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Archives for July 2025

National Climate Assessment links

21 Jul 2025 by group 4 Comments

For some reason, it has become hard to locate the various National Climate Assessments (NCAs) that have been produced by the USGCRP over the decades (and it’s pretty hard to find the USGRCP as well…). However, the reports are still accessible if you know where to look. So for future reference, here are all the links (and we’ve downloaded the pdfs locally so that they will always be available here).

NCA1 (2000)

  • Full report (via the internet archive) (via gov archive) (local pdf)

NCA2 (2009)

  • Full report (via the internet archive) (via gov archive) (local pdf)

NCA3 (2014)

  • Full Report (via the NOAA library) (local pdf)
  • Climate Science Supplement (via the internet archive) (local pdf)

NCA4 (2017)

  • Volume 1 Climate Science Special Report (via the NOAA library) (local pdf)
  • Volume 2 Impacts, Risks, and Adaptation in the United States (via the NOAA Library) (local pdf)

NCA5 (2023)

  • The NCA5 Atlas (via ESRI)
  • Full report (via the NOAA Library) (local pdf)

NCA6

There is no ongoing NCA6 process, even though it is mandated by Congress to be completed over the next few years. We’ll let you know if that changes.

Filed Under: Climate impacts, Climate Science, climate services, In the News Tagged With: National Climate Assessment, NCA, USGCRP

Ocean circulation going South?

13 Jul 2025 by Gavin 42 Comments

Some intriguing new measurements of salinity in the oceans around Antarctica have set off reams of sensationalist speculations. Maybe some context is helpful…

[Read more…] about Ocean circulation going South?

Filed Under: Arctic and Antarctic, Climate modelling, Climate Science, Featured Story, hydrological cycle, Instrumental Record, Oceans Tagged With: salinity, sea ice, Southern Ocean

Melange à Trois

8 Jul 2025 by Gavin 72 Comments

In honor of the revelation today, that Koonin, Christy and Spencer have been made Special Government Employees at the Dept. of Energy, we present a quick round up of our commentary on the caliber of their arguments we’ve posted here over the last decade or so.

TL;DR? The arguments are not very good.

[Read more…] about Melange à Trois

Filed Under: Climate Science, Featured Story, In the News, Instrumental Record, Model-Obs Comparisons, Scientific practice Tagged With: John Christy, MSU, Roy Spencer, Steve Koonin

Unforced variations: July 2025

1 Jul 2025 by group 592 Comments

This month’s open thread. Try to stick to climate topics.

Filed Under: Climate Science, Open thread, Solutions

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  • National Climate Assessment links
  • Ocean circulation going South?
  • Melange à Trois
  • Unforced variations: July 2025
  • Unforced variations: Jun 2025
  • Predicted Arctic sea ice trends over time

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This list of books since 2005 (in reverse chronological order) that we have been involved in, accompanied by the publisher’s official description, and some comments of independent reviewers of the work.
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