The EPA has announced its final* ruling on the CO2 Endangerment Finding.
*not even close to final.
[Read more…] about EPA’s final* ruling on CO2Blog – realclimate.org – All Posts
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 more…] about The Climate Science reference they don’t want Judges to readKoonin’s Continuing Calumnies
At a public event debating the DOE CWG report, Steve Koonin embarrasses himself further.
[Read more…] about Koonin’s Continuing CalumniesUnforced 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 you, repeating it another ten times isn’t going to help.
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 potential new comparisons.
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 more…] 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 craze.
[Read more…] 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 up, though possibly with less fanfare than in previous years. In other news, we await the (supposedly imminent) release of a new “National Climate Assessment”, and the (supposedly imminent) engagement of the authors of the DOE ‘climate report’ with the extensive critiques they received. Meanwhile CMIP7 has started, and we expect results to trickle into the databases throughout the year – dig into some of the literature to get a sense of what will change (better models, improved forcings, etc.).
Eppure si riscaldi.
1.5ºC and all that
The Paris Agreement temperature limits are a little ambiguous and knowing where we are is tricky.
[Read more…] about 1.5ºC and all that