Carl Schleussner

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

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

⚖️ 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...

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 :)

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 💪

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...

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.

Here are the benchmarks, based on a novel post-AR6
database that's forthcoming under the Scenario Compass Initiative coordinated at @iiasa.ac.at
scenariocompass.org

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...

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...

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

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...

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/...

Excellent compilation of viewpoints in @natclimate.nature.com on the Paris Agreement Articles. Honoured to have contributed together with a fantastic group of experts. 👇👇👇

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 👇🌍🌡️

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.

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

Announcement for the EGU session on Climate Risk Assessment, including QR code and short description.

Excited to announce our #EGU26 session on Climate Risk Assessment for Finance & Insurance Sectors with @mattpriestley.bsky.social A. Ciullo @hcbloomfield19.bsky.social @natalieslord.bsky.social

meetingorganizer.copernicus.org/EGU26/sessio...

@iiasa.ac.at @riskkan.bsky.social @lamont.columbia.edu

Haha, amazing. How to scare a climate scientist in 2025 😄

Fantastic news Yann. What a great recognition of your (already now) seminal work. Huge congratulations, you've all the reasons in the world to be very proud!

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.

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/...

This is how climate injustice unfolds. There is both an economic logic to cutting emissions now & a moral imperative to rapidly scale up international finance for loss and damage and adaptation in the most vulnerable countries.

Multi-century global and regional sea-level rise commitments from cumulative greenhouse gas emissions in the coming decades - Nature Climate Change It is important to understand how much long-term sea-level rise is already committed due to historical and near-term emissions. Here the authors use a modelling framework to show how decisions on glob...

Really important paper led by my @iiasa.ac.at colleague Alex Nauels www.nature.com/articles/s41...
“The difference between decisive climate action today and continued high emissions is not just measured in degrees of warming but also in meters of sea-level rise” 👏👏👏

New research shows that near-term mitigation could spare future generations around 0.6 meters of sea-level rise caused by emissions between 2020 and 2090, making today’s decisions critical not only for limiting warming but also for coastal impacts.

🔗 iiasa.ac.at/news/oct-202...

The responsibility of investor-owned carbon majors to contribute to direct air carbon capture and storage investment Carbon dioxide removal (CDR) options are critical for achieving global climate objectives. Yet, many proposed removal technologies are in their formative phase. Significant near-term investments ar...

The world’s largest fossil fuel and cement companies should shoulder a major share of the investment needed to develop carbon removal technologies, according to a new peer-reviewed study in @climate-policy.bsky.social. #carbonmajors #CDR #climatepolicy

Merz & Co wollen die EU-Klimaziele aufweichen?! Nicht mit uns 😡 In einem offenen Brief mit Wissenschaftler*innen fordern wir die Bundesregierung jetzt auf, sich für ein starkes Ziel von mind. 90% Reduktion bis 2040 einzusetzen & nicht noch zu verzögern!
👉 fridaysforfuture.de/offener-brie...

Wie sich das 1,5-Grad-Klimaziel noch retten lässt Klimaforscher Carl-Friedrich Schleußner erklärt, warum wir nur mehr in der zweit- oder drittbesten Welt leben – und wie sich CO2 aus der Atmosphäre holen lässt

🎙️ #EditionZukunft @derstandard.at

Über das Konzept #Overshoot und die Dringlichkeit rascher Reduktion unserer Treibhausgas-Emissionen zur Minimierung der Risiken durch die Erderhitzung.

@carlschleussner.bsky.social vom @iiasa.ac.at im Gespräch mit @philippramer.at
#WissenSchafftKlimaschutz

Der @derstandard.at hat unserer Overshoot Konferenz noch ein längeres Interview gewidmet 👇👇👇

www.derstandard.at/story/310000...

Overshoot: Exploring the implications of meeting 1.5C climate goal ‘from above’ - Carbon Brief The first-ever international conference on the contentious topic of “overshoot” was held last week in...

📰 Your evening read on the IIASA #OvershootConference: @carlschleussner.bsky.social tells @carbonbrief.org that the scientific community is only just “beginning to appreciate” the need to understand & quantify how different overshoot pathways affect adaptation. www.carbonbrief.org/overshoot-ex...

Experts: The key ‘unknowns’ of overshooting the 1.5C global-warming limit - Carbon Brief On the sidelines of a conference, Carbon Brief asked a range of experts what they consider to be the key “unknowns” around overshoot.

NEW – Experts: The key ‘unknowns’ of overshooting the 1.5C global-warming limit | @ceciliakeating.carbonbrief.org and @rtmcswee.carbonbrief.org

Read here: buff.ly/yPWMH59

Last week, @ceciliakeating.carbonbrief.org and I attended the first-ever conference on climate "overshoot" in Vienna.

Here's our summary of the wide-ranging discussions. (Bearing in mind we were two journalists covering 8 conference themes...!)

Overshoot: Exploring the implications of meeting 1.5C climate goal ‘from above’ - Carbon Brief The first-ever international conference on the contentious topic of “overshoot” was held last week in...

Super comprehensive report on our @iiasa.ac.at overshoot conference by @carbonbrief.org. Great summary and overview on some of the central discussion points. Check it out👇👇👇
www.carbonbrief.org/overshoot-ex...

✨ The reflections sent a powerful message: overshoot is not just a scientific scenario, it is a lived reality that compounds risks, deepens inequities, & raises questions of justice. Responding requires courage, collaboration, & commitment across all levels of society.

ℹ️ overshootconference.org

In Ö entfallen mehr als 50 % der #Treibhausgase auf die obersten 10 %. 🏭💨

Höchste Zeit, Reiche und Konzerne stärker in die Pflicht zu nehmen, meinen @nicolasprinz.bsky.social, @sixev4.bsky.social & Judith Derndorfer: www.awblog.at/klima-energi...