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Projected change in mean seasonal precipitation (%) for the contiguous United States, for 2041–2070 with respect to the reference period of 1971–2000.

The National Oceanic and Atmospheric Administration (NOAA) recently released two reports that provide detailed comparisons of phases 3 and 5 of the Coupled Model Intercomparison Project (CMIP3 and CMIP5) for the United States. Understanding the strengths of these simulations and the differences among models is important for sustained assessment

Dr. James R. Mahoney, the Director of the U.S. Climate Change Science Program ( CCSP ) 1 from 2002- 2006, passed away on Wednesday, September 23. He was 77. Dr. Mahoney was well-respected for his ability to fuse science and policy. He served as Assistant Secretary of the Department of Commerce and Deputy Administrator of the National Oceanic and

By Dr. Kathryn Sullivan Decision-makers across the nation are increasingly focused on anticipating, mitigating, and adapting to climate change . That’s why the President’s Climate Action Plan emphasizes the importance of “actionable science”: scientific findings tailored to assist decision makers and citizens in anticipating and preparing for

USGCRP would like to thank everyone who participated in the recent public comment periods for the draft Climate and Health Assessment (The Impacts of Climate Change on Human Health in the United States: A Scientific Assessment) and the sustained National Climate Assessment (NCA) process.

A NOAA-led study refutes the much-publicized idea that there has been a recent slowdown or “hiatus” in the rate of global warming . The study finds that global warming during the last 15 years has progressed as fast or faster than during the latter half of the 20th century.

The latest edition of Our Changing Planet, USGCRP's annual report to Congress, highlights progress in advancing science, informing decisions, conducting assessments, and engaging with diverse audiences. The report also spotlights interagency priority areas, including climate predictions, global change in the Arctic, water extremes, and actionable science.

Broken-up ice on the coast of Antarctica

The last remaining piece of Antarctica’s Larsen B Ice Shelf will likely disintegrate by the end of this decade, according to a new NASA-led study. The ice shelf, which partially collapsed in 2002, has existed for at least 10,000 years.

By Dr. Tamara Dickinson A year ago today, hundreds of the country’s top climate scientists confirmed that climate change is affecting every region across America in the third U.S. National Climate Assessment (NCA) – the most comprehensive scientific report on domestic climate change impacts ever generated. Since then, communities, localities, and

A new section of GlobalChange.gov features indicators that visually communicate some of the key aspects and effects of climate change . Users can provide feedback to help shape a broader indicators system that will inform the next National Climate Assessment.

A Request for Information issued today seeks public input on next steps for the U.S. National Climate Assessment. Ongoing stakeholder engagement is key to USGCRP's sustained assessment process.

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Latest News

Strengthening Sustained Assessment with Climate Simulations

Remembering James Mahoney

Nomination Period Open for the Sustained National Climate Assessment Federal Advisory Committee

Public Comments: Your Input Counts

Global Warming "Hiatus" Never Happened: New Study

Annual Report Highlights Scientific Progress, Societal Value

Antarctic Ice Shelf Faces Imminent Demise

Connecting America’s Communities with Actionable Climate Science

New on GlobalChange.gov: Climate Change Indicators

Seeking Public Input on the Sustained National Climate Assessment