Clément Jaffrelo

Using a 20-year period to compare methane the CO2 is a terrible idea. It heavily discounts the future and locks in greater warming. New York should move away from it, and instead set separate targets for CO2 and short-lived climate pollutants:

#UnJourUnePhoto #Photocember #Photography #Photographie 4. Plat Le lac de Grand Lieu en Loire Atlantique. L'endroit le plus plat du département le moins haut de France.

Every ton of CO2 matters : @climatenerilie.bsky.social quantifies the climatic impacts of one large fossil fuel project and its implications for further human heat exposure or coral reef loss, and how committed emissions challenge climate pledges www.nature.com/articles/s44...

Dr. Jane Goodall filmed an interview with Netflix in March 2025 that she understood would only be released after her death.

NEW STUDY: How much CO2 can we safely store in geological formations? In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors. We find a prudent geological CO2 storage limit that is about 10x smaller. /1

Our comment on the DOE CWG report is done. It tips the scales at 439 pages, approx. 3x longer than the DOE report. This is related to Brandolini's law: The amount of energy needed to refute bullshit is an order of magnitude bigger than that needed to produce it. Example: refuting one sentence.

🌡️ Rares voire rarissimes en France au XXe siècle, les températures dépassant localement les 40 degrés sont devenues fréquentes depuis l’an 2000. Voici une carte animée localisant chaque année où les stations de Météo-France ont relevé ou dépassé 40 degrés (données au 17 août).

Qui aurait pu prédire que les VL hydrogène étaient un mauvais investissement ? Tout le monde sauf Bercy visiblement. 🙄 www.lalettre.fr/fr/politique...

⚫️ La Direction de l’AFP partage l’angoisse exprimée par la SDJ quant à la situation effroyable de ses collaborateurs dans la bande de Gaza ⬇️

The more we discover, the worse it gets. Now we learn the water companies wrote the guidance ensuring sewage sludge is not tested for the vast majority of contaminants before being spread on farmland. They gave themselves a free licence to dump hazardous waste. 🧵 www.theguardian.com/environment/...

The second is that the NWS historically has done a very good job at that forecast contextualization (outreach to local governments, emergency managers, outdoor recreation facilities, etc.). But that's one of the first things to go away when offices are critically understaffed.

There have been claims that NOAA/NWS did not foresee catastrophic TX floods--but that's simply not true. This was undoubtedly an extreme event, but messaging rapidly escalated beginning ~12 hrs prior. Flood Watch mid PM, "heads up" outlook late PM, flash flood warnings ~1am.

Our final updates have been posted to the Climate.gov website, and this will be our final post to our social media channels.

Host: Are you saying the US did not see intelligence that the Supreme Leader had ordered weaponization? Rubio: That’s irrelevant Host: No, that's a key point Rubio: No it’s not… Forget about intelligence

Après plus de dix ans de dénégations de Rachida Dati auprès des journalistes, des juges d’instruction et du Parlement européen qui avait ouvert une enquête interne, Complément d’enquête et Le Nouvel Obs révèlent des documents comptables attestant de liens entre Rachida Dati et GDF Suez

200+ scientists are in the middle of a marathon livestream to show why weather and climate science is so important and needs all our help to continue. It is here: wclivestream.com/watch

before and after today’s glacier collapse that buried 90% of blatten, switzerland

At least 27 are dead in Missouri in Kentucky after severe weather alerts were delayed overnight because of DOGE cuts. www.mesoscalenews.com/p/tornado-wa...

I will forever be haunted by this footage. Trawling has only been filmed underwater a few times in documentary history, and never with such clarity. What’s so heart-rending about these shots is watching how the animals don’t just get swept up — they swim for their lives. 🌎🦑🧪

Nouvelle vidéo de @amideslobbies.bsky.social #28 sur l'OFB. 🤠🍃 7 min pour comprendre les racines de la polémique avec une bonne dose d'humour youtu.be/LXVuUx3S_20?...

With the first four months of the year now available, I estimate that 2025 is most likely to be the second warmest year on record at 1.52C in ERA5, with a ~8% chance of beating 2024 as the warmest and a ~25% chance of coming in at the third warmest after 2023:

"The skull-cup, fashioned from a sawn-off and polished braincase adorned with a silver rim and stand, was used regularly at formal dinners at Worcester College, Oxford, until 2015" 😐

Dismantling the US Global Change Research Program is, alas, no surprise. USGCRP and the National Climate Assessment have long been on the radar for the Trumpists. But they don’t want to eliminate it. They want to use it for their own ends. [1/11] www.politico.com/news/2025/04...

We do need to adapt to climate change but it's going to be an absolute nightmare. I wrote about it here: www.theclimatebrink.com/p/adaptation...

The FBI is now moving to criminalize groups like Habitat for Humanity for “conspiracy to defraud the United States.” This comes after EPA Director Lee Zeldin eliminated the EPA headquarters in D.C. and 10 other regional offices.

#StandUpForScience Rassemblement et echanged devant le collège de France, le mouvement continue @sufs-paris-rp.bsky.social

À venir : création d'un Haut Commissariat au recyclage pour gérer toutes les reconversions d'anciens ministres échoués. 🗑♻️

🔴 Le tribunal administratif de Toulouse annule l’autorisation environnementale de l’A69 et ordonne l’arrêt immédiat du chantier. C’est la 1ère fois que la justice annule une infrastructure routière de cette ampleur. Une «victoire historique pour le droit de l’environnement» selon ses opposants.

Trump: "The European Union was formed in order to screw the United States, that's the purpose of it. And they've done a good job of it. But now I'm president."

A remarkable statement: Jeff Bezos decrees that henceforth, the Washington Post opinion pages will serve the rightwing political project. Probably self-evident to many people, but I think it’s worth unpacking why that is explicitly and unequivocally what this statement means:

I receive numerous requests from journalists regarding the current situation with the Intergovernemental Panel on Climate Change. I am not involved in the work of the IPCC for the 7th Assessment Cycle (AR7). 1/...

Qui aurait pu prédire ... que les taxis volants étaient une idée absurde ? 🤫 www.bfmtv.com/economie/ent...

Le président du Front Patronal :

🔴 Un contributeur bénévole expérimenté de #Wikipédia a fait l'objet samedi de menaces directes de la part d'Erwan Seznec, journaliste à @lepoint.fr, pour avoir modifié l'article Wikipédia consacré au journal. Ces pressions à l'égard de bénévoles sont extrêmement graves et totalement inadmissibles.

Mortes pour la plupart à domicile, du fait de leur conjoint. Mortes pour la plupart dans nos campagnes. Mortes parce qu'elles étaient des femmes. 1036 femmes tuées depuis l'élection du président de la République. On n'oublie pas. @noustoutesorg.bsky.social

The Biden administration blocked ExIm Bank funding for a controversial $20 billion LNG project in Mozambique despite a direct appeal from France’s TotalEnergies. The new Trump administration is once again reviewing the deal — cause for concern among human rights advocates. on.ft.com/42vE8nb

L’Humanité du 27 janvier. Numéro spécial : il y a 80 ans, la libération d'Auschwitz-Birkenau. 📰 humanite.fr

So it begins. 👹

I have a new paper in Dialogues on Climate Change exploring climate outcomes under current policies. I find that we are likely headed toward 2.7C by 2100 (with uncertainties from 1.9C to 3.7C), and that high end emissions scenarios have become much less likely. journals.sagepub.com...

Here's my visual explanation of why we have not yet reached 1.5°C even though 2024 was likely warmer than 1.5°C. 2024 shows us how close we are, but the underlying warming is still under 1.5°C.

#Fallout lore meets reality: the US annexation of Canada. fallout.fandom.com/wiki/United_...

C’est évidemment le jour J pour poster ce remarquable éclair de lucidité/CSC rarement égalé

⚖️ La société Indigo Park est déboutée en appel face à la mairie de Paris. #automobile #concession Indigo Park demandait 11,5M€ de dédommagements pour "des mesures imprévisibles en matière de circulation automobile" ayant affecté les parkings qu'elle gère. 📉🚗 www.legifrance.gouv.fr/juri/id/CETA...

Démission de la dessinatrixe Ann Telnaes (Pulitzer 2001) après la censure d'un de ses dessins par le Washington Post. Le dessin représentait Jeff Bezos, propriétaire du journal, avec d'autres acteurs de la tech et de la presse, prosternés devant Trump. Democracy dies in darkness.