This month’s open thread on climate topics. Please be respectful and substantive.
Unforced Variations: May 2026
This month’s open thread on climate topics. El Niño coming (shades of 2023), competitive predictions, ill-advised geo-engineering ideas, and massive shifts in renewable energy roll out. Surely something there to discuss…
Unforced Variations: Apr 2026
How robust is our accelerometer?
Guest commentary from Nathan Lenssen (Colorado School of Mines)
A new analysis of historical temperatures suggests that things are getting warmer faster, but what does it mean for the future?
[Read more…] about How robust is our accelerometer?Unforced Variations: Mar 2026
EPA’s final* ruling on CO2
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 CO2The 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 readUnforced 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…