Andrew Dessler

@andrewdessler.com

Prof of Atmospheric Sciences & climate scientist @ Texas A&M; AGU and AAAS Fellow; Native Texan; find out what I think at https://www.theclimatebrink.com/

In Texas, the State is removing climate change courses from the core curriculum. They have decided that climate change is just too dangerous to teach the students. This is indoctrination. I wrote an oped about it in the SA Express-News. Gift link: www.expressnews.com/opinion/comm...

Texas can’t hide from climate change by stopping students from learning about it

Texas has removed climate change courses from core curriculum at public universities. Ignoring climate change will not serve the state.

expressnews.com

faculty tweeps: How many students do you need to have before you feel OK not knowing all of their names. I feel OK not knowing students' names in a class of 100, but I would feel terrible for a class of 20.

Letting Hader throw so many pitches was a risk that didn't pay off. Hader obviously not available today and I wonder if he'll be available tomorrow. Unless the Astros or Rangers go 4-0, the winner of the AL West in 2026 will set a record for worst record to win a division.

Chandler Rome@chandlerrome.bsky.social · 6d ago

The Astros lost 6-5. They are 78-80. Joe Espada pushed the chips in with his $95 million closer on the mound. It did not work. Josh Hader threw 44 pitches — his most in a regular-season game since Aug. 9, 2019. Josh Naylor hit the final one for a walk-off single

NEW PAPER: In a new paper, jointly published in @agu.org Earth's Future & @ametsoc.org BAMS, and co-led by Melissa Kenney, @costasamaras.com and me, 175 authors outline priorities to guide the future of scientific assessments of climate change in the United States. 🧵

Research Priorities for Robust Climate Assessments in the United States

A network of climate assessments plays a critical role in synthesizing the state of science to support evidence-based decision-making To support future U.S. and sub-national climate assessments, ...

doi.org

Somehow – and I have no idea how this happened – I am the administrator for Texas A&M on huggingface.  Yes, I know, with great power comes great responsibility. 

Given the outrageous, dangerous, and outright false statements made about how the polio (and other) vaccine was a "fraud" (at the Children's Health Defense conference), here's a reminder of what a massive success it was. RFK Jr. & his minions must be stopped from destroying the US healthcare system.

Graph of the number of cases and deaths from polio from 1910 to 2022, showing how polio completely disappeared after the introduction of the vaccine -- one of the most important health advances of the 20th century. Data from the US Public Health Services; the Center for Disease Control.

I got a question from @afreedma.bsky.social about what the models show. Here's global average precipitable water for Aug. from CMIP6 models. PWAT increases more in the models than in the observations. The disagreement appears to be linked to a lack of increase in the observations prior to 2000.

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Andrew Dessler@andrewdessler.com · 2w ago

On The Climate Brink: The Atmosphere Just Set a Water Vapor Record. Aug. 2026 probably had more water vapor in the atmosphere than any month in the last few thousand years, if not a 100,000 years. www.theclimatebrink.com/p/the-atmosp...

"The amendment misconstrues the design and purpose of emissions scenarios; imposes an ad hoc evaluation standard that no emissions scenario ... can meet; [and] it would create confusion and errors into an assessment that already effectively and accurately communicates scenario dependence."

Christopher Callahan@ccallahan45.bsky.social · 2w ago

The White House plans to amend the National Climate Assessment to question RCP8.5. Last week, I, @jsmankin.bsky.social, and @vsrikrish.bsky.social commented that this proposal is "scientifically unsupported and procedurally deficient". You can see our comment here: essopenarchive.org/doi/full/10....

The Montreal Protocol was signed on this date in 1987. The greatest environmental treaty in history. With the current intense polar vortex, 25 years ago we would be observing one of the largest ozone holes on record. Today, a sizable ozone hole, and a sign of slow healing. ozonewatch.gsfc.nasa.gov

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“The atmosphere holds more water vapor than it used to because it is warmer than it used to be. August 2026 saw the highest water vapor levels in the modern record due to the extreme warmth from climate change and the El Niño.”

Andrew Dessler@andrewdessler.com · 2w ago

On The Climate Brink: The Atmosphere Just Set a Water Vapor Record. Aug. 2026 probably had more water vapor in the atmosphere than any month in the last few thousand years, if not a 100,000 years. www.theclimatebrink.com/p/the-atmosp...