Christopher Callahan
@ccallahan45.bsky.social
climate scientist, bicycle cavalry in the war on cars. iuclimateandsociety.com
Reposted by Christopher Callahan
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.
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.
Apply - Interfolio
{{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
apply.interfolio.com
November 24, 2025 at 9:50 PM
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.
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.
Reposted by Christopher Callahan
Reposted by Christopher Callahan
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...
www.nature.com/articles/s41...
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...
www.nature.com
November 23, 2025 at 9:10 AM
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...
www.nature.com/articles/s41...
Reposted by Christopher Callahan
Wrote about how climate change is bad www.theatlantic.com/science/2025...
Climate Realism Is a Delusion
By shooting for 3 degrees Celsius of warming, the world could slide toward a more cataclysmic 4 degrees.
www.theatlantic.com
November 23, 2025 at 5:47 PM
Wrote about how climate change is bad www.theatlantic.com/science/2025...
Reposted by Christopher Callahan
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
rdcu.be/ei0T5
November 21, 2025 at 2:32 PM
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
rdcu.be/ei0T5
Reposted by Christopher Callahan
Thank you @climateconnections.bsky.social for bringing this important paper by @ccallahan45.bsky.social & @jsmankin.bsky.social to my attention. Three cheers for their research and for the powerful lede to their abstract:
1/x
1/x
Carbon majors and the scientific case for climate liability - Nature
A transparent and reproducible scientific framework is introduced to formalize how trillions in economic losses are attributable to the extreme heat caused by emissions from fossil fuel companies, whi...
www.nature.com
November 21, 2025 at 6:04 PM
Thank you @climateconnections.bsky.social for bringing this important paper by @ccallahan45.bsky.social & @jsmankin.bsky.social to my attention. Three cheers for their research and for the powerful lede to their abstract:
1/x
1/x
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
rdcu.be/ei0T5
November 21, 2025 at 2:32 PM
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
rdcu.be/ei0T5
Reposted by Christopher Callahan
Analysis from @marshallburke.bsky.social and colleagues indicates that while mitigating further global warming can reduce heat mortality, mass mortality events remain plausible at near-future temperatures despite current adaptations to heat.
📄 READ HERE: ow.ly/CPRy50XtOnv
📄 READ HERE: ow.ly/CPRy50XtOnv
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...
ow.ly
November 20, 2025 at 5:49 PM
Analysis from @marshallburke.bsky.social and colleagues indicates that while mitigating further global warming can reduce heat mortality, mass mortality events remain plausible at near-future temperatures despite current adaptations to heat.
📄 READ HERE: ow.ly/CPRy50XtOnv
📄 READ HERE: ow.ly/CPRy50XtOnv
Reposted by Christopher Callahan
In a rapidly warming world, heat waves will become mass mortality events. If 2003 European heat wave were to recur with 1.5 °C of warming (we're close to that today), this study predicts 17,800 excess deaths across Europe in *one week.* With 3 C of warming, the toll rises to 32,000.
📈🚨NEW: Extreme heat events are increasingly threatening to become mass mortality events. In @natclimate.nature.com today, we project tens of thousands of deaths in a single week across Europe if extreme heat domes coincide with rising global temperatures.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
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...
www.nature.com
November 18, 2025 at 2:19 PM
In a rapidly warming world, heat waves will become mass mortality events. If 2003 European heat wave were to recur with 1.5 °C of warming (we're close to that today), this study predicts 17,800 excess deaths across Europe in *one week.* With 3 C of warming, the toll rises to 32,000.
Reposted by Christopher Callahan
Few things bug me more than higher ed leaders saying that we lost our mission and lost the trust of the public, when we have actually been the target of a decades-long smear campaign by the right wing that worked. The moment we’re losing our mission is right now, in capitulation.
November 19, 2025 at 1:03 PM
Few things bug me more than higher ed leaders saying that we lost our mission and lost the trust of the public, when we have actually been the target of a decades-long smear campaign by the right wing that worked. The moment we’re losing our mission is right now, in capitulation.
Reposted by Christopher Callahan
📈🚨NEW: Extreme heat events are increasingly threatening to become mass mortality events. In @natclimate.nature.com today, we project tens of thousands of deaths in a single week across Europe if extreme heat domes coincide with rising global temperatures.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
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...
www.nature.com
November 18, 2025 at 1:06 PM
📈🚨NEW: Extreme heat events are increasingly threatening to become mass mortality events. In @natclimate.nature.com today, we project tens of thousands of deaths in a single week across Europe if extreme heat domes coincide with rising global temperatures.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
📈🚨NEW: Extreme heat events are increasingly threatening to become mass mortality events. In @natclimate.nature.com today, we project tens of thousands of deaths in a single week across Europe if extreme heat domes coincide with rising global temperatures.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
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...
www.nature.com
November 18, 2025 at 1:06 PM
📈🚨NEW: Extreme heat events are increasingly threatening to become mass mortality events. In @natclimate.nature.com today, we project tens of thousands of deaths in a single week across Europe if extreme heat domes coincide with rising global temperatures.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Christopher Callahan
Mary Shelley: I subtitled my book The Modern Prometheus as a cautionary tale
Tech company: At long last,
Tech company: At long last,
Jeff Bezos will be co-CEO of AI startup Project Prometheus
Jeff Bezos will be co-CEO of AI startup Project Prometheus
Jeff Bezos has a new job.
buff.ly
November 17, 2025 at 1:50 PM
Mary Shelley: I subtitled my book The Modern Prometheus as a cautionary tale
Tech company: At long last,
Tech company: At long last,
"What I do know is that I was accused more than once by some Board members and the Governor’s office of being stubborn. Perhaps I am. But stubborn and principled often look the same, especially to those who are unprincipled."
Former UVA president Jim Ryan, who resigned over the summer due to pressure from the Trump Administration, just shared this 12-page letter with the Faculty Senate, detailing his experience with the Board of Visitors and DOJ.
It's a surreal--and troubling--read.
drive.google.com/file/d/1Is6x...
It's a surreal--and troubling--read.
drive.google.com/file/d/1Is6x...
November 14, 2025 at 3:11 PM
"What I do know is that I was accused more than once by some Board members and the Governor’s office of being stubborn. Perhaps I am. But stubborn and principled often look the same, especially to those who are unprincipled."
Reposted by Christopher Callahan
MAGA’s ongoing war on academic freedom, reflected in headlines from the last 24 hours.
November 14, 2025 at 1:17 PM
MAGA’s ongoing war on academic freedom, reflected in headlines from the last 24 hours.
Reposted by Christopher Callahan
I've been on the road so I'm behind the times—but if you wanted to destroy US science, I can think of no more expedient action.
Blatant unconstitutionality aside, fuck this backwards forwards and sideways.
www.science.org/content/article/u-s-congress-considers-sweeping-ban-chinese-collaborations
Blatant unconstitutionality aside, fuck this backwards forwards and sideways.
www.science.org/content/article/u-s-congress-considers-sweeping-ban-chinese-collaborations
November 14, 2025 at 3:03 AM
I've been on the road so I'm behind the times—but if you wanted to destroy US science, I can think of no more expedient action.
Blatant unconstitutionality aside, fuck this backwards forwards and sideways.
www.science.org/content/article/u-s-congress-considers-sweeping-ban-chinese-collaborations
Blatant unconstitutionality aside, fuck this backwards forwards and sideways.
www.science.org/content/article/u-s-congress-considers-sweeping-ban-chinese-collaborations
Reposted by Christopher Callahan
Time is up for 1.5°C. The remaining carbon budget for 1.5°C is virtually exhausted: 170 GtCO2, equivalent to 4 years at the 2025 emissions levels.
November 13, 2025 at 6:37 PM
Time is up for 1.5°C. The remaining carbon budget for 1.5°C is virtually exhausted: 170 GtCO2, equivalent to 4 years at the 2025 emissions levels.
Reposted by Christopher Callahan
As of this morning, Starbucks workers across the country are officially ON STRIKE. And we're prepared for this to become the biggest and longest ULP strike in Starbucks history.
Say #NoContractNoCoffee with us: DON'T BUY STARBUCKS for the duration of our open-ended ULP strike! $SBUX
Say #NoContractNoCoffee with us: DON'T BUY STARBUCKS for the duration of our open-ended ULP strike! $SBUX
November 13, 2025 at 11:33 AM
As of this morning, Starbucks workers across the country are officially ON STRIKE. And we're prepared for this to become the biggest and longest ULP strike in Starbucks history.
Say #NoContractNoCoffee with us: DON'T BUY STARBUCKS for the duration of our open-ended ULP strike! $SBUX
Say #NoContractNoCoffee with us: DON'T BUY STARBUCKS for the duration of our open-ended ULP strike! $SBUX
Reposted by Christopher Callahan
I wish it were better understood that this is an act of mass murder akin to firing into a large crowd. Impossible to say specifically who will die as a result of this action, but certainty that it will be many.
The Trump admin seems set to force two Colorado coal plants to stay open past their planned closure this year, even as the costs of keeping an aging, unnecessary Michigan coal plant running through the summer top $80M. Are more must-run orders coming?
www.canarymedia.com/articles/fos...
#energysky
www.canarymedia.com/articles/fos...
#energysky
Trump’s DOE may soon force more coal plants to stay open
Colorado coal plants are likely to face DOE orders to keep running past planned closure dates, even as the costs of keeping an old Michigan plant open…
www.canarymedia.com
November 12, 2025 at 2:31 PM
I wish it were better understood that this is an act of mass murder akin to firing into a large crowd. Impossible to say specifically who will die as a result of this action, but certainty that it will be many.
Reposted by Christopher Callahan
This person was the President of Harvard University, the US Secretary of the Treasury, and the Director of the National Economic Council of the United States.
November 12, 2025 at 5:37 PM
This person was the President of Harvard University, the US Secretary of the Treasury, and the Director of the National Economic Council of the United States.
Reposted by Christopher Callahan
Chuck Schumer Helps Pull Democrats Back From Brink Of Courage
November 10, 2025 at 5:02 AM
Chuck Schumer Helps Pull Democrats Back From Brink Of Courage
Reposted by Christopher Callahan
The hardening Beltway conventional wisdom about the tolerability of 3°C of warming (leaving aside the possibility of carbon cycle feedbacks kicking that up to around 4°C) is crazy. thebulletin.org/2022/07/extr...
November 9, 2025 at 6:06 PM
The hardening Beltway conventional wisdom about the tolerability of 3°C of warming (leaving aside the possibility of carbon cycle feedbacks kicking that up to around 4°C) is crazy. thebulletin.org/2022/07/extr...
Reposted by Christopher Callahan
what star wars really need is a HUNT FOR RED OCTOBER style submarine thriller
November 8, 2025 at 6:48 PM
what star wars really need is a HUNT FOR RED OCTOBER style submarine thriller
Reposted by Christopher Callahan
Latest write-up about outrageous administrative over reach at IU. www.jta.org/2025/11/07/u...
In Indiana, a vaunted Jewish studies program is upended by red-state politics over Israel and speech - Jewish Telegraphic Agency
A leadership shakeup, a defunded graduate student and political pressure from above have turned a storied program into a flashpoint for Trump-era campus politics.
www.jta.org
November 8, 2025 at 3:20 AM
Latest write-up about outrageous administrative over reach at IU. www.jta.org/2025/11/07/u...