Andy Reisinger
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andyreisinger.bsky.social
Andy Reisinger
@andyreisinger.bsky.social
8.1K 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 Peter Thorne, Richard Betts

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 2d
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 · 3d
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 · 3d
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 · 3d
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 · 4d
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 · 11d
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 · 11d
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 · 11d
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 · 11d
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

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · 24d
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 · 24d
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 · 24d
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 · 26d
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 · 27d
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: Lauren.Carter@ioppublishing.org

📅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?

Reposted by Smith, Andy Reisinger, Nathan P. Kalmoe

michaelhobbes.bsky.social
Michael Hobbes @michaelhobbes.bsky.social · Sep 12
"Charlie Kirk gave me the courage to be more transphobic" is a wild thing to put in a both-sides hagiography
www.nytimes.com/2025/09/11/u...
‘He Gave Me Confidence’: How Charlie Kirk Connected With Young Men With his right-wing group Turning Point USA, Mr. Kirk engaged controversial topics. Some students were inspired. Others found his views appalling. As a Christian, he did not always feel he could say what he actually thought about the issue. “It’s kind of scary to say what you believe in, especially in this cancel culture,” said Porter LaFeber, a 22-year-old studying sciences at Utah Valley University who was at an event on Wednesday where Mr. Kirk was killed. “Charlie Kirk seemed like he just went totally above that. He kind of gave a voice to the people that were maybe a little bit scared.” “He gave me the confidence to be able to believe what I believe,” Mr. LaFeber added.

Reposted by Andy Reisinger

saycheeselouise.bsky.social
Louise Hutt @saycheeselouise.bsky.social · Sep 12
Even if you don't vote for your council (pls do but), tick that box for the referendum.

It is BINDING for three terms - so if it fails, no Māori ward for nearly a decade.

And EVERYONE votes, not just Māori. Tāngata Tiriti step up, Pākehā mā, you need to vote.

Reposted by Richard S.J. Tol, Andy Reisinger

mclem.org
Michael Clemens @mclem.org · Sep 11
The US Administration, champion of sovereignty, vows to punish Brazilians for enforcing Brazilian laws broken by a Brazilian citizen in Brazil.

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Sep 10
#climatechange #JobAlert the New Zealand Climate Change Commission, He Pou A Rangi, is looking for a Principal Analyst, Analytics and Economics. Closing 26 September.

Scope includes advice on NZ ETS settings, emissions reduction monitoring, and advice on emissions budgets and targets.
Climate Change Commission job - Principal Analyst – Analytics and Economics
centralagenciesjobs.cass.govt.nz

Reposted by Peter Thorne

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Sep 10
We'll cross global warming of 1.5°C in the next 5 years or so - what then?

I'll explore the challenges and choices we're facing with climate overshoot in a lecture on 18 September for the Centro Euro-Mediterranneo sui Cambiamenti Climatici

www.cmcc.it/lectures_con...
Advertisement for lecture "Overshoot: challenges and choices after we exceed 1.5°C", by Andy Reisinger, for the lecture series of the Centro Euro-Mediterraneo sui Cambiamenti Climatici (Euro-Mediterranean Centre for Climatic Changes)

Reposted by Valerie M. Delmotte, Glen P. Peters, Peter Thorne , and 10 more

soniaseneviratne.bsky.social
Prof. Sonia I Seneviratne @soniaseneviratne.bsky.social · Sep 6
New starter pack with @ipcc.bsky.social #AR7 scientists (bureau, authors, REs)! Full list: apps.ipcc.ch/report/autho...
For SR cities scientists see separate starter pack!
@dianaurge.bsky.social @sherilee.bsky.social @siir-kilkis.bsky.social @janfuglestvedt.bsky.social
go.bsky.app/2FuXb3Y

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Sep 6
An in a simplistic interpretation, a company that has negative emissions is owed a reward (like people planting trees), whereas a company that has positive emissions has to pay a price for its emissions. Agree the problem is not GWP* as such, but misinterpretation what those numbers mean for policy.

andyreisinger.bsky.social
Andy Reisinger @andyreisinger.bsky.social · Sep 6
The issue is that in a simplistic interpretation of the numbers that GWP* provides, a factory that drops its historically high emissions will report negative emissions based on GWP*, whereas the same factory will still report positive emissions using GWP.

Reposted by Ben Bond‐Lamberty, Andy Reisinger

glenpeters.bsky.social
Glen Peters @glenpeters.bsky.social · Sep 3
The DIAMOND project has made an important milestone: the first draft release of six open integrated assessment models (IAMs) that are emblematic in both scientific and policy processes. Now is the chance to contribute and provide feedback!
preview.mailerlite.com/y7x9l4x1r1
In info graphic of six IAMs

Reposted by Andy Reisinger

watershedlab.bsky.social
Dr Dan Shugar 🇨🇦 @watershedlab.bsky.social · Sep 1
@margaretatwood.bsky.social is a goddamn national treasure.
A tweet by Margaret Atwood about how stupid Alberta politics are with specific wrath aimed at the Minister of Education

Reposted by Andy Reisinger

policyrelevant.bsky.social
Rob Ralston @policyrelevant.bsky.social · Aug 28
great reporting by @desmog.com on Saudi Aramco's strategy to 'future proof' its image, while continuing to massively expand fossil fuel and petrochemical production
Exclusive: Ad Giant IPG Accused of Breaking 'Industry First' Climate Policy With Work for World’s Biggest Oil Company
Firm’s top London consultants planned to help Saudi Aramco influence policymakers, leaked documents reveal.
www.desmog.com