David Keith

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David Keith

David Keith

@DKeithClimate

Climate science and technology policy since 1989. Building Climate Systems Engineering @UChicago. Founded Carbon Engineering. Bluesky: @davidkeith.bsky.social

2/3 Chicago & 1/3 Canmore Katılım Eylül 2015
210 Takip Edilen9.6K Takipçiler
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David Keith
David Keith@DKeithClimate·
New paper: "Solar Geoengineering: History, Methods, Governance, Prospects" by @parson_ted & me in Annual Reviews. Full text at: davidkeith.earth/publication/so… I am particularly proud of this paper. This thread provides some highlights: 1/8
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Leon Simons 🌍
Leon Simons 🌍@LeonSimons8·
'A Responsible Way to Cool the Planet'?! On Climate Chat, we talked about the @nytimes article by @hausfath and @DKeithClimate. Humanity will be forced to make a balanced assessment of the risks of (intentionally) cooling vs not cooling the planet. More than what we do now.
Zeke Hausfather@hausfath

To that end, we propose replacing the cooling from current air pollution be used as a clear, enforceable upper limit. And it should come with a clear off-ramp: as the world reaches net-zero emissions and scales up carbon removal technologies later in the century, the program ratchets down to zero.

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David Keith
David Keith@DKeithClimate·
@mattkahn1966 It is false to claim that we assume no adaptation. We used the strong adaptation case in Carelton et al. Caveat: The temperature mortality econometric are not mine, and I am no expert.
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Matthew E. Kahn
Matthew E. Kahn@mattkahn1966·
The New York Times likes to profile David Keith's ideas about the benefits of geoengineering projects. Here is my June 2025 reply. The expected PDV of the benefits of his projects are negatively correlated with adaptation progress!! (1/2) matthewekahn.substack.com/p/a-microecono…
Matthew E. Kahn@mattkahn1966

Here is a calm NY Times piece making the case for investing in geoengineering solutions to cool the planet. Tomorrow, I'll release a Substack pointing out the unstated (and untested) social science assumptions that underlie their benefits calculations. nytimes.com/2025/09/21/opi…

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David Keith
David Keith@DKeithClimate·
@DoctorVive @nytimes @nytopinion This is false. Carbon engineering has nothing to do with solar geoengineering, folks at CE oposed my involvement in SRM. And, while I was the founder, I have no involvement anymore. Not do I have a financial interest in any other climate commercial venture. Please retract.
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David Keith
David Keith@DKeithClimate·
@hausfath @logicsmightwork @nytopinion Second, one can slowly phase out SRM, even if concentrations have not been reduced with carbon removal. The result is same temperature than without SRM, but Earth reaches that temperature more slowly, and that can be a big benefit as many climate risks depend on rate of change.
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Zeke Hausfather
Zeke Hausfather@hausfath·
I have a new @nytopinion guest essay w/ @DKeithClimate about sunlight reflection. We note its not a solution for climate change and at best a band aid to treat systems, and suggest if its ever done it should only be to replace cooling from air pollution today.
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David Keith
David Keith@DKeithClimate·
First, it ties use of SRM to clean up of pollution, and since this pollution is mostly from burning fossil fuels, this is roughly equivalent to tying use of SRM to cuts in fossil fuels; and second, it provides a non-arbitrary fixed upper limit on how much SRM can be deployed. 3/4
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Keşfet

@LeonSimons8 @peakaustria @PPDavidDennison @nytimes @hausfath @mattkahn1966 @DoctorVive @nytopinion