Carl Schleussner

✨ 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...

🧵 As the #OvershootConference drew to a close today, the final plenary offered a space to step back and reflect across themes. What stood out was both the urgency and interconnectedness of the challenges we face when confronting climate overshoot:

The Road Not Taken (so far) Trailer for the performative lecture taking place at the 1st Overshoot Conference on October 1st, 2pm. A performative lecture is a lecture based on an academic paper…

🎭 Science met art at the #OvershootConference today through various science-art performances. Gloria Benedikt's performative lecture, and works by the et art. collective, Mehrta Shirzadian, Lea Aigner, and Rosalie Arendt, brought new perspectives to the overshoot challenge
vimeo.com/1119056369/0...

The third and final day of the #OvershootConference kicked off with an insightful report-back and reflection session, where theme leads shared insights from their discussions so far.

See insights from discussions on Day 2 in the thread below:

Day 2 of the #OvershootConference started with a report back & reflection session followed by plenaries, panels, and parallel sessions exploring critical questions around the core conference themes.

Stay tuned for highlights, quotes, and snapshots!
ℹ️ overshootconference.org
@climateworks.org

🎤 Dr. Jimmy Fletcher, Former Minister of Saint Lucia and Founder of the Caribbean Climate Justice Project, delivered powerful remarks during a social dinner at the close of Day 1 of the #OvershootConference: “Overshoot might be a phase but never a future we accept.”
@carlschleussner.bsky.social

🌍 The first international #OvershootConference kicked off at IIASA today with an inspiring plenary session that set the tone for an important week of dialogue on pathways beyond overshoot.

First ever international conference on climate overshoot at IIASA As global temperatures approach the 1.5°C threshold, understanding the risks of climate overshoot has become an urgent scientific and policy challenge. From 30 September to 2 October 2025, IIASA will ...

Starting today: 🌍 First international conference on #ClimateOvershoot at #IIASAVienna!

📅 30 Sep–2 Oct
📍Laxenburg, Austria 🇦🇹

As we edge closer to the 1.5 °C limit, understanding the implications for mitigation, adaptation limits and climate justice has never been more urgent.
@iiasa.ac.at

🌍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/...

Episode 9: Legal and justice implications of overshoot with Lavanya Rajamani

also here and wherever you get your podcasts: open.spotify.com/episode/0pW6...

Less than 24hrs until the conference starts and our last podcast is out (in time for those of you travelling to Vienna):
overshootconference.org/the-overshoo...
The fantastic Lavanya Rajamani from @ox.ac.uk speaks about Legal and Justice Implications of Overshoot. Don't miss it 🎧

It's of course not quite the finale yet - one more podcast to come on Monday :)

Grand Finale for the Overshoot Conference Podcast: Episode 8 is out on Loss & Damage with Sindra Sharma from @canpacificislands.bsky.social

open.spotify.com/episode/5eTn...

AND: registration for the livestream of the plenary sessions is open now: overshootconference.org/registration/

And Episode 7 is online. Kristie L. Ebi speaks about: Adaptation and Adaptation Limits under Overshoot. A perspective all too often missed when we discuss climate overshoot, so make sure to tune in:
overshootconference.org/the-overshoo...
open.spotify.com/episode/6p0k...

Sorry, but disagree with @hausfath.bsky.social here. You open Pandora's box, you ain't closing it again. We've already seen with Paris that well intentioned international agreements do not translate into physical reality and SRM governance is a much harder problem. Zero is the only safe level. /1

In time for the weekend. Episode 6 🎧 Jonathan Donges from @pik-potsdam.bsky.social speaks about
Overshoot Legacy and Tipping Elements. Don't miss it 👇👇👇
overshootconference.org/the-overshoo...
and here:
open.spotify.com/episode/11F3...

Episode 5 is online. Honoured to have Debra Roberts, former @ipcc.bsky.social AR6 WG2 Co-Chair, to speak about "Climate impact (ir)reversibility"
🎧
overshootconference.org/the-overshoo...

and here: open.spotify.com/episode/2JBt...

The summer is over - and for about 16,600 people across 854 European cities that doesn't mean autumn comes, but death. People who would still be alive if it wasn't for our burning of fossil fuels. - New study with @lshtm.bsky.social www.imperial.ac.uk/grantham/pub...

Top US Energy Official Lobbies for Fossil Fuels in Europe - Inside Climate News European climate experts say the pro-fossil fuel arguments are based on climate disinformation.

For decades, there has been a highly organized war on science in the U.S., mainly funded by fossil fuel companies, and their propaganda is now official government policy.

And the episodes keep coming. Now online Episode 4 with Deliang Chen from Tsinghua University talking about "Earth System responses up to net zero and beyond" Don't miss it. 👇👇👇

Dozens of heatwaves linked to carbon emissions from specific companies Nature - Nearly one-quarter of heatwaves would have been ‘virtually impossible’ without global warming — and can be attributed to the emissions of individual energy producers.

Nearly one-quarter of heatwaves would have been ‘virtually impossible’ without global warming — and can be attributed to the emissions of individual energy producers

go.nature.com/3Kir39u

Systematic attribution of heatwaves to the emissions of carbon majors - Nature Climate change made 213 historical heatwaves reported over 2000–2023 more likely and more intense, to which each of the 180 carbon majors (fossil fuel and cement producers) substantially contributed.

🚨 Important paper in Nature: "Systematic attribution of heatwaves to the emissions of carbon majors".

www.nature.com/articles/s41...

Hot off the press: We can provide for the first time a systematic attribution of recent #heatwaves to the emissions of #carbon_majors. Essential new #Nature article coordinated by @yannquilcaille.bsky.social at @ethz.ch, with numerous contributors @usyseth.bsky.social:
www.nature.com/articles/s41...

And here comes Overshoot Podcast number 3 🎧. @iiasa.ac.at 's Keywan Riahi talks about Carbon Dioxide Removal: Sustainability Constraints and Opportunities: overshootconference.org/the-overshoo...
and here: open.spotify.com/episode/4yPi...

Out now: our new study shows that climate change caused nearly 1,700 heat-related deaths in Zürich over 50 years.

We assessed the effects of changing vulnerability to heat, heat-mortality within and outside of heatwaves, and the contribution of individual companies' emissions to heat deaths.

Klimaziel aufweichen? "Das wäre unverantwortlich", warnt Klimaforscher Riahi Österreichs Top-Wissenschafter Keywan Riahi berät die EU-Kommission und erklärt, warum Europa den Ausstoß der klimaschädlichen Treibhausgase bis 2040 drastisch senken muss

Wir können es uns nicht leisten, *keinen* Klimaschutz umzusetzen, sagt Keywan Riahi (@iiasa.ac.at).

"Denn die jetzige Misere in Europa ist ja entstanden, weil wir von fossilen Energieträgern abhängig sind und uns damit verletzlich gemacht haben."
#WissenSchafftKlimaschutz

Episode 2: Highest Possible Ambition under Overshoot with Joeri Rogelj

In the lead up to the Overshoot Conference @iiasa.ac.at Sep 30-Oct 2, the organizers had a fantastic nerdy idea to get the leading experts in their fields share their perspectives on the key themes. Highly recommend for your daily commute, background to cooking etc.: open.spotify.com/show/5MpXqh1...

Just to pick out one point: A metric should act like a 'currency' in which a tonne is a tonne. GWP* depends on time and emitting source. Even the sign. This is not a basis for decision making. GWP* us a good tool for global applications as a simple model. But that's about it.

Interesting thread. Agree with many points by @hannahdaly.ie.
Ultimately, the discussion points to what the purpose of a metric is. Leaving a paper here by @meinshausen.bsky.social and Zeb Nicholls. iopscience.iop.org/article/10.1... They argue GWP* is a model, not a metric. And I agree.
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