The EPA has announced its final* ruling on the CO2 Endangerment Finding. *not even close to final. … Read Full Article about EPA’s final* ruling on CO2
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The Climate Science reference they don’t want Judges to read
For the first time, the Federal Judicial Center (FJC) commissioned a chapter on climate science for the manual they put out (with the NASEM) for judges, the Reference on Scientific Evidence (4th Edition). This week, a month after it was published, they pulled the chapter out after being pressured by 27 Republican Attorneys General. You can nonetheless read it here. … Read Full Article about The Climate Science reference they don’t want Judges to read
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Koonin’s Continuing Calumnies
At a public event debating the DOE CWG report, Steve Koonin embarrasses himself further. … Read Full Article about Koonin’s Continuing Calumnies
Unforced variations: Feb 2026
This month's open thread about climate topics. Try to be substantive and respectful to other commenters. Note: Comments that are abusive and/or repetitive to the point of tedium will be moderated. If you've made the same point ten times already in the thread, and people are still arguing with … Read Full Article about Unforced variations: Feb 2026
2025 Updates
Our various graphics and model-observation comparisons have been updated with 2025 data. There are a few version updates that make some difference (particularly in sea ice extent), but the basic story is similar to last year. Feel free to comment and/or suggest changes for the future, including … Read Full Article about 2025 Updates
A peek behind the curtain…
New email releases from the EDF/UCS lawsuit against the DOE provide a rarely-seen behind the curtain look at how the climate contrarians work. … Read Full Article about A peek behind the curtain…
AI/ML climate magic?
There has been a frenzy around artificial intelligence and deep machine learning (AI/ML) since the “ChatGPT Moment” in 2022, and AI/ML is for sure going to affect us all. It strikes me that this buzz also looks more like a science fiction story (utopy/dystopy) than the old-fashion Clondyke goldrush … Read Full Article about AI/ML climate magic?
Unforced variations: Jan 2026
This month's open thread. We're not great ones for New Year's resolutions, but let's try. How about we resolve to stay substantive, refrain from abusing one another, and maintaining a generosity of spirit when interacting with others? Lots of things get updated in January and we'll try and keep … Read Full Article about Unforced variations: Jan 2026
1.5ºC and all that
The Paris Agreement temperature limits are a little ambiguous and knowing where we are is tricky. … Read Full Article about 1.5ºC and all that
Unforced Variations: Dec 2025
This month's open thread on climate topics as 2025 wraps up. Please be courteous to each other. Tis the season! … Read Full Article about Unforced Variations: Dec 2025
Who should pay?
Climate risk scores on real estate listings are having an impact on prices and realtors are complaining. But who should pay for these losses? … Read Full Article about Who should pay?
Site updates etc.
Hi folks, just a quick maintenance notice to say that we are upgrading the blog to a more recent version of PHP (which is the code that underlies Wordpress) (going from version 7.4 to 8.3). Unfortunately, this has caused problems for two of the older plugins we use, Kcite (which provides the inline … Read Full Article about Site updates etc.