RealClimate: “The Arctic Council is not dead”

RealClimate: The 4th UArctic congress on the Faroe islands finished with the message that the Arctic Council is still alive. It has overcome recent setbacks with difficulties concerning two of its mem...

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RealClimate: Scenarios, schmenarios…

RealClimate: The fantasy version of the normal updating of scenarios for a new round of CMIP simulations doing the rounds is bad faith BS. As climate folk will know, the community is currently embarki...

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RealClimate: A reflection on reflection

RealClimate: Confirmation bias and a profound lack of curiosity mark the latest ABC (Anything But Carbon) contrapalooza in DC this week and a decade-old albedo error trips them up. I occasionally dip ...

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RealClimate: Spencer’s Shenanigans: Part II

RealClimate: We previously highlighted Roy Spencer's poor practices in comparing models with observations, but we've now dug down a little deeper, and it's not pretty. A few weeks ago, the email excha...

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RealClimate: Spencer’s Shenanigans: Part II

RealClimate: We previously highlighted Roy Spencer's poor practices in comparing models with observations, but we've now dug down a little deeper, and it's not pretty. A few weeks ago, the email excha...

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RealClimate: The Puzzling Pleistocene

RealClimate: The mystery of why the last million or so years of glacial variability are so different to what came before just got more mysterious... It's easy to understand why the ice ages have such ...

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RealClimate: How robust is our accelerometer?

RealClimate: A new analysis of historical temperatures suggests that things are getting warmer faster, but what does it mean for the future?

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RealClimate: EPA’s final* ruling on CO2

RealClimate: The EPA has announced its final* ruling on the CO2 Endangerment Finding. *not even close to final. Notably, they have completely abandoned any reliance on the DOE's CWG report. The EPA is...

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RealClimate: The Climate Science reference they don’t want Judges to read

RealClimate: 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 Eviden...

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RealClimate: Koonin’s Continuing Calumnies

RealClimate: At a public event debating the DOE CWG report, Steve Koonin embarrasses himself further. This week there was a bit of a peculiar event at the Civitas Institute at Texas A&M, with three of...

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RealClimate: 2025 Updates

RealClimate: 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 th...

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RealClimate: A peek behind the curtain…

RealClimate: 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. The new releases of non-governmental emails ...

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RealClimate: AI/ML climate magic?

RealClimate: 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 th...

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RealClimate: 1.5ºC and all that

RealClimate: The Paris Agreement temperature limits are a little ambiguous and knowing where we are is tricky. The desire to keep global temperature rises since the pre-industrial, ideally below 1.5ºC...

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RealClimate: Who should pay?

RealClimate: Climate risk scores on real estate listings are having an impact on prices and realtors are complaining. But who should pay for these losses? If you have been browsing Zillow or Redfin in...

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RealClimate: Time and Tide Gauges wait for no Voortman

RealClimate: Here we go again. An obscure, methodologically poor, paper published with little to no review makes a convenient point and gets elevated into supposedly 'blockbusting' science by the merc...

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RealClimate: Lil’ NAS Express

RealClimate: The fast-tracked update of the 2009 EPA Endangerment finding from the National Academies for Science, Engineering and Mathematics (NASEM), has now been released. Unsurprisingly, it has co...

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RealClimate: DOE CWG Report “Moot”?

RealClimate: Somewhat breaking news. A court filing (from 9/4) from DOE has noted that the Climate Working Group has been disbanded (as of 9/3). This was done to make the EDF/UCS lawsuit moot, but it ...

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RealClimate: Critique of Chapter 6 “Extreme Weather” in the DOE review

RealClimate: Guest commentary by Kerry Emanuel Executive Summary Chapter 6 of the draft DOE report examines whether global warming exacerbates extreme weather. It rightly notes that because events suc...

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RealClimate: Climate Scientists response to DOE report

RealClimate: As we've mentioned, Andrew Dessler and Robert Kopp have been coordinating a scientific peer review of the DOW 'CWG' Critique of Climate Science. It is now out. The comments are available ...

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RealClimate: Critiques of the ‘Critical Review’

RealClimate: The first somewhat comprehensive reviews of the DOE critical review are now coming online. First out of the gate is a nice interactive from CarbonBrief based on direct input from scientis...

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RealClimate: Are direct water vapor emissions endangering anyone?

RealClimate: 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...

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RealClimate: The Endangerment of the Endangerment Finding?

RealClimate: 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 res...

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RealClimate: Ocean circulation going South?

RealClimate: Some intriguing new measurements of salinity in the oceans around Antarctica have set off reams of sensationalist speculations. Maybe some context is helpful... What we've been seeing The...

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RealClimate: Melange à Trois

RealClimate: 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...

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RealClimate: Predicted Arctic sea ice trends over time

RealClimate: Over multiple generations of CMIP models Arctic sea ice trend predictions have gone from much too stable to about right. Why? The diagnostics highlighted in our model-observations compari...

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RealClimate: The most recent climate status

RealClimate: The Arctic Council’s Arctic Monitoring and assessment Programme (AMAP) recently released a Summary for PolicyMakers’ Arctic Climate Change Update 2024. It is one of several stock taking e...

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RealClimate: WMO: Update on 2023/4 Anomalies

RealClimate: The WMO released its (now) annual state of the climate report this week. As well as the (now) standard set of graphs related to increasing greenhouse gas concentrations, rising temperatur...

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RealClimate: Andean glaciers have shrunk more than ever before in the entire Holocene

RealClimate: Glaciers are important indicators of climate change. A recent study published in the leading journal Science shows that glaciers in the tropical Andes have now retreated further than at a...

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RealClimate: Climate change in Africa

RealClimate: [latexpage] While there have been some recent set-backs within science and climate research and disturbing news about NOAA, there is also continuing efforts on responding to climate chang...

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