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National Climate Assessment
File:NCA5 2023 FullReport.pdf The National Climate Assessment (NCA) is an initiative within the U.S. federal government focused on climate change science, formed under the auspices of the Global Change Research Act of 1990. The U.S. Global Change Research Program (USGCRP) which coordinates a team of experts and receives input from a Federal Advisory Committee. The first National Climate Assessment was published in 2000. Since four additional reports have been published, with the Fifth report published in 2023.
Work halted in 2025 on the 6th when funding was eliminated during the second Trump Administration. The scientists and experts who had been compiling the report were then dismissed as the scope of the report was being re-evaluated". On June 30, 2025, the government website hosting access to all past National Climate Assessment Reports was taken down.
The NCA is a major product of the U.S. Global Change Research Program (USGCRP) which coordinates a team of experts and receives input from a Federal Advisory Committee. NCA research is integrated and summarized in the mandatory ongoing National Climate Assessment Reports. The reports are "extensively reviewed by the public and experts, including federal agencies and a panel of the National Academy of Sciences. For the Third National Climate Assessment, released in 2014, USGCRP coordinated hundreds of experts and received advice from a sixty-member Federal Advisory Committee. The Fourth NCA (NCA4) was released in two volumes, in October 2017 and in November 2018.
The First National Climate Assessment was published in 2000. Between 2002 and 2009, USGCRP previously known as the U.S. Climate Change Science Program (CCSP), produced 21 Synthesis and Assessment Products (SAPs). The second NCA was published in 2009 and the third was released in 2014.
NCA's overarching goal according to their May 20, 2011 engagement strategy summary, "is to enhance the ability of the U.S. to anticipate, mitigate, and adapt to changes in the global environment (NCA 2011:2)."
The vision is to advance an inclusive, broad based, and sustained process for assessing and communicating scientific knowledge of the impacts, risks, and vulnerabilities associated with a changing global climate in support of decision-making across the U.S.
— NCA May 20, 2011 page2
According to the USGCRP official website the NCA,
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National Climate Assessment
File:NCA5 2023 FullReport.pdf The National Climate Assessment (NCA) is an initiative within the U.S. federal government focused on climate change science, formed under the auspices of the Global Change Research Act of 1990. The U.S. Global Change Research Program (USGCRP) which coordinates a team of experts and receives input from a Federal Advisory Committee. The first National Climate Assessment was published in 2000. Since four additional reports have been published, with the Fifth report published in 2023.
Work halted in 2025 on the 6th when funding was eliminated during the second Trump Administration. The scientists and experts who had been compiling the report were then dismissed as the scope of the report was being re-evaluated". On June 30, 2025, the government website hosting access to all past National Climate Assessment Reports was taken down.
The NCA is a major product of the U.S. Global Change Research Program (USGCRP) which coordinates a team of experts and receives input from a Federal Advisory Committee. NCA research is integrated and summarized in the mandatory ongoing National Climate Assessment Reports. The reports are "extensively reviewed by the public and experts, including federal agencies and a panel of the National Academy of Sciences. For the Third National Climate Assessment, released in 2014, USGCRP coordinated hundreds of experts and received advice from a sixty-member Federal Advisory Committee. The Fourth NCA (NCA4) was released in two volumes, in October 2017 and in November 2018.
The First National Climate Assessment was published in 2000. Between 2002 and 2009, USGCRP previously known as the U.S. Climate Change Science Program (CCSP), produced 21 Synthesis and Assessment Products (SAPs). The second NCA was published in 2009 and the third was released in 2014.
NCA's overarching goal according to their May 20, 2011 engagement strategy summary, "is to enhance the ability of the U.S. to anticipate, mitigate, and adapt to changes in the global environment (NCA 2011:2)."
The vision is to advance an inclusive, broad based, and sustained process for assessing and communicating scientific knowledge of the impacts, risks, and vulnerabilities associated with a changing global climate in support of decision-making across the U.S.
— NCA May 20, 2011 page2
According to the USGCRP official website the NCA,