Incredibly proud of this major milestone in climate impact emulation. We can now provide climate risks for dozens of indicators almost in real time. Made possible by a fantastic team around Niklas Schwind, Mia Werning, Mahé Perrette, Ed Byers and many others! 👏👏👏

IIASA@iiasa.ac.at · 6d ago

Climate decisions should be based on an ensemble of projections, not a single future. A new open-source tool developed by IIASA researchers and partners makes it much faster to generate regional climate and impact projections while capturing uncertainty. 👉 iiasa.ac.at/news/jul-202...

Friendly reminder: a consortium led by Piers Forster @cjsmith.eu @wflamb.bsky.social @robinlamboll.bsky.social et al. and funded by @copernicusecmwf.bsky.social compiled the data on the global climate system... And the #ScenarioServices team at @iiasa.ac.at put together an interactive dashboard!

Daniel Huppmann@danielhuppmann.bsky.social · 2mo ago

What's the status of the global climate system? 🌍 And what's our role in the changing world? Check out our new dashboard based on the "Indicators of Global Climate Change 2025" (Forster et al. 2026). Powered by @iiasa.ac.at Funded by @copernicusecmwf.bsky.social 👉 indicators.climate.copernicus.eu

Absolutely thrilled that the Overshoot Conference is going into its second round. This year at @tsinghuauniversity.bsky.social. Call for abstract out now - hope to welcome many familiar and new faces.

IIASA@iiasa.ac.at · last mo.

🌍 Overshoot Conference 2026: Call for abstracts now open! Join researchers, policymakers, innovators & communicators in Beijing, hosted by IIASA and #TsinghuaUniversity. 📣 Submit work on mitigation, CDR, climate impacts, adaptation, governance, equity & more. iiasa.ac.at/events/nov-2...

How are impacts from extreme weather events linked to climate change? How much responsibility do large emitters such as companies or countries carry? How do scientists go about calculating these things & how is it then interpreted by lawyers in climate litigation cases? 🌪️ ⚖️

Chart of the day. The energy transition is happening in real time! 😍

40+ scientists (incl. me) warn that new methane accounting metrics such as "no additional warming", "temperature neutrality” are being used to grandfather high emitters, penalise developing countries, and undermine the Global Methane Pledge. Full statement: methanescience.org

This is an important one! If you wonder what's wrong here, see for example a paper from @joerirogelj.bsky.social and myself a while back: iopscience.iop.org/article/10.1... or also from @meinshausen.bsky.social and Zeb Nicholls: iopscience.iop.org/article/10.1...

Unintentional unfairness when applying new greenhouse gas emissions metrics at country level

Unintentional unfairness when applying new greenhouse gas emissions metrics at country level, Rogelj, Joeri, Schleussner, Carl-Friedrich

iopscience.iop.org

Michael E. Mann@michaelemann.bsky.social · 3mo ago

"Top Climate Scientists Accuse the Livestock Industry of Pushing Fuzzy Math to Downplay its Climate Warming Emissions" by @georginagustin.bsky.social for @insideclimatenews.org: insideclimatenews.org/news/2005202...

Enough has been said on the SSP5-85 debate. But what I find somewhat ironic: What the new ScenarioMIP say: a global fossil-fuel driven high-growth path is not plausible anymore. To be attacked by proponents of precisely such a narrative of economic development.

🌳🥵 🌇 In our new study (dx.doi.org/10.1088/1748-9326/ae5c20), we find that street green space (trees, bushes, green space visible to the pedestrian, etc.) can reduce urban heat stress, but even ambitious greening efforts are unlikely to offset much of the additional heat expected from climate change.

"Es gibt keinen Spielraum für Ziel-Abweichungen. Netto-Null-Ziele reichen nicht aus", sagt @carlschleussner.bsky.social im Gespräch mit @lukasbayer.bsky.social bei unserem 5vor12 Live-Briefing. #overshoot

Heute Abend im Volkstheater Wien. Veranstaltung des Netzwerk Klimajournalismus mit @lukasbayer.bsky.social. Ich freu mich drauf. @iiasa.ac.at www.volkstheater.at/event/332609...

CLIMATE OVERSHOOT –WIE KRIEGEN WIR NOCH DIE KURVE? - Volkstheater Wien

volkstheater.at

🌳A new IIASA-led study shows that expanding street green space can reduce urban heat stress, but it won’t be enough to offset climate change on its own. While having greener streets help, broader, context-specific adaptation will be essential. 👉 iiasa.ac.at/news/apr-202... @tuberlin.bsky.social

Street green space can help cool cities, but it will not be enough on its own

A new IIASA-led study finds that expanding street green space can reduce urban heat stress in cities worldwide, but even ambitious greening efforts are unlikely to offset a significant share of the additional heat expected under climate change. Instead, the research shows that street greenery should be part of a broader portfolio of urban adaptation measures.

iiasa.ac.at

In ihrem aktuellen FAZ-Gastbeitrag beklagt Katherina Reiche eine "Selbsttäuschunug" in der Energiepolitik. Tatsächlich fällt der Täuschungsvorwurf aber teilweise auf sie selbst zurück, denn der Text enthält diverse falsche oder irreführende Zahlen. Ein Thread. (1/17) www.faz.net/aktuell/wirt...

So... now we can breathe again. Let's talk about ScenarioMIP. The final version is now up on GMD - and there's some changes since the first draft. /THREAD/ gmd.copernicus.org/articles/19/...

The Scenario Model Intercomparison Project for CMIP7 (ScenarioMIP-CMIP7)

Abstract. Scenarios serve as a critical tool in climate change analysis, enabling the exploration of future evolution of the climate system, climate impacts, and the human system (including mitigation...

gmd.copernicus.org

Emission scenarios inevitably embed assumptions about fairness. Tracking these assumptions is genuinely difficult, but making them transparent matters. We developed a framework to do just that. @ic-cep.bsky.social #IIASA @imperialcollegeldn.bsky.social 1/2

In a new Nature study, we show that extreme global climate outcomes may occur even under moderate 2°C warming for several sectors. The findings reinforce the urgency of limiting warming well below 2°C. Together with @erichfischer.bsky.social @janasillmann.bsky.social @zscheischlerjak.bsky.social

Moderate global warming does not rule out extreme global climate outcomes - Nature

Extreme global climate outcomes may occur even under moderate 2 °C warming and may turn out to be more extreme than model-averaged projections at 3 °C or 4 °C warming.

nature.com

NEW STUDY: Winter downpours are getting heavier in parts of Spain, Portugal and Morocco as the region recovers from a month of relentless storms. Between mid-January and mid-February nine named storms brought torrential rain hurricane force winds causing major damage and disruption. 1/5

🌍 Just published: The hard road back from overshoot by IIASA Journalist in Residence, @lisapalmer.bsky.social. The piece examines some of the realities of climate overshoot and features insights from IIASA's @carlschleussner.bsky.social & @joerirogelj.bsky.social. 👉 www.nature.com/articles/s41...

The hard road back from overshoot - Nature Climate Change

As global temperatures move beyond 1.5 °C, overshoot now defines the landscape ahead, sharpening legal claims, exposing economic risks and revealing how far politics still trail the pace of change.

nature.com

The Mediterranean is a hotspot of climate change, not only due to more heat, droughts and wildfires, but increasingly severe rainstorms led to catastrophic flooding this winter, highlighting again the urgent need to transition away from fossil fuels. www.worldweatherattribution.org/increasingly...

Can climate mitigation scenarios be trusted without equity at their core? A new @plosclimate.org study "highlights a research agenda combining incremental improvements & participatory approaches - practical yet ambitious” says @joerirogelj.bsky.social iiasa.ac.at/news/feb-202...

Rebuilding trust in global climate mitigation scenarios

A new IIASA-led study examines growing critiques of how global climate mitigation scenarios address equity and justice and identifies key conditions for fair, feasible, and politically credible climat...

iiasa.ac.at

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

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.

nature.com

*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

Future Earth@futureearth.bsky.social · 7mo ago

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...

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.

Centre for Research on Energy and Clean Air@creacleanair.bsky.social · 6mo ago

🇪🇺 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/...

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

D & A style attribution with fair and HadCRUT5 updated to 2025 (emissions extrapolated beyond 2022, but should make little difference) [code: github.com/chrisroadmap...

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...

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.

nature.com

Carbon Brief@carbonbrief.org · 7mo ago

NEW – Analysis: The climate papers most featured in the media in 2025 | @rtmcswee.carbonbrief.org @ayeshatandon.carbonbrief.org Read here: buff.ly/sF3cD1c

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

theguardian.com

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