Yes, if AMOC shuts down, it may release hundreds of billions of tonnes of CO₂. You know what's guaranteed to release hundreds of billions of tonnes of CO₂ in the next few years? Our continued use of fossil fuels.

The climate #litigation pico session and splinter meeting are back at #EGU26! ⚖️ We’re looking forward to another round of enriching, highly interdisciplinary talks and discussions. Based on this year’s impressive line-up of abstracts and speakers, it’s set to be a great one.

I have updated Tidy GHG Inventories - a dataset of greenhouse gas emissions based on country submissions to the UNFCCC. Summary figures: lambwf.github.io/Tidy-GHG-Inv... Dataset: zenodo.org/records/1969... This version has much more detailed energy sector data⚡including the split by fossil fuel 🛢️

Big step for #CMIP7: the Rapid Evaluation Framework (REF) is taking shape, enabling faster, more systematic climate model evaluation for the #IPCC AR7 cycle. We've been working hard at: Better evaluation → more transparent models → stronger decisions. 🔗 www.linkedin.com/posts/climat...

New review paper on "The implications of overshooting 1.5 °C on Earth system tipping elements" Main points: Overshooting 1.5°C raises risks of irreversible Earth-system tipping, which depends on peak warming and more so on how long critical thresholds are exceeded. doi.org/10.1088/1748...

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/

US withdrawal from Paris takes effect today. Our new analysis shows progress, and defines the gap to 1.5°C that we can still (and must) close. The report: www.climate-resource.com/reports/ndcs... ; The summary: www.climate-resource.com/reports/ndcs...

January 23, 1957 – New Zealand scientist warns about consequences of carbon dioxide build-up allouryesterdays.info/2023/01/22/j...

Spiralling global temperatures (1850-2025) The last 3 years really jump out, rather like 2015-6 did when we first produced this graphic back then. Now, 2015-6 looks rather cool... More on the spiral: doi.org/10.1175/BAMS...

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.

CO2 Newsletter Vol. 1 no. 1 (Oct 1979) is live! Between 1979 and 1982 American geologist William N. Barbat published 18 issues. Each was 8 pages of news (scientific abstracts, testimony, science and policy reports) editorials, investigations etc. 1/2 allouryesterdays.info/2026/01/05/c...

December 24, 1968 – “Earthrise” photo allouryesterdays.info/2022/12/23/d...

And Christmas came early: Asmania et al took an important hurdle in their lawsuit against carbon major Holcim, which was today admitted to proceed to trial. Noone is above the law!

“Playing the market”, but for real.

⚖️ 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...

目标类型及描述。争取到 2035 年温室气体排放水平稳 中有降，比 2030 年下降 5%以上。 "Target type and description: Strive to achieve a stable to slightly reduced level of greenhouse gas emissions by 2035, with a decrease of more than 5% compared to 2030." (Google Translated.)

I've finally got around to curating a selection of films about the #climate crisis 🎥 There's lot of mediocre climate films out there, but for me these stand out head & shoulders above the rest 🎞️ They make excellent resources for classrooms, lecture halls, or community cinema's 🎬 Thread:🧵Plz RT

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.

🚨 BREAKING: The European Court of Human Rights @ECHR_CEDH has ruled in @GreenpeaceNorge and Others v. Norway. The decision is an important step for #ClimateJustice. Here’s why it matters 🧵

Our new brief “Pre-COP30: how are temperatures tracking on the latest targets?” is here: www.climate-resource.com/reports/ndcs... #ClimateAction #COP30 #ClimateFinance

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” 👏👏👏

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...

A request for weather interested volunteers! Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue Anyone can help: www.zooniverse.org/projects/met...

This is a good corrective to the BS narrative flowing through the Pielke/AEI/NYP/EID/DOE nexus. Their argument is designed so that we can never ever attribute extreme events to emissions - even singular events that would have *never* [for some suitable finite approximation] have happened before.

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...

🚨NEW PAPER🚨 We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...

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...

⚡ ⚖️ 🌐 upcoming #𝐂𝐥𝐢𝐦𝐚𝐭𝐞𝐋𝐢𝐭𝐢𝐠𝐚𝐭𝐢𝐨𝐧: Asmania v. Holcim Crucial hearing upcoming in Switzerland, this could set a precedent for holding climate polluters accountable. 📅 Wed, 3 Sept 2025 – starting at 8:30 am CEST 📍 Cantonal Parliament of Zug🇨🇭 👇 A brief thread🧵

🔥 Just published! 🔥 Our new manuscript on global #wildfires look beyond burned areas and ask: What drives the #economic damages of wildfires — now & in the future? We find that socioeconomic vulnerability, not just #climate, is key. 📄 iopscience.iop.org/article/10.1... (Highlights below ⬇️)

*** Faktencheck*** In der Generaldebatte im Bundestag sprach Bundeskanzler Friedrich #Merz auch zum Klimaschutz. Er sagte: "Selbst wenn wir alle morgen klimaneutral wären, würde keine einzige Naturkatastrophe weniger geschehen". Ein Faktencheck. 1/

New study out, in which we detect a causal link in reanalysis+observational data from an AMOC SST index to the Southern Amazon rainforest: dry season precipitation increases when the AMOC weakens. doi.org/10.1088/1748...

🌎 New research led by IIASA researcher @hoegner.bsky.social shows a link between two major climate tipping elements: the Southern Amazon rainforest and the Atlantic Meridional Overturning Circulation (AMOC). 👉 iiasa.ac.at/news/jun-202... @pik-potsdam.bsky.social @ioppublishing.bsky.social

New paper on the risks of forest ecosystem impacts under emissions pathways designed to meet the Paris Agreement temperature goals is out today in Nature Climate Change! 🌳 Read it here: www.nature.com/articles/s41558-025-02327-9

💰🌍 Research by Sarah Schöngart et al. shows the wealthiest 10% caused TWO-THIRDS of global warming since 1990. The top 1% have an even bigger impact on extreme weather like #heatwaves and #droughts, hitting vulnerable regions hardest. usys.ethz.ch/en/news-even...

🌍 SAVE THE DATE! Excited to announce that we'll be hosting the first-ever Climate Overshoot Conference at @iiasa.ac.at from Sep 30th - Oct 2nd, 2025. Thrilled to bring this critical conversation to Laxenburg/Vienna. 1/ iiasa.ac.at/events/sep-2...

„Tot sind wir erst, wenn man uns vergisst.“ (Ferhat Unvar) Wir klagen um Fatih Saraçoğlu, Ferhat Unvar, Gökhan Gültekin, Hamza Kurtović, Kaloyan Velkov, Mercedes Kierpacz, Said Nesar Hashemi, Sedat Gürbüz, Vili Viorel Păun.

More important than ever to celebrate @unesco.org International Day of Women and Girls in Science. Check out our recent paper on why it's important to understand how societies with more #WomenInScience create more innovative societies and help speed up socioeconomic progress: shorturl.at/6j0dY 👇🏽

Excellent thread on our new paper in Nature Climate Change on what a year above 1.5°C means for the Paris Agreements lower temperature target

Great coverage of our recent study on 2024 warming and the 1.5°C limit by @tinymaddie.bsky.social here: www.newscientist.com/article/2467... @bevacquae.bsky.social

In Nature Climate Change, we show that a year above 1.5 °C signals that Earth is most probably within the 20-year period that will reach the Paris Agreement limit. @natclimchange.bsky.social