Direct air capture is not currently viable strategy. Likely increases carbon pollution (more carbon energy required to than saved). See @mzjacobson.bsky.social's work: news.stanford.edu/stories/2019... & Joe Romm's review for our center (@penncssm.bsky.social): bpb-us-w2.wpmucdn.com/web.sas.upen...

Au GIEC, une bataille très politique autour des dates de publication du prochain rapport d’évaluation. Pour la 4e fois en 2 ans, les pays n’ont pas réussi à s’accorder sur son calendrier. Certains pays veulent repousser sa parution pour amoindrir l’action climatique www.lemonde.fr/planete/arti...

How much CO₂ can the world emit while limiting global temperature rise?

Published today in Earth System Science Data: The Global Carbon Budget 2025 essd.copernicus.org/preprints/es...

How about massively reducing emissions first ? www.theguardian.com/environment/...

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🤝 À l’occasion de la COP21, près de 200 pays s’engageaient pour la 1ère fois à lutter collectivement contre le réchauffement climatique en votant l’Accord de Paris. 10 ans plus tard, lors de l'ouverture de la COP30 sur le climat à Belém, où en sommes-nous ? Le tour en 5 graphiques 👇

As part of the GCP-Regional Carbon Cycle Assessment and Processes-2, we recently published the Australasia's CH4 and N2O Budgets. The carbon budget was published in 2023, both papers, led by Yohanna Villalobos and a great team of collaborators. agupubs.onlinelibrary.wiley.com/doi/10.1029/...

The US is not expected to send high-level representatives to COP30, and many say that’s for the best. Whether humanity bends the emissions curve sufficiently to escape the most dangerous climate impacts now depends on the actions of other big players www.nature.com/articles/d41...

Une nouvelle étude pointe les faiblesses structurelles de la compensation carbone : bénéfices surestimés, risques de fuite et stockage seulement temporaire du CO₂. Ce système, censé lutter contre la déforestation, peine à prouver son efficacité réelle. Explications en GIF 🌳

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Definitely worth a read.

It is difficult to get a man to understand something when his salary depends upon his not understanding it. (Upton Sinclair) www.reuters.com/sustainabili...

To rehabilitate the general view of women's contributions to the history of science, the CNRS is part of a commission that aims to inscribe the names of 72 female scientists on the Eiffel Tower. 🗼 #WomenInScience

🌍 Un engagement ambitieux de l’Europe pour 2040 est indispensable pour maintenir vivants les objectifs de l’Accord de Paris. La position de la France fait peser un risque important sur l’adoption par l'UE d’objectifs à la mesure du défi climatique. ➡️ www.hautconseilclimat.fr/actualites/o...

A 0.7°C cooling at best from all geological carbon storage. So could 2.2°C be seen as the maximum allowed overshoot temperature ? 🤓

Great news study of the global ocean carbon sink response to the 2023 warming conditions

The @ametsoc.org responds to the the regime's Department of Energy #climate report: "We identify five foundational flaws in the [...] report. Each of these flaws, alone, places the report at odds with scientific principles and practices." www.ametsoc.org/ams/about-am...

Are you interested in biosphere-atmosphere interactions, global modeling, and living in Zurich? If so, this postdoc position might be for you! Please share with any interested colleagues: jobs.ethz.ch/job/view/JOP...

The #IPCC has announced the authors selected for its Seventh Assessment Report. 664 experts from 111 countries have been invited to participate as Coordinating Lead Authors, Lead Authors, & Review Editors. 🌍 51% from developing countries 🚺 46% women 🔗 bit.ly/AR7AuthorsPR

They should then suggest to remove the first A from NASA …

That phony EPA 'climate report'? The good folks at @carbonbrief.org fact-checked it. Take a look, and then file a comment with the EPA. interactive.carbonbrief.org/doe-factchec...

"A climate skeptic report commissioned by the Trump administration outrages the American scientific community” by @sfoucart.bsky.social for @lemonde.fr (en francais):

And this now, coming from the DOE 😰 www.energy.gov/sites/defaul...

It is CO2 radiative forcing that poses the largest end-of-century climate threat, because CO2 accumulates in the atmosphere. [C1-C4 are lower, and C5-C8 higher, IPCC temperature scenarios; ERF is effective radiative forcing.] Nice paper. gmd.copernicus.org/articles/15/... @kikstra.bsky.social

Excited to release today with Daniel Sitompul ICCT's first air and GHG inventory for private jets. A lot of eye opening statistics in this report. Let me walk you through a few. (🧵) theicct.org/publication/...

“the wedding of the century” 🙄 Definitely in terms of CO₂ emissions ! 😡

In @theguardian.com about geo engineering “If these ideas are otherwise harmless, and work, they might yet save us.”. No they won’t. The only “idea” that can save us is bringing greenhouse gases emissions to zero ! www.theguardian.com/environment/...

Résumé de la publication (aujourd’hui) sur les indicateurs de changement climatique. Pas bcp de bonnes nouvelles. 1.5C se rapproche inexorablement.

« La suite dépend des choix qui vont être faits, insiste la paléoclimatologue Valérie Masson Delmotte. Nous pouvons limiter l’ampleur du réchauffement à venir, et protéger les jeunes générations de l’intensification des événements extrêmes. » @valmasdel.bsky.social

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A huge thank you to everyone that joined us at the first day of the re-launch & 75th Anniversary of the journal #Tellus! 🫶 Brilliant presentations, and we are more than excited for what day two will bring tomorrow. 🌍 @scienceacademyswe.bsky.social @stockholm-uni.bsky.social

Here's the latest comparison of global surface temperature observations (red) with IPCC climate model simulations (through March 2025, via @hausfath.bsky.social):

just reposting this old tweet (from my dormant X account). threadreaderapp.com/thread/16617...

Great article about GISS being homeless 😢

The biomass antenna was deployed two weeks ago. In Jan 2026 the first open data is expected. The mission data will enhance the new Biomass V6 dataset, which was released as part of the ESA's Climate Change Initiative to support forest monitoring climate.esa.int/en/news-even...

The 7 billion tonne gap! Climate science & national emissions reporting use different definitions & methods to estimate anthropogenic land-based carbon removals. This is no small issue, but what can we do about it? www.nature.com/articles/s41... (sorry, shareable open link not yet published). 1/

What's at stake for the #KeelingCurve if NOAA gets dismantled. A take in @thebulletin.org from Ralph Keeling and Eric Morgan of @scrippsocean.bsky.social: thebulletin.org/2025/05/how-...

📢 Under review now : 2024 annual update of key indicators of the state of the climate system and human influence essd.copernicus.org/preprints/es...

Non-living carbon pools are key in carbon storage! ESA Climate Change Initiative's RECCAP study shows soil, sediments, and wetlands as major sinks, challenging the belief in forests' dominance. These findings offer crucial insights for future climate modelling. 🌿💧 climate.esa.int/en/news-even...

Folks in the Southhampton UK area, seats still available for Wednesday's #ScienceUnderSiege lecture @unisouthampton.bsky.social, based on my forthcoming book (via @publicaffairs1796.bsky.social & @scribepub.bsky.social) w/ the great @peterhotezmdphd.bsky.social

"Ocean acidification is a silver lining" is a bizarre story line. (In the meantime, coral reefs are already cooking due to global heating). www.science.org/content/arti...

Régulation sur les émissions d’aérosols soufrés par le transport maritime en vigueur depuis 2020, une nouvelle fois rejetée comme facteur discernable pour expliquer les températures records de 2023-2024. Buzz/influences lobbyistes nuisent aux sciences du climat 1/🧵 acp.copernicus.org/articles/25/...

In sum, binary climate data can break through climate apathy. Framing gradual changes as binary shifts—vanishing white Christmases, lakes no longer freezing—makes invisible threats visible while maintaining scientific accuracy. 6/n

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NEW 🧵 The number of people travelling from Europe to the US in recent weeks has plummeted by as much as 35%, as travellers have cancelled plans in response to Trump’s policies and rhetoric, and horror stories from the border. Story: www.ft.com/content/6dc1...

BREAKING from @science.org: The Trump admin is seeking to kill nearly all climate research at NOAA, its climate science agency. Its near-final budget proposal would end all NOAA research labs, academic institutes, and regional climate centers. And it wants to fully end the NOAA Research division.

Justification for funding cuts 😳 “Cooperative Institute for Modeling the Earth System I: This cooperative agreement promotes exaggerated and implausible climate threats, contributing to a phenomenon known as “climate anxiety,” which has increased significantly among America’s youth.”

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BREAKING: In a reversal, all NOAA Research sites will now remain online with "no interruption in service," according to the agency. NOAA had previously moved to cancel the research division's cloud services contract. Story for @bloomberg.com (free link): www.bloomberg.com/news/article...