Christopher Callahan
@ccallahan45.bsky.social
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climate scientist, bicycle cavalry in the war on cars. iuclimateandsociety.com
reposted by
Christopher Callahan
rax ‘levon honkers’ king
about 24 hours ago
another morning when it’s an existentially shameful thing to be an american huh
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Acyn
3 days ago
Mamdani: For too long, those fluent in the good grammar of civility have deployed decorum to mask agendas of cruelty
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Seva
4 days ago
this new years eve I'm reminded of an old Soviet toast: Here's to another average year - worse than the one before it, but better than the one ahead
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Michael Li (李之樸)
4 days ago
The final Calvin and Hobbes, which appeared in papers 30 years ago today.
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lauren
7 days ago
whatever 2026 holds i don't think anything next year will be funnier than Chicago Pope. 2025 was overall a huge stinker but Chicago Pope was an all time great B-plot
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Best books I read in 2025: - Priestdaddy - Young Men and Fire - Atmosphere - Sword at Sunset
9 days ago
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Christopher Callahan
🚨☀️ICYMI: Our paper, now out in PNAS, revisited the 2003 heat wave in France, showing a much larger role for climate change than previously understood: 6,000 deaths in one month directly caused by fossil fuels.
www.pnas.org/doi/10.1073/...
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Quantifying the contributions of climate change and adaptation to mortality from unprecedented extreme heat events | PNAS
Understanding the mortality effects of the most extreme heat events is central to climate change risk analysis and adaptation decision-making. Accu...
https://www.pnas.org/doi/10.1073/pnas.2503577122
15 days ago
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Casey Ivanovich
13 days ago
Our paper exploring the drivers of the November 2023 “Taylor Swift” heatwave in Rio de Janeiro is officially out in WCD! Take a read to learn more about the causes of this record-breaking heatwave and Rio’s emerging risk for extreme heat:
wcd.copernicus.org/articles/6/1...
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Physical drivers of the November 2023 heatwave in Rio de Janeiro
Abstract. Because extreme heat has not historically been a major hazard for the city of Rio de Janeiro, the November 2023 Heatwave magnitude and timing were staggering. Here we conduct a case study of...
https://wcd.copernicus.org/articles/6/1857/2025/
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🚨☀️ICYMI: Our paper, now out in PNAS, revisited the 2003 heat wave in France, showing a much larger role for climate change than previously understood: 6,000 deaths in one month directly caused by fossil fuels.
www.pnas.org/doi/10.1073/...
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Quantifying the contributions of climate change and adaptation to mortality from unprecedented extreme heat events | PNAS
Understanding the mortality effects of the most extreme heat events is central to climate change risk analysis and adaptation decision-making. Accu...
https://www.pnas.org/doi/10.1073/pnas.2503577122
15 days ago
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jamelle
16 days ago
rfk will not rest until your kid is dead
wapo.st/4s2l2zn
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U.S. plans to stop recommending most childhood vaccines, defer to doctors
The plan, which is not finalized, suggests children get fewer shots and shifts to a model telling parents to consult doctors to make their own vaccine choices.
https://wapo.st/4s2l2zn
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Bob Kopp
18 days ago
AGU has a Congressional email and call script up on NCAR:
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Save NCAR from being dismantled today!
The Trump Administration has vowed to dissolve the center that provides critical extreme weather and climate data for our nation.
https://agu.quorum.us/campaign/151565/
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Michael E. Mann
18 days ago
Seen at
#AGU2025
in New Orleans
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David John Gagne II
18 days ago
Based on what I have been hearing about the NCAR situation, no one knew anything until the USA Today article came out. That means there isn’t much actual organization inside the administration to pull this off and a chance to fight back. Call your congresspeople today! Especially republicans.
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🚨☀️🔥 NEW: In August 2003, Europe was struck by a catastrophic heat wave. What can we learn from this event today? Using new machine learning and econometric tools, we show in PNAS that climate change contributed to 6,000 out of 15,000 deaths in France… (1/2)
www.pnas.org/doi/10.1073/...
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PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
https://www.pnas.org/doi/10.1073/pnas.2503577122
19 days ago
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Peter Brannen
18 days ago
An absolute bedrock institution for understanding how the planet works, just civilization-scaled vandalism by the most incurious morons on Earth
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Bob Kopp
18 days ago
Time to repurpose
#AGU25
as a mass mobilization in support of NCAR, NSF, NOAA, NASA, USGS, DOE BER, and the Congressional power of the purse.
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Colin Carlson says no war
18 days ago
AGU gonna be Stonewall 2 tomorrow
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Andrew Wilson
19 days ago
For those who want a figure! "... before 2003, sequencing a hot day after another hot day can nearly double the mortality effect of that hot day ... the compounding model yields an [Aug. 2003] death toll that is closer to the total ... than the standard model ..."
add a skeleton here at some point
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🚨☀️🔥 NEW: In August 2003, Europe was struck by a catastrophic heat wave. What can we learn from this event today? Using new machine learning and econometric tools, we show in PNAS that climate change contributed to 6,000 out of 15,000 deaths in France… (1/2)
www.pnas.org/doi/10.1073/...
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PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
https://www.pnas.org/doi/10.1073/pnas.2503577122
19 days ago
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Nobody Can Stop Popehat
22 days ago
The thing you need to understand about the Right is that they are absolutely fine just plain burning down higher education if taking it over ideologically doesn’t work. They’re perfectly happy reducing it to ashes.
add a skeleton here at some point
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Olúfẹ́mi O. Táíwò
24 days ago
these guys don't have the juice. they're gonna lose. believe your eyes
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Christopher Callahan
ak
24 days ago
which is why every time you socialize instead of giving in to scrolling alone on your couch you are helping defeat the republican project of making everyone as lonely and afraid of everything as they are. defeat fascism, have a coffee date with a friend
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George Pearkes
25 days ago
*US SEIZES OIL TANKER OFF THE COAST OF VENEZUELA
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Casey Ivanovich
25 days ago
Excited to be giving two invited presentations on the influence of monsoon systems on extreme (humid) heat at this year's
#AGU25
! Stop by NH44B-02 Thursday afternoon and A51H-01 Friday morning to learn more and chat!
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Christopher Callahan
Zito
26 days ago
Will Arnett was on Conan and told a story about how Conan dealt with the death of his parents by accusing Jason Bateman of killing them. It’s so funny.
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Next week at
#AGU25
. GC14C-06, Monday at 5:10.
26 days ago
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Christopher Callahan
Timothy Vollmer
27 days ago
Shameful response by UC Berkeley administration.
www.dailycal.org/news/campus/...
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UC Berkeley suspends lecturer Peyrin Kao for pro-Palestinian speech
UC Berkeley administration has suspended lecturer Peyrin Kao for the spring 2026 semester without pay for pro-Palestinian speech.
https://www.dailycal.org/news/campus/uc-berkeley-suspends-lecturer-peyrin-kao-for-pro-palestinian-speech/article_43394209-c40b-486f-b6fc-67478722d316.html
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Colin Carlson says no war
28 days ago
🎉🧪 Some rare GOOD news (🙃): the National Defense Authorization Act language that's just been released seems to have eliminated the "SAFE Research Act," which would have barred any scientist from federal funding if they had Chinese collaborations in the last 5 years
rules.house.gov/sites/evo-su...
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https://rules.house.gov/sites/evo-subsites/rules.house.gov/files/documents/rcp_xml-2.pdf
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alex williams
29 days ago
in conclusion: business hates university because businesses are failures and the library will endure forever
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Bob Kopp
29 days ago
Another thing
@agu.org
could do is highly visible trainings for attendees on civil liberties and immigrant rights by groups like
@aclu.org
and
@aila.org
(whose resources they are already sharing), and promoting the work of their litigation partners like
@democracyforward.org
and
@aaup.org
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add a skeleton here at some point
30 days ago
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Hey
@agu.org
what's your plan for this? The statement on the meeting website is... vague
www.nytimes.com/live/2025/12...
about 1 month ago
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Jake Grumbach
about 1 month ago
After becoming a congressional leader, a politician’s stock portfolio beats out those of peers by 47 (!!!) percentage points a year through trades timed around bills and firms that later get government contracts
www.nber.org/papers/w34524
via
@florianederer.bsky.social
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David_j_roth
about 1 month ago
I wrote about the dirty, demeaning, absolutely booming business of turning something like a shitty bigoted college essay into a shitty public career as a bigot, and also estimated how old Marine Todd would be today.
defector.com/the-conserva...
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The Conservative Grievance Business Is Always Hiring | Defector
Given his age when he first came to the world’s attention and assuming continued good health in the intervening decade and change, Marine Todd would be in his late 30s today. That would be if he was a...
https://defector.com/the-conservative-grievance-business-is-always-hiring
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AEA Information
about 1 month ago
The AEA has imposed a lifetime ban on Lawrence H. Summers’ membership and participation in AEA activities. See the full statement here.
www.aeaweb.org/news/aea-sta...
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Statement from the American Economic Association
https://www.aeaweb.org/news/aea-statement-dec-2-2025
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Christopher Callahan
Madison Condon
about 1 month ago
External to what?
add a skeleton here at some point
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Nature Portfolio
about 1 month ago
A study in Nature Climate Change quantifies the potential for extreme heat events in Europe to generate mass mortality and projects tens of thousands of excess deaths.
go.nature.com/483zJc3
🧪
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Sherry Affogato
over 2 years ago
Jared Harris, who I fully acknowledge is one of the best character actors ever, doing a weird voice: Boo! Get off my screen Lady who plays camina drummer doing a weird voice: I Would Brave Machine Gun Fire to Show Her a Single Spreadsheet
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Hypervisible
about 1 month ago
“While Shelby County has recorded the dirtiest air in Tennessee for many years — half the state’s admissions for childhood asthma come from there — local residents say the arrival of Colossus has made things worse.”
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In Memphis, where people fear Elon Musk’s supercomputer is making them ill
Colossus, an xAI supercomputer, is blamed for worsening air pollution in a historic black community
https://www.thetimes.com/us/news-today/article/grok-elon-musk-ai-memphis-super-computers-ppv9vpk8s
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Matthew Eadie
about 1 month ago
And one more other thing I’m seeing now, that Northwestern unsurprisingly didn’t mention in its statement, effectively banning gender affirming care at NU school of medicine
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Chris Geidner
about 1 month ago
The legal, media, and academic institutions capitulating to an authoritarian ordering payments for favorable treatment are damning themselves to irrelevance. They are destroying their institutions. They will be — and should be — shunned for failing in their most basic purposes for existing.
add a skeleton here at some point
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ryan cooper
about 1 month ago
sunshine: comes from heaven, bright, warm, gives life too all oil: a disgusting and poisonous black ichor that has to be sucked from the bowels of the earth, literally made of death
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Christopher Callahan
David Ho
about 1 month ago
The Trump regime wants to make us less healthy and more dead.
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Trump EPA moves to abandon rule that sets tough standards for deadly soot pollution
The Trump administration is seeking to abandon a rule that sets tough standards for deadly soot pollution, arguing that the Biden administration did not have authority to set the tighter standard on p...
https://www.independent.co.uk/news/donald-trump-environmental-protection-agency-biden-lee-zeldin-washington-b2872444.html?utm_term=Autofeed&utm_medium=Social&utm_source=Bluesky#Echobox=1764101484
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Jesse Eisinger
about 1 month ago
The Republicans are standing up to the power of Big Emergency Brake
www.wsj.com/business/aut...
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Justin S. Mankin
about 1 month ago
Dartmouth is hiring climate science postdocs through the prestigious Provost's Fellowship! Info:
apply.interfolio.com/178090
Applications are due February 15, 2026. Come join our collaborative and supportive climate community! Reach out to me (
[email protected]
) with questions.
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Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
http://apply.interfolio.com/178090
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Christopher Callahan
Kenny Logins
2 months ago
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Prof. Anders Levermann, PhD
about 1 month ago
This is a remarkable paper on the climate-induced heatwave death in Europe and how they will increase in a warming world.
www.nature.com/articles/s41...
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Increasing risk of mass human heat mortality if historical weather patterns recur - Nature Climate Change
The authors couple calculations of historical heatwave intensity at present and future global temperatures with exposure–response functions to quantify mortality from extreme heat events in Europe. Th...
https://www.nature.com/articles/s41558-025-02480-1
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Christopher Callahan
Peter Brannen
about 1 month ago
Wrote about how climate change is bad
www.theatlantic.com/science/2025...
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Climate Realism Is a Delusion
By shooting for 3 degrees Celsius of warming, the world could slide toward a more cataclysmic 4 degrees.
https://www.theatlantic.com/science/2025/11/cop-climate-3c-warming/685036/
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As international climate negotiations avoid direct confrontation with carbon power once again, a reminder that major fossil fuel companies can be traced to trillions of dollars in damages from extreme heat globally.
rdcu.be/ei0T5
add a skeleton here at some point
about 1 month ago
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