The Fifth National Climate Assessment was released in November 2023. Please visit globalchange.gov/nca5 for information on the Assessment development process and engagement opportunities.
USGCRP has initiated development of the Sixth National Climate Assessment. Please visit globalchange.gov/nca6 for information on the Assessment development process and engagement opportunities.
El Cambio Global de Estados Unidos (US Global Change Research Program, USGCRP) ha iniciado el desarrollo de La Sexta Evaluación Nacional del Clima (Sixth National Climate Assessment, NCA6). Para obtener más información sobre el proceso de desarrollo de la evaluación y oportunidades para participar, por favor visite https://www.globalchange.gov/nca6-espanol.
USGCRP has four major sets of responsibilities, as defined by the Global Change Research Act (GCRA): a) coordinating global change research across the Federal Government, b) developing and distributing mandated products, c) helping to inform decisions, and d) facilitating international research coordination.
In addition to an annual report to Congress and a Strategic Plan, the GCRA requires USGCRP to develop a quadrennial assessment, referred to as the National Climate Assessment, which:
Integrates, evaluates, and interprets the findings of the Program and discusses the scientific uncertainties associated with such findings
Analyzes the effects of global change on the natural environment, agriculture, energy production and use, land and water resources, transportation, human health and welfare, human social systems, and biological diversity
Analyzes current trends in global change, both human-induced and natural, and projects major trends for the subsequent 25 to 100 years
Past National Climate Assessments and other USGCRP assessment reports:
Fourth National Climate Assessment, Vol. II: Impacts, Risks, and Adaptation in the United States (2018)
Fourth National Climate Assessment, Vol. I: Climate Science Special Report (2017)
Global Climate Change, Food Security, and the U.S. Food System(2015)
Climate Change Impacts In the United States (NCA3; 2014)
Global Climate Change Impacts in the United States (NCA2; 2009)
Climate Change Impacts on the United States: The Potential Consequences of Climate Variability and Change (NCA1; 2001)