States, USGCRP’s quadrennial assessment of the impacts of climate change in the U.S.

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  • 2nd State of the Carbon Cycle Report

    SOCCR2 is a technical assessment of the state of carbon cycle science in North America

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  • Climate Science Special Report

    The Climate Science Special Report, Volume I of the Fourth National Climate Assessment (NCA4), assesses the physical science of climate change and provides the foundation for Volume II of NCA4.

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  • Our Changing Planet: USGCRP for Fiscal Years 2018-2019

    Read USGCRP’s annual report to Congress describing recent program accomplishments.

    Read OCP FY2018-19
  • Melting sea ice is one indicator of climate change

    Indicators of Change

    Indicators communicate key aspects and related effects of the changing climate. 

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