In the EPA EF reconsideration document there is a section on p62 where they attempt to make the argument that the CO2 endangerment finding would also apply to direct water vapor emissions to the atmosphere, which is (according to them) obviously absurd. But both claims are bogus. … Read Full Article about Are direct water vapor emissions endangering anyone?
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The Endangerment of the Endangerment Finding?
The EPA, along with the "Climate Working Group" (CWG) of usual suspects (plus Judith Curry and Ross McKitrick) at DOE, have just put out a document for public comment their attempt to rescind the 2009 Endangerment Finding for greenhouse gas emissions. … Read Full Article about The Endangerment of the Endangerment Finding?
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Unforced Variations: Aug 2025
This month's open thread. Please try and stay focused on substance rather than personalities. There are many real issues that are particularly salient this month, and so maybe we can collectively try not to have the comments descend into tedium. Note: Moderation will be applied to over-frequent … Read Full Article about Unforced Variations: Aug 2025
National Climate Assessment links
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, … Read Full Article about National Climate Assessment links
Ocean circulation going South?
Some intriguing new measurements of salinity in the oceans around Antarctica have set off reams of sensationalist speculations. Maybe some context is helpful... … Read Full Article about Ocean circulation going South?
Melange à Trois
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 … Read Full Article about Melange à Trois
Unforced variations: July 2025
This month's open thread. Try to stick to climate topics. … Read Full Article about Unforced variations: July 2025
Unforced variations: Jun 2025
This month's open thread. Please stay on climate topics and try to be constructive. … Read Full Article about Unforced variations: Jun 2025
Predicted Arctic sea ice trends over time
Over multiple generations of CMIP models Arctic sea ice trend predictions have gone from much too stable to about right. Why? … Read Full Article about Predicted Arctic sea ice trends over time
The most recent climate status
The Arctic Council’s Arctic Monitoring and assessment Programme (AMAP) recently released a Summary for PolicyMakers’ Arctic Climate Change Update 2024. … Read Full Article about The most recent climate status
Unforced variations: May 2025
This month's open thread. Note that the Nenana Ice challenge break up date graph has been updated, and the Yukon river ice break up is imminent (or may have already happened! [Update - it already had]). Please stay focused on climate issues. … Read Full Article about Unforced variations: May 2025
Unforced Variations: Apr 2025
This month's open thread for climate topics. Please try to stay focused on climate instead of generic (and tedious) political sniping. … Read Full Article about Unforced Variations: Apr 2025