Andy Reisinger
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andyreisinger.bsky.social
Andy Reisinger
@andyreisinger.bsky.social
8.2K followers 940 following 220 posts

Climate science and policy. Also the occasional photo and random thoughts. Currently serving as Commissioner at He Pou A Rangi, New Zealand Climate Change Commission; former IPCC vice-chair WGIII. Usual disclaimers...

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Environmental science 36%
Economics 29%
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andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Sep 12
What does the @IPCC_CH AR6 say about GHG emission metrics (GWP, GTP, GWP* etc)? This was covered in an in-session workshop at the June #SB58 subsidiary bodies meeting of the @UNFCCC. A nerdy thread on the findings from WGIII from a mitigation perspective🧵1/26 (re-post from twitter, sorry)

Reposted by Andy Reisinger

paulbernal.bsky.social
Paul Bernal @paulbernal.bsky.social · 1d
Y’know, believing there’s a kind of racism that isn’t hurtful or insulting is itself quite revealing.

Reposted by Andy Reisinger

emilypont.bsky.social
Emily Pontecorvo @emilypont.bsky.social · 1d
UN sec. gen. Antonio Guterres got it wrong when he said "Scientists tell us that a temporary overshoot above 1.5 degrees is now inevitable." Surpassing 1.5 may be inevitable, but the "temporary" part, not so much. My Q&A w/ an expert on why COPs need to confront this. heatmap.news/climate/cop-...
The Next COP Needs to Confront ‘Overshoot’
The Paris Agreement goal of limiting warming to 1.5 degrees Celsius is now all but impossible. Limiting — and eventually reversing — the damage will take some thought.
heatmap.news

Reposted by Jan W. Mueller, Richard S.J. Tol, Andrew Scott , and 2 more

bestforbritain.org
Best for Britain @bestforbritain.org · 1d
Did you ever racially abuse fellow pupils?

It was years ago.

Did you ever racially abuse fellow pupils?

Not in a hurtful way.

Did you ever racially abuse fellow pupils?

Not with intent.

Did you ever racially abuse fellow pupils?

Not genuine abuse.

😮🫣😬😱 ~AA

Reposted by Andy Reisinger

swp-berlin.org
Stiftung Wissenschaft und Politik (SWP) @swp-berlin.org · 2d
Die globale Erwärmung könnte bis Anfang der 2030er Jahre auf über 1,5 °C steigen. Die Begrenzung von Ausmaß & Dauer des »Overshoot« stellt die Klimapolitik vor neue Herausforderungen, so Oliver Geden @swp-europe.bsky.social & @andyreisinger.bsky.social in: www.swp-berlin.org/publikation/...
Overshoot: Rückkehr zu 1,5 °C erfordert netto-negative Emissionsziele
Die globale Erwärmung wird voraussichtlich bis Anfang der 2030er Jahre über 1,5 °C steigen. Eine Rückkehr zu 1,5 °C vor Ende des 21....
www.swp-berlin.org

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 2d
As we say in the article: "A world that returns to global warming of 1.5°C will be a significantly altered and more damaged world than if this level of warming had never been exceeded."

Reposted by Peter Thorne, Andy Reisinger

dralaaclimate.bsky.social
Alaa Al Khourdajie @dralaaclimate.bsky.social · 4d
As the final text is being hammered out here in Belém for #COP30, the issue of fossil fuel phase-out is on the table again.

Looking at the actual numbers from the IPCC AR6 1.5°C assessed scenarios to decompose reduced fossil fuel output vs. carbon capture and storage - CCS (i.e. abatement)

1/3
.

Reposted by Andy Reisinger

pubaffairsbruxelles.eu
PubAffairs EU Debates, News & Opinions 🇪🇺 @pubaffairsbruxelles.eu · 6d
[Featured] #Climate - Overshoot: Returning to 1.5°C requires net-negative emissions targets, by Oliver Geden & @andyreisinger.bsky.social | @swp-berlin.org

www.pubaffairsbruxelles.eu/opinion-anal...
Overshoot: Returning to 1.5°C Requires Net-negative Emissions Targets - PubAffairs Bruxelles
Global warming is set to rise above 1.5°C by the early 2030s. Returning to 1.5°C before the end of the 21st century would not prevent all harms resulting from a period of excess temperatures, but it w...
www.pubaffairsbruxelles.eu

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 7d
Overshoot: returning to 1.5°C requires net-negative emissions targets. @swp-berlin.org policy brief with Oliver Geden.

Keeping 1.5 alive will require reframing “net-zero” as transitional stage towards net-negative GHG emissions rather than an endpoint, and policy instruments able to deliver this.
Overshoot: Returning to 1.5°C Requires Net-negative Emissions Targets
Global warming is set to rise above 1.5°C by the early 2030s. Returning to 1.5°C before the end of the 21st century would not prevent all harms...
www.swp-berlin.org

Reposted by Sanford F. Schram, Geoff Pearson, Andy Reisinger , and 1 more

atrupar.com
Aaron Rupar @atrupar.com · 7d
MBS claims the murder of Khashoggi was "a huge mistake and we're our doing our best that this doesn't happen again."

Reposted by Anne Applebaum, Timothy Snyder, Michael E. Mann , and 53 more

atrupar.com
Aaron Rupar @atrupar.com · 7d
Trump suggests Khashoggi had it coming: "You're mentioning someone that was extremely controversial. A lot of people didn't like that gentleman that you're talking about. Whether you like him or didn't like him, things happen. But he knew nothing about it. You don't have to embarrass our guest."

Reposted by Peter Thorne, Richard Betts

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 18d
The sad thing is, I remember sketching changes in temperature and heavy precip distributions in exactly this way in the early 2000s, just to now watch it play out.

The animation very much reminds me of an angry beast pulling on its chains; and they are tearing loose...
lymecfs.bsky.social Sebastiaan Deetman @lymecfs.bsky.social · 19d
Exactly! Which makes the real climate shift way scarier. Like shown by the data from svs.gsfc.nasa.gov/5452/

Reposted by Anna O. Law, Martin Paul Eve, Cathy N. Davidson , and 2 more

phileil.bsky.social
Philip Eil @phileil.bsky.social · 19d
Quite a headline.
Europeans recognize Zohran Mamdani’s supposedly radical policies as ‘normal’
Critics of New York City’s mayor-elect have said his pledges of free bus service and universal childcare are unrealistic, but in Europe it’s a given
www.theguardian.com

Reposted by Peter Thorne, Mattias Hallquist, Andy Reisinger

lymecfs.bsky.social
Sebastiaan Deetman @lymecfs.bsky.social · 19d
Exactly! Which makes the real climate shift way scarier. Like shown by the data from svs.gsfc.nasa.gov/5452/

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 19d
AI hallucinates because it’s trained to fake answers it doesn’t know. Teaching chatbots to say “I don’t know” could curb hallucinations. It could also break AI’s business model.
AI hallucinates because it’s trained to fake answers it doesn’t know
Teaching chatbots to say “I don’t know” could curb hallucinations. It could also break AI’s business model
www.science.org

Reposted by Andy Reisinger

enb.iisd.org
Earth Negotiations Bulletin @enb.iisd.org · 26d
After intensive negotiations at #IPCC63, the #IPCC achieved consensus on the outline of its Methodology Report

However, yet again the Panel was unable to agree on a workplan for the seventh assessment cycle

Read ➡️ enb.iisd.org/intergovernm...

#climate #climatechange #AR7
Highlights and images for 30 October 2025
enb.iisd.org

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 26d
Chimpanzees rationally revise their beliefs. Would be interesting to do a double blind experiment with humans.
Chimpanzees rationally revise their beliefs
The selective revision of beliefs in light of new evidence has been considered one of the hallmarks of human-level rationality. However, tests of this ability in other species are lacking. We examined...
www.science.org

Reposted by Peter Thorne

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 26d
Global methane action pays for itself at least six times over

And for fans of GHG metrics: "[...] Lastly, although the best basis for comparing methane and CO2 abatement should be relative social costs, we have found that the convention of using GWP100 is a reasonable approximation."
Global methane action pays for itself at least six times over
We provide a comprehensive assessment of the economic benefits and costs of global methane emissions abatement, anchored on the Global Methane Pledge. We use an integrated assessment model to estimate...
www.science.org

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 26d
Current rate of sea level rise is 4.7mm/year (average over past 10 years), more than twice the 20th century average rise.

Half a metre by 2100 best estimate if Paris Agreement long-term temperature goal is met - much more if not.
Future Sea-level Rise Is Certain, but the Amount and Speed Are Uncertain
The WMO co-sponsored World Climate Research Programme (WCRP)1 is at the forefront of sea-level change research. At the request of WMO Members and other United Nations entities, WCRP has developed a st...
wmo.int

Reposted by Brendan Nyhan, Juan Cole, Smith , and 4 more

melodyschreiber.com
Melody Schreiber @melodyschreiber.com · Oct 27
NEW: The entire staff supporting ACIP was laid off, and most working groups haven't met in months.

That means the US may not make routine vaccine recommendations for more than half of children in 2026, and it could halt new vaccines in the pipeline. My latest:
www.theguardian.com/us-news/2025...
Threat to US vaccines as CDC staff supporting key advisory panel laid off
Critics say scientists ‘held hostage’ by RFK Jr as changes mean vaccine development and guidance in peril
www.theguardian.com

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Oct 17
Sure, but now they will spend the next 10 years arguing over what a better policy looks like, and all the while delay domestic action by pointing to "on-going global discussions" and express their concern that domestic action could create a double burden. It is bad.

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Oct 17
Does anybody know where to find a list of how individual countries voted?

Reposted by Andy Reisinger

robinsonmeyer.bsky.social
Robinson Meyer @robinsonmeyer.bsky.social · Oct 17
Trump admin: Neoliberalism has failed. We must defend American workers by imposing much higher burdens on international trade

International Maritime Organization: You will love our new fee scheme to encourage net-zero global shipping, then

Trump: NOT LIKE THAT heatmap.news/climate-tech...
Trump Just Torpedoed Investors’ Big Bets on Decarbonizing Shipping
The delayed vote on a net-zero standard for the International Maritime Organization throws some of the industry’s grandest plans into chaos.
heatmap.news

Reposted by Andy Reisinger

ketanjoshi.co
Ketan Joshi @ketanjoshi.co · Oct 15
If things were going to plan stuff like this simply wouldn't exist. The goal here is the elimination of fossil fuels, not "lots of batteries" or "lots of solar panels"

Reposted by Julie L. Lockwood, Andy Reisinger

pammcelwee.bsky.social
Pam McElwee @pammcelwee.bsky.social · Oct 14
The US Academic Alliance for the IPCC (USAA-IPCC) and @agu.org will host webinar TOMORROW at 1pm EST on how to be an expert reviewer for @ipcc.bsky.social reports. Please register & learn how to improve science policy assessments like upcoming Special Report on #ClimateChange and Cities!
QR code to sign up for a webinar on reviewing for IPCC reports. https://agu.zoom.us/webinar/register/WN_FwfGqOFrS8yOpxPxNToZag#/registration

Reposted by Peter Thorne, Richard Betts, Jan S. Fuglestvedt , and 2 more

annualreviews.bsky.social
Annual Reviews @annualreviews.bsky.social · Oct 10
📣 2025 volume of the Annual Review of Environment and Science is online! Most read article is "Overshoot: A Conceptual Review of Exceeding and Returning to Global Warming of 1.5°C" arevie.ws/3IF0OKf @andyreisinger.bsky.social @janfuglestvedt.bsky.social @chrisd-jones.bsky.social

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Oct 3
Thanks, up look out for the podcast! If it's of interest, I recently gave a longer overview lecture on overshot for the Euro-Mediterranean Centre on Climate Change. youtu.be/TzkoJaLQ8ik

Lecture starts at 8.15 in that recording.
PowerPoint slide showing a graph with several scenarios of rising global warming above 1.5 degrees, and two scenarios where global warming exceeds 1.5 degrees for a few decades but then declines back to or below 1.5 degrees by 2100. Next to this are three 'burning embers' bars from the IPCC 6th Assessment Report that illustrate the increasing risk as global warming increases, for unique and threatened species, extreme weather events, and the distribution of impacts.

Reposted by Joeri Rogelj, Andy Reisinger

iopp-environment.bsky.social
IOPP Environment and Energy @iopp-environment.bsky.social · Sep 29
🌍New #ERL focus collection on #climate #overshoot is open!

Linked to @iiasa.ac.at Overshoots conference in Vienna this week. ERL Publisher Lauren Carter will be attending, email to discuss a contribution: [email protected]

📅Deadline: 30 April 2026
🔗 iopscience.iop.org/collections/...

Reposted by Shannon Vallor, Ben H. Ansell, Joe R. Feagin , and 32 more

404media.co
404 Media @404media.co · Sep 16
The Department of Justice has removed a study showing that white supremacist and far-right violence “continues to outpace all other types of terrorism and domestic violent extremism” in the United States.

🔗 www.404media.co/doj-deletes-...
DOJ Deletes Study Showing Domestic Terrorists Are Most Often Right Wing
Following Charlie Kirk’s assassination and the Trump administration’s promise to go after the “radical left” a study showing most domestic terrosim is far-right was disappeared.
www.404media.co

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Sep 15
"We find no significant difference between the climate strategies of companies that purchased credits and those that did not. [...] Yet, we document that for large-scale offsetters in the airline industry, carbon credit purchases competed with financing internal decarbonisation measures."
The negligible role of carbon offsetting in corporate climate strategies - Nature Communications
This study of 89 multinational firms finds no significant link between voluntarily offsetting emissions and decarbonization speed. Firms spend little funds on carbon credits, and emission offsetting i...
www.nature.com

Reposted by Andy Reisinger

rkfatheree.bsky.social
Our Lady of Perpetual Disappointment @rkfatheree.bsky.social · Sep 12
If for no other reason than to counter the apparent argument that “bad people” deserve to be shot in cold blood. Why else misrepresent his life’s work?