Fourth National Climate Assessment

Fourth National Climate Assessment

The Global Change Research Act of 1990 mandates that the U.S. Global Change Research Program (USGCRP) deliver a report to Congress and the President no less than every four years that “1) integrates, evaluates, and interprets the findings of the Program…; 2) 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; and 3) analyzes current trends in global change, both human-induced and natural, and projects major trends for the subsequent 25 to 100 years.”

The Fourth National Climate Assessment (NCA4) fulfills that mandate in two volumes: Volume I, the Climate Science Special Report (CSSR) and Volume II, Impacts, Risks, and Adaptation in the United States, which focuses on the human welfare, societal, and environmental elements of climate change and variability for 10 regions and 18 national topics, with particular attention paid to observed and projected risks, impacts, consideration of risk reduction, and implications under different mitigation pathways. Where possible, NCA4 Volume II provides examples of actions underway in communities across the United States to reduce the risks associated with climate change, increase resilience, and improve livelihoods.

Chapters of Interest:

15. Tribes & Indigenous Peoples

Regions of Interest:

18. Northeast

19. Southeast

Related Resources:

On January 26, 2021, SE CASC affiliates Aranzazu Lascurain (Assistant University Director SE Climate Adaptation Science Center) and Ryan Boyles (Deputy Federal Director SE Climate Adaptation Science Center) presented information on the Fourth National Climate Assessment and the use of climate data and projections in climate adaptation plans during USET’s first Virtual Climate Change Vulnerability Assessment/Adaptation Plan Writing Retreat. Access the recording and slide deck from that session.