Carl Schleussner
carlschleussner.bsky.social
Carl Schleussner
@carlschleussner.bsky.social
Climate Scientist at @iiasa.ac.at and Humboldt Universität zu Berlin Views are my own.
Reposted by Carl Schleussner
For a decade, the Shared Socioeconomics Pathways #SSP are used for scenario research related to climate change mitigation.

Now, GDP & population projections were updated by @iiasa.ac.at & the team at the #OECD, and the #ScenarioServices team set up a new interactive app to explore the scenarios!
Shared Socioeconomic Pathways | Scenario Explorer hosted by IIASA
The Shared Socioeconomic Pathways (SSPs) are a set of scenarios that describe potential future developments in society, economics, and demographics until the end of the 21st century. This Explorer pre...
ssp.apps.ece.iiasa.ac.at
February 2, 2026 at 11:11 AM
Reposted by Carl Schleussner
No joke: I got angry hate mail today for writing an obituary of a Black woman scientist—because the person felt she did didn’t deserve the recognition.

Which just makes me want to share it again: www.nature.com/articles/d41...
Gladys Mae West obituary: mathematician who pioneered GPS technology
She made key contributions to US cold-war science despite facing huge barriers as a Black woman.
www.nature.com
February 6, 2026 at 9:09 AM
Reposted by Carl Schleussner
*DEADLINE EXTENDED* February 8

Submit your suggestions and nominate (yourself or others) as a co-author for the 2026 edition of the 10 New Insights in Climate Science
What climate insights are policymakers missing?

If you’re working on new or emerging climate research, now’s the time to surface it.

Help shape the 2026 10 New Insights in Climate Science.

Submit by 31 Jan 2026: form.jotform.com/Future_Earth...
10 New Insights in Climate Science - CALL FOR EXPERT INPUT 2026
Please click the link to complete this form.
form.jotform.com
February 5, 2026 at 8:31 AM
Reposted by Carl Schleussner
New from us: The average EU citizen spent EUR880 on fossil fuel imports in 2025, as gas imports increased and the U.S. became the largest supplier. Slow progress on electrifying transport and buildings as well as building wind power are harming the bloc's economy and energy security.
🇪🇺 NEW | REPORT: EU CO2 emissions & fossil fuel imports review reveals emissions fell by only 0.8% in 2025; clean energy investments lag behind fossil fuel imports

🇺🇸 U.S. now EU's largest fossil fuel supplier; average EU citizen spent EUR 150 on imports⤵️

energyandcleanair.org/publication/...
energyandcleanair.org
January 29, 2026 at 12:23 PM
How should climate science and policy respond to a potential exceedance of 1.5°C? We provide our perspective on this in a new @Nature comment 🔗 nature.com/articles/d41586-026-00247-y led by Gaurav Ganti with Sabine Fuss, @joerirogelj.bsky.social, @setupelz.bsky.social & Keywan Riahi 1/
Exceeding 1.5 °C requires rethinking accountability in climate policy
A scientific foundation is required to establish nations’ responsibilities in a hotter ‘overshoot’ world.
nature.com
January 28, 2026 at 10:02 PM
Reposted by Carl Schleussner
D & A style attribution with fair and HadCRUT5 updated to 2025 (emissions extrapolated beyond 2022, but should make little difference)

[code: github.com/chrisroadmap...
January 27, 2026 at 1:56 PM
Reposted by Carl Schleussner
Last week, @carbonbrief.org listed the top climate papers that were the most featured in the media. Proud to have our paper in #8!
The paper here: www.nature.com/articles/s41...
January 22, 2026 at 6:17 AM
Reposted by Carl Schleussner
If the last decade has taught Europe anything, it should be that reliance on fossil fuel imports is a strategic liability which will be exploited.

Climate aside, decarbonisation is security.

www.theguardian.com/world/2026/j...
Trump has growing stranglehold over EU and UK energy supply, study shows
European countries now reliant on US liquified natural gas shipments, creating risk of higher bills amid recent tensions
www.theguardian.com
January 21, 2026 at 9:58 AM
Reposted by Carl Schleussner
Preprint out today in ESDD.

SRM's biggest risk is us.

'Peak-shaving' is a best-case scenario, with strong governance and international cooperation.

We propose a framework for messier geoengineering futures, which look more like, you know, the news. /1

egusphere.copernicus.org/preprints/20...
Robust assessment of Solar Radiation Modification risks and uncertainties must include shocks and societal feedbacks
Abstract. Conventional climate scenarios omit fast-timescale human-system dynamics like policy rollback or economic shocks. The climate system's slow response to GHG emissions allows these `fast' ter...
egusphere.copernicus.org
January 15, 2026 at 12:54 PM
Reposted by Carl Schleussner
Submissions for abstracts to EGU26 are open until next week.

@imenke.bsky.social , @etheokritoff.bsky.social , Noah Walker-Crawford, @rosapietroiusti.bsky.social , and I are looking forward to your contributions to our climate science and litigation-themed outreach session.
⚖️ Are you working on topics that could be relevant for climate litigation?

➡️ Submit an abstract to our outreach session (which allows you to submit a second abstract)
#EGU26

meetingorganizer.copernicus.org/EGU26/sessio...
January 8, 2026 at 5:45 PM
Reposted by Carl Schleussner
In the world we live in today, that is 1.3C warmer due to our continued burning of fossil fuels, the extreme rainfall leading to disastrous flooding in many parts of Asia is up to 50 to 160% more intense - new @wwattribution.bsky.social study www.worldweatherattribution.org/increasing-h...
December 11, 2025 at 8:19 AM
Reposted by Carl Schleussner
Zum Abschluss der #COP30 hat die @wienerzeitung.at mehrere Expert:innen um Antworten auf die drängenden Fragen gebeten: Klimaangst, soziale Dimension der Emissionen und Auswirkungen, Rahmenbedingungen & Strukturen, das Pariser Klimaabkommen, Handlungsoptionen...
#WissenSchafftKlimaschutz
Was von der COP30 bleibt: Expert:innen zu drängenden Fragen rund um das Klima | WZ • Wiener Zeitung
Abschluss der 30. Weltklimakonferenz: Expert:innen zu drängenden Fragen rund um das Klima
www.wienerzeitung.at
November 22, 2025 at 6:26 AM
Reposted by Carl Schleussner
⚖️ Are you working on topics that could be relevant for climate litigation?

➡️ Submit an abstract to our outreach session (which allows you to submit a second abstract)
#EGU26

meetingorganizer.copernicus.org/EGU26/sessio...
November 7, 2025 at 9:22 AM
A fantastic effort from the @carbonbrief.org team pulling this together.
A great resource summarising major outcomes and process at COP30. A must read 👇👇👇

And just a day after the gavel came down. Impressive. I bet next year, they'll beat the COP closing plenary :)
NEW – COP30: Key outcomes agreed at the UN climate talks in Belém

Read here ➡️ buff.ly/3isyGpX

#COP30
November 23, 2025 at 7:25 PM
Reposted by Carl Schleussner
2025 was again a severe #hurricane season with 4 major hurricanes (3 cat 5 hurricanes).
In terms of accumulated cyclone energy (ACE) it was slightly above a normal season.
Seasonal forecasts (including ours 🥳) predicted the ACE well this year 💪
November 20, 2025 at 9:49 PM
Reposted by Carl Schleussner
Against the backdrop of negotiations at #COP30, leading climate scientists have released the Búzios Scientific Statement, offering a clear assessment of the world’s remaining options to return to 1.5°C of warming by the end of the century.

🔗 iiasa.ac.at/news/nov-202...
November 17, 2025 at 3:35 PM
Reposted by Carl Schleussner
Búzios Scientific Statement

100 climate researchers, coordinated by @pik-potsdam.bsky.social & @iiasa.ac.at, released a joint statement to inform the #COP30 negotiations and provide guidance on difficult but doable global efforts designed to limit dangerous overshoot of 1.5°C as much as possible.
Búzios Scientific Statement.pdf
drive.google.com
November 15, 2025 at 4:36 PM
There's an science statement that emerged from this weeks IAMC conference in Buzios, Brasil

5 key insights including 2035 benchmarks for GHG and fossil fuel reductions, PV+Solar upscaling

Check it out here: drive.google.com/file/d/1ofMw...

Open for sign-up here: forms.gle/FPrV3w6cMu8h...
November 15, 2025 at 1:21 PM
Reposted by Carl Schleussner
Check out the IEA NZE here tinyurl.com/2ctf7mrx (but ignore the unrealistic-zombie-nightmare (CPS) scenario)

For a nice comparison, see this new high ambition pathway by @climateanalytics.org and the REMIND team at @pik-potsdam.bsky.social - tinyurl.com/y9m8z8jk
Rescuing 1.5°C: new evidence on the highest possible ambition to…
This study shows that, even after years of insufficient action, the world can still return to well below 1.5°C of warming this century if countries pursue the “highest possible ambition” in climate ac...
climateanalytics.org
November 12, 2025 at 5:07 PM
Climate emulators are a great tool to explore a wide range of possible climate futures. Here comes MERCURY - utilising the power of image-compression-based techniques for memory-efficient emulation. Fantastic work led by @shrutinath97.bsky.social agupubs.onlinelibrary.wiley.com/doi/10.1029/...
MERCURY: A Fast and Versatile Multi‐Resolution Based Global Emulator of Compound Climate Hazards
Climate model emulators traditionally generate global fields amounting to Peta-Bytes of data We introduce the emulator MERCURY, that employs a lifting scheme based on image compression techniques...
agupubs.onlinelibrary.wiley.com
November 10, 2025 at 1:36 PM
Excellent compilation of viewpoints in @natclimate.nature.com on the Paris Agreement Articles. Honoured to have contributed together with a fantastic group of experts. 👇👇👇
November 7, 2025 at 5:30 AM
Reposted by Carl Schleussner
Stories abound these days showing that global warming exceeding 1.5C is now part of science's best estimate.

What does that mean for the #ParisAgreement 1.5C goal?

A good time to revive a thread about a piece we wrote earlier this year on this topic in @science.org 👇🌍🌡️
What becomes of the 1.5°C goal now that global warming is approaching that level?🌍🔥🌡️

In a new @science.org Policy Forum we explain how the 1.5°C goal remains a critical legal & ethical benchmark, even as the world nears and may soon exceed 1.5°C of global warming🧵1/
www.science.org/doi/10.1126/...
The pursuit of 1.5°C endures as a legal and ethical imperative in a changing world
As the world nears 1.5°C of global warming, near-term emissions reductions and adequate adaptation become ever more important to ensure a safe and livable planet for present and future generations
www.science.org
November 6, 2025 at 5:49 PM
Reposted by Carl Schleussner
COP30: Study reveals “highest possible ambition” for countries' climate pledges

With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵

Learn more: ow.ly/CiB050XnMK2
COP30: Study reveals “highest possible ambition” for countries' climate pledges | Imperial News | Imperial College London
A new study, for the first time, shows how the ‘highest possible ambition’ of countries' climate pledges can be assessed.
ow.ly
November 6, 2025 at 2:07 PM
Reposted by Carl Schleussner
November 4, 2025 at 9:47 AM
Reposted by Carl Schleussner
I'm proud to be part of the 2025 #TIME100Climate list of influential leaders.

Link to the full list of 2025 #TIME100Climate
time.com/collections/...

Link to my page in the 2025 #TIME100Climate
time.com/collections/...
Yann Quilcaille: The 100 Most Influential Climate Leaders of 2025
Find out why Yann Quilcaille is on TIME's 2025 list of the 100 most influential leaders driving business climate action.
time.com
October 30, 2025 at 3:12 PM