Christopher Callahan's Avatar

Christopher Callahan

@ccallahan45

climate scientist: extreme heat, health, attribution, climate in the courts. iuclimateandsociety.com

2,687
Followers
316
Following
279
Posts
27.04.2023
Joined
Posts Following

Latest posts by Christopher Callahan @ccallahan45

And yet

09.03.2026 02:02 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

They should invent a way out that isn't through

07.03.2026 14:34 πŸ‘ 1481 πŸ” 306 πŸ’¬ 1 πŸ“Œ 0

Researchers are always neutral arbiters of truth, steadily and selflessly advancing human knowledge regardless of who funds them. Except researchers I dislike, who are shameless partisan actors.

06.03.2026 19:02 πŸ‘ 13 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

😳

05.03.2026 23:05 πŸ‘ 7 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Fondly staring off into the distance, imagining the science I could do with grant funding equivalent to three minutes of Google’s annual profits

05.03.2026 22:36 πŸ‘ 8 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1

I have to do Career Day at my kids' school, what's a good way to teach them about science? I was thinking of giving them a fun activity and then making them fill out a lot of paperwork before abruptly canceling it

04.03.2026 16:08 πŸ‘ 352 πŸ” 43 πŸ’¬ 16 πŸ“Œ 0

Another option here is Matthews et al 2009 which I’ve always found to be very clear and persuasive

04.03.2026 03:19 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Not sure if big idea, but two debates you could cover - 1) tropical Pacific SST trends as internal variability vs. forced response (Seager NCC 2019 maybe), and 2) midlatitude winter weather resulting from Arctic amplification

03.03.2026 18:59 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Reporting changes would be my guess. It's extremely rare for physicians to record heat as the cause of death using ICD codes, but I think it's become more common over time which might account for this.

02.03.2026 16:03 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

11 days left to apply for our postdoc on climate impacts and attribution here at IU!

02.03.2026 13:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Indiana University is currently implementing a similar shift in budget model. I admit to not keeping up with the details due to being very junior, but I’m not surprised to see it be a tool for politically motivated decisions

01.03.2026 20:49 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Spot on, @bobkopp.net.

β€œβ€¦saving American climate scienceβ€”and American science in generalβ€”requires that the community discard the myth of political neutrality, engage in a concerted defense of liberal democracy, and stand in solidarity with this administration’s other targets.”

01.03.2026 19:41 πŸ‘ 111 πŸ” 37 πŸ’¬ 3 πŸ“Œ 1

The unelected official heading the White House's Office of Management and Budget, Russell Vought, continues to prevent Americans from discovering new insights on:

1) how earthquakes happen.
2) how mineral resources may be found and exploited.
3) how our planet works.

01.03.2026 15:37 πŸ‘ 46 πŸ” 18 πŸ’¬ 2 πŸ“Œ 1
Preview
Comprehensive evidence implies a higher social cost of CO2 - Nature Coupling advances in socioeconomic projections, climate models, damage functions and discounting methods yields an estimate of the social cost of carbon of US$185 per tonne of CO2β€”triple the wide...

It’s good work! The other place to look for new damage function stuff since 2019 is all the work that went into the Biden social cost of carbon. e.g.: www.nature.com/articles/s41...

01.03.2026 00:02 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Scandinavian Swimmers

01.03.2026 00:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
The Macroeconomic Impact of Climate Change: Global vs. Local Temperature Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, an...

This is the other one that has caught a lot of attention - soon to be out in QJE

www.nber.org/papers/w32450

28.02.2026 23:46 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
The Global Economic Impact of Climate Change: An Empirical Perspective Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, an...

www.nber.org/papers/w34357

28.02.2026 23:41 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Post image

theonion.com/this-war-wil...

28.02.2026 11:57 πŸ‘ 3673 πŸ” 830 πŸ’¬ 41 πŸ“Œ 23
War is hell, mash meme

War is hell, mash meme

28.02.2026 12:51 πŸ‘ 553 πŸ” 208 πŸ’¬ 0 πŸ“Œ 7
Post image

The Biden Admin directed hundreds of billions to clean energy/manufacturing.

Did these investments shift public opinion?

We find that these projects are visible but not traceable: People notice nearby investments, but connect them to Governors, not Biden.

Thread πŸ‘‡
www.pnas.org/doi/10.1073/...

26.02.2026 17:20 πŸ‘ 83 πŸ” 35 πŸ’¬ 2 πŸ“Œ 5

"soup for my family" is an all-timer imo. never seen anything like it

26.02.2026 14:59 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
We need a global assessment of avoidable climate-change risks To understand the urgency of emissions reductions, policymakers and citizens need a full analysis of what is at stake.

In this week's Nature we argue there is a pressing need for a global assessment of avoidable climate-change risks. To understand the urgency of emissions reductions, policy makers and citizens need a full analysis of what is at stake including the worst-case scenarios. www.nature.com/articles/d41...

25.02.2026 17:27 πŸ‘ 9 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0
Preview
Indiana U. won a title and lost its soul | Will Bunch Newsletter Plus, the pundits are so wrong about Dems and 2028.

Indiana University's football crown was the feel-good story of the year. Off the field...not so much

Ranked last for free speech, DEI cuts, slashing the humanities while paying its coach $13M under MAGA trustees

My column on how IU ranks No. 1 in moral bankruptcy www.inquirer.com/columnists/a...

24.02.2026 17:09 πŸ‘ 342 πŸ” 146 πŸ’¬ 13 πŸ“Œ 25

came from nca5 economics chapter i think

23.02.2026 21:48 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The null hypothesis here should of course be that they'll take any opportunity to end these lawsuits. On the other hand, the administration is <2 weeks out from arguing that federal law does NOT regulate greenhouse gases! Which seems to erase the only actual argument they have here.

23.02.2026 15:00 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
SUNCOR ENERGY, INC., ET AL. V. COMM'RS BOULDER CTY., ET AL.
 The petition for a writ of certiorari is granted. In
 addition to the question presented by the petition, the parties
are directed to brief and argue the following question: Whether
this Court has statutory and Article III jurisdiction to hear
this case.

SUNCOR ENERGY, INC., ET AL. V. COMM'RS BOULDER CTY., ET AL. The petition for a writ of certiorari is granted. In addition to the question presented by the petition, the parties are directed to brief and argue the following question: Whether this Court has statutory and Article III jurisdiction to hear this case.

New: The Supreme Court takes up a MAJOR climate case that asks whether federal law preempts (that is, forbids) state-level claims against fossil fuel companies for damages related to climate change.

Climate advocates urged SCOTUS not to take this up... www.supremecourt.gov/orders/court...

23.02.2026 14:33 πŸ‘ 242 πŸ” 96 πŸ’¬ 10 πŸ“Œ 13

colin

22.02.2026 15:39 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Alysa Liu wins the Olympic gold medal for the United States
Alysa Liu wins the Olympic gold medal for the United States YouTube video by Olympics

I urge you to stop what you're doing and watch Alysa Liu's free skate from yesterday. I have never seen anything like this. I understand why sports writers are born now. I have never seen anyone as free from the burdens of this world as this pierced Oakland girl spinning to Donna Summers.

20.02.2026 16:52 πŸ‘ 5456 πŸ” 1382 πŸ’¬ 152 πŸ“Œ 324

Here is a link that should work: www.dropbox.com/scl/fi/brax8...

20.02.2026 15:49 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0