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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.

Background

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.

General

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,

Informs the nation about already observed changes, the current status of the climate, and anticipated trends for the future; integrates scientific information from multiple sources and sectors to highlight key findings and significant gaps in our knowledge; establishes consistent methods for evaluating climate impacts in the U.S. in the context of broader global change, and provides input to Federal science priorities and is used by U.S. citizens, communities, and businesses as they create more sustainable and environmentally sound plans for the nation's future.

In 2013, the President's Climate Action Plan released by the Executive Office of the President specifically noted the importance of the National Climate Assessments in achieving the goal of "Using Sound Science to Manage Climate Impacts".

The next assessment is scheduled to be released is 2023. On August 18, 2017, a 15-member advisory committee that was tasked with writing "concrete guidance" based on the assessment was disbanded. NOAA said that the disbandment of the committee will not "impact the completion of the Fourth National Climate Assessment."

Global Change Research Act

The National Climate Assessment (NCA) is conducted under the auspices of the Global Change Research Act of 1990. The GCRA requires a report to the President and the Congress every four years that integrates, evaluates, and interprets the findings of the U.S. Global Change Research Program (USGCRP); 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 analyzes current trends in global change, both human-induced and natural, and projects major trends for the subsequent 25 to 100 years.

The Federal government is responsible for producing these reports through the U.S. Global Change Research Program (USGCRP), a collaboration of 13 Federal agencies and departments.

National Climate Assessment and Development Advisory Committee (NCADAC)

The National Climate Assessment and Development Advisory Committee (NCADAC) was a 60-person U.S. Federal Advisory Committee which oversaw the development of the draft Third NCA report and made recommendations about the ongoing assessment process. The committee was sun-set in fall 2014. The Department of Commerce established the NCADAC in December 2010 as per the Federal Advisory Committee Act (1972). 1972. The NCADAC was supported through the National Oceanic and Atmospheric Administration (NOAA).

The successor Advisory Committee for the Sustained National Climate Assessment, established in 2015, was sunsetted by the Trump administration on August 20, 2017. The fifteen-member committee was chaired by Richard H. Moss.

National Assessment Synthesis Team (NAST)

In 1998, the first National Assessment Synthesis Team (NAST) was formed under the auspices of the Subcommittee on Global Change Research (SGCR), through the Committee on Environmental and Natural Resources (CENR) and the National Science and Technology Council (NSTC) with members from "government, academia, and private enterprise." Its mandate was to broadly "design and conduct" "national efforts to assess the consequences of climate variability and climate change for the United States." NAST is an advisory committee chartered under the Federal Advisory Committee Act to help the US Global Change Research Program fulfill its legal mandate under the Global Change Research Act of 1990. The NSTC forwarded the report to the President and Congress for their consideration as required by the Global Change Research Act. Administrative support for the US Global Change Research Program was provided by the University Corporation for Atmospheric Research, which was sponsored by the National Science Foundation." In their 2001 assessment, the NAST concluded in the United States, "natural ecosystems appear to be the most vulnerable to the harmful effects of climate change." In their 2001 report they also described long-term major trends in climate change in the twenty-first century. The first NAST co-chairs were Dr. Jerry M. Melillo of the Marine Biological Laboratory in Woods Hole, Massachusetts, Tony Janetos, and Thomas Karl.

National Climate Assessment Reports

First National Climate Assessment (NCA1) 2000

The First National Climate Assessment prepared by National Assessment Synthesis Team (NAST), entitled "Climate Change Impacts on the United States: the Potential Consequences of Climate Variability and Change", was released in 2000. The report was a multidisciplinary effort to study and portray in regional detail the potential effects of human-induced global warming on the United States. The project was articulated into some 20 regional studies - each involving dozens of scientific and academic experts as well as representatives of industry and environmental groups.

Second National Climate Assessment (NCA2) 2009

The Second National Climate Assessment, entitled "Global Climate Change Impacts in the United States", was published in 2009. In addition to synthesizing, evaluating, and reporting on what was known about the potential consequences of climate change, the report also sought to identify potential measures to adapt to climate change and to identify the highest research priorities for the future.

Third National Climate Assessment (NCA3) 2014

The Third National Climate Assessment report entitled "Global Climate Change Impacts in the United States" was delivered to the Federal Government for review in 2013 and became available to the public in May 2014.

The Third NCA report was written by more than 300 authors drawn from academia; local, state, tribal, and Federal governments; and the private and nonprofit sectors. The NCADAC selected these authors based on criteria that included expertise, experience, and ensuring a variety of perspectives.

After review by the NCADAC, the draft Third NCA report was released for public review and comment on January 14, 2013. By the time the public comment period closed on April 12, 2013, more than 4000 comments had been received from 644 government, non-profit, and commercial sector employees, educators, students, and the general public.

Concurrently, the National Research Council, part of the National Academy of Sciences, reviewed the draft and submitted feedback. The NCADAC produced a final draft of their report and provided it to the federal government for review in late fall of 2013; a final public version of the report was released on May 6, 2014. A number of derivative products, including a printed "Highlights" document, have been produced in addition to the full interactive electronic NCA document that is available on the web.

In preparation for the 2014 NCA, the USGCRP began in 2011 to call for wider participation and reinforced the long-term goal of improving climate literacy. Recruitment began in 2011 for NCAnet, a network of organizations working with the NCA, to further engage producers and users of assessment information across the United States. NCAnet was officially established and registered at the Federal Register on April 13, 2012.

Fourth National Climate Assessment (NCA4) 2017/2018

In Fourth National Climate Assessment (NCA4) Volume 1, released in October 2017, entitled "Climate Science Special Report" (CSSR), researchers reported that "it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. For the warming over the last century, there is no convincing alternative explanation supported by the extent of the observational evidence." A 2018 CRS cited the October 2017 CSSR: "Detection and attribution studies, climate models, observations, paleoclimate data, and physical understanding lead to high confidence (extremely likely) that more than half of the observed global mean warming since 1951 was caused by humans, and high confidence that internal climate variability played only a minor role (and possibly even a negative contribution) in the observed warming since 1951. The key message and supporting text summarizes extensive evidence documented in the peer-reviewed detection and attribution literature, including in the IPCC Fifth Assessment Report." Volume 2 entitled "Impacts, Risks, and Adaptation in the United States" was released on November 23, 2018. According to Volume II, "Without substantial and sustained global mitigation and regional adaptation efforts, climate change is expected to cause growing losses to American infrastructure and property and impede the rate of economic growth over this century." The National Oceanic and Atmospheric Administration (NOAA) was "administrative lead agency" in the preparation of the Fourth National Climate Assessment. According to NOAA, "human health and safety" and American "quality of life" is "increasingly vulnerable to the impacts of climate change". The USGCRP team that produced the report included thirteen federal agencies— NOAA, the DOA, DOC, DOD, DOE, HHS, DOI, DOS, DOT, EPA, NASA, NSF, Smithsonian Institution, and the USAID—with the assistance of "1,000 people, including 300 leading scientists, roughly half from outside the government."

Fifth National Climate Assessment (NCA5) 2023

NCA5 was published on November 14, 2023.

Proposed Chapters (as of February 2022):

• Earth System
  • Earth System Processes
  • Climate Trends

• National Topics
  • Water
  • Energy
  • Land Cover and Land Use
  • Forests
  • Ecosystems and Biodiversity
  • Coastal Effects
  • Oceans and Marine Resources
  • Agriculture
  • Built Environment
  • Transportation
  • Air Quality
  • Human Health
  • Tribal and Indigenous Peoples
  • International
  • Complex Systems
  • Economics*
  • Human Social Systems*

• Regions (Northeast, Southeast, U.S. Caribbean, Midwest, ... Alaska, Hawaii and U.S.-Affiliated Pacific Islands)

• Response (Adaptation, Mitigation)

Global Change Information System

The U.S. Global Change Research Program (USGCRP) has established the Global Change Information System (GCIS) to better coordinate and integrate the use of federal information products on changes in the global environment and the implications of those changes for society. The GCIS is an open-source, web-based resource for traceable, sound global change data, information, and products. Designed for use by scientists, decision makers, and the public, the GCIS provides coordinated links to a select group of information products produced, maintained, and disseminated by government agencies and organizations. As well as guiding users to global change research products selected by the 13 member agencies, the GCIS serves as a key access point to assessments, reports, and tools produced by the USGCRP. The GCIS is managed, integrated, and curated by USGCRP.

See also

• National Research Council, report on climate change
• Presidential Climate Action Plan
• State of the Climate
• Climate security

Notes

1. The First National Climate Assessment Report was "prepared by the National Assessment Synthesis Team (NAST), an advisory committee chartered under the Federal Advisory Committee Act to help the US Global Change Research Program fulfill its mandate under the Global Change Research Act of 1990. The National Science and Technology Council forwarded the report to the President and Congress for their consideration as required by the Global Change Research Act. Administrative support for the US Global Change Research Program is provided by the University Corporation for Atmospheric Research, which is sponsored by the National Science Foundation (NCA 2000)."

References

1. ^ Preparing the Nation for Change: Introduction to the National Climate Assesement (PDF), Washington, D.C: U.S. Global Change Research Program, 2013, retrieved May 9, 2014
2. Global Change Research Act of 1990, Public Law 101-606(11/16/90) 104 Stat. 3096-3104, 1990, archived from the original on February 18, 2013
3. Hollings, Ernest F. (1990), Global Change Research Act of 1990, Bill Summary & Status 101st Congress (1989 - 1990) S.169
4. Staudt, A. C.; Cloyd, E. T.; Baglin, C. (July 31, 2012), "NCAnet: Building a Network of Networks to Support the National Climate Assessment", AGU Fall Meeting Abstracts, 2012, NCAnet: GC11C–1019, Bibcode:2012AGUFMGC11C1019S, retrieved May 9, 2014
5. ^ Climate Change Impacts on the United States: the Potential Consequences of Climate Variability and Change (PDF), The First National Climate Assessment, 2000, retrieved May 5, 2014
6. ^ Previous Assessments, Washington, D.C: U.S. Global Change Research Program, n.d., retrieved May 5, 2014
7. Our Changing Climate, Washington, D.C: U.S. Global Change Research Program, 2013, retrieved May 5, 2014
8. National Climate Assessment (NCA) Engagement Strategy (PDF), Washington, DC: USGCRP, May 20, 2011, p. 27, retrieved May 9, 2014
9. What We Do: Assess the U.S. Climate, Washington, DC: USGCRP, n.d., retrieved May 9, 2014
10. The President's Climate Action Plan (PDF), Washington, DC: Executive Office of the President, June 2013, retrieved May 9, 2014
11. "Fifth National Climate Assessment". GlobalChange.gov. Retrieved 2020-11-12.
12. Eilperin, Juliet (August 20, 2017). "The Trump administration just disbanded a federal advisory committee on climate change". Washington Post.
13. Global Change Act, Washington, DC: USCCRP, n.d., retrieved May 10, 2014
14. National Climate Assessment and Development Advisory Committee, Washington, DC: USCCRP, n.d., retrieved May 10, 2014
15. Eilperin, Juliet (August 20, 2017). "The Trump administration just disbanded a federal advisory committee on climate change". Washington Post. Retrieved 14 September 2017.
16. US National Assessment of the Potential Consequences of Climate Variability and Change Charge for the National Assessment Synthesis Team, Washington, DC: USCCRP, January 27, 1998, retrieved May 8, 2014
17. ^ Joyce, Linda, ed. (2008), Climate Change Assessments, Fort Collins, CO.: United States Forest Service/Climate Change Resource Center (CCRC), retrieved May 9, 2014
18. "GlobalChange.gov". GlobalChange.gov. Retrieved 12 April 2018.
19. "Appendix I - Biographical Sketches of NAST Members" (PDF), National Assessment, GCRIO, n.d., archived from the original (PDF) on December 4, 2010, retrieved May 9, 2014
20. Assessments, Washington, DC: USCCRP, n.d.
21. Global Climate Change Impacts in the United States, Washington, DC: USCCRP, 2009
22. Full Report, Washington, D.C: U.S. Global Change Research Program, 2013, retrieved May 5, 2014
23. Newsletter (PDF), Washington, DC: USCCRP, May 2013
24. Rice, Doyle (6 May 2014). "Federal report gauges U.S. impacts of global warming". USA Today. Retrieved 6 May 2014.
25. "National Climate Assessment and Development Advisory Committee - GlobalChange.gov". globalchange.gov. Retrieved 12 April 2018.
26. Colleen McCain Nelson; Alicia Mundy (5 May 2014). "Obama Intensifies Focus on Climate With New Assessment Report". Wall Street Journal. Retrieved 6 May 2014.
27. "Third National Climate Assessment". Retrieved 25 June 2014.
28. Staudt, A. C.; Cloyd, E. T.; Baglin, C. (n.d.), "NCAnet: Building a network of networks to support the National Climate Assessment", AGU Fall Meeting Abstracts, 2012, USGCRP: GC11C–1019, Bibcode:2012AGUFMGC11C1019S, retrieved May 9, 2014
29. National Oceanic and Atmospheric Administration (NOAA) (April 13, 2014), NCAnet: Building a Network of Networks in Support of the National Climate Assessment (NCA), Federal Register, retrieved May 9, 2014
30. ^ Wehner, M. F.; Arnold, J. R.; Knutson, T.; Kunkel, K. E.; LeGrande, A. N. (2017). Wuebbles, D. J.; Fahey, D. W.; Hibbard, K. A.; Dokken, D. J.; Stewart, B. C.; Maycock, T. K. (eds.). Droughts, Floods, and Wildfires (Report). Climate Science Special Report: Fourth National Climate Assessment. Vol. 1. Washington, DC: U.S. Global Change Research Program. pp. 231–256. doi:10.7930/J0CJ8BNN.
31. ^ Wuebbles, D. J.; Fahey, D. W.; Hibbard, K. A.; Dokken, D. J.; Stewart, B. C.; Maycock, T. K., eds. (October 2017). Climate Science Special Report (CSSR) (PDF) (Report). Fourth National Climate Assessment. Vol. 1. Washington, DC: U.S. Global Change Research Program. p. 470. doi:10.7930/J0J964J6.
32. ^ Leggett, Jane A. (February 1, 2018). Evolving Assessments of Human and Natural Contributions to Climate Change (PDF) (Report). Congressional Research Service (CRS). p. 22. Retrieved November 23, 2018. This CRS report provides context for the Administration's Climate Science Special Report (October 2017) by tracing the evolution of scientific understanding and confidence regarding the drivers of recent global climate change.
33. ^ Impacts, Risks, and Adaptation in the United States (Report). National Climate Assessment. Vol. 2. November 23, 2018. Retrieved November 24, 2018.
34. "Climate Science Special Report (CSSR) Executive Summary". National Oceanic and Atmospheric Administration (NOAA). 2017. Retrieved November 23, 2018.
35. "New federal climate assessment for U.S. released: Report highlights impacts, risks and adaptations to climate change". National Oceanic and Atmospheric Administration (NOAA). November 23, 2018. Retrieved November 23, 2018.
36. "US Government Agencies Participating in the USGCRP". Agencies. USGCRP. 20 October 2008. Retrieved November 23, 2018.
37. Christensen, Jen; Nedelman, Michael (November 23, 2018). "Climate change will shrink US economy and kill thousands, government report warns". CNN. Retrieved November 23, 2018.
38. Fifth National Climate Assessment, U.S. Global Change Research Program. (Overview, 47 pp) (Report in Brief, 144pp)
39. "About the Global Change Information System". globalchange.gov. Retrieved 12 April 2018.
40. Ma, X.; Fox, P.; Tilmes, C.; Jacobs, K.; Waple, A. (2014). "Capturing and presenting provenance of global change information". Nature Climate Change. 4 (6): 409–413. doi:10.1038/nclimate2141.

External links

• U.S. Global Change Research Program, Organizational website.
• 2018 NCA Report
• volume 1 and volume 2 data, figures, and tables broken out from the 4th National Climate Assessment

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