Valérie Masson-Delmotte
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valmasdel.bsky.social
Valérie Masson-Delmotte
@valmasdel.bsky.social

PhD, climate scientist @lsce-ipsl.bsky.social @CEAParisSaclay @IPSL_outreach @hc_climat. Was co-chair @ipcc.bsky.social (AR6 WGI). Member of French Academy of Technology and Academy of Sciences.

Valerie Masson-Delmotte is a French climate scientist and Research Director at the French Alternative Energies and Atomic Energy Commission, where she works in the Climate and Environment Sciences Laboratory (LSCE). She uses data from past climates to test models of climate change, and has contributed to several IPCC reports. .. more

Environmental science 43%
Geology 27%
Eos @eos.org · 2d
Students applying for NSF funding are having their applications “returned without review” for being “ineligible,” despite their proposed research falling squarely within the application guidelines. eos.org/research-and...
Graduate Students’ NSF Fellowship Applications Are Being “Returned Without Review” - Eos
Graduate students applying for NSF funding have had their applications returned without review—even though their proposed research appears to fall squarely within the fields of study outlined in the p...
eos.org
I don't say this often but: I'm so proud to be a climate and environment reporter. We cover an issue that is vitally important to humanity and the natural world. 14 of my climate colleagues at the Post were laid off today and I'm devastated.

www.climatecoloredgoggles.com/p/washington...
Breaking: Washington Post gutting its climate team
Clean energy dies in darkness. Courtesy of Jeff Bezos.
www.climatecoloredgoggles.com
"It's like on the eve of WWII we decided to stop funding R&D into weapons systems to develop advanced aircraft, ships, and tanks. Climate change is going to kick our butts if we lose NCAR (and NOAA)" yaleclimateconnections.org/2026/01/the-...
The future of NCAR remains highly uncertain » Yale Climate Connections
Members of the American Meteorological Society were briefed Wednesday about ongoing developments on the future of the National Center for Atmospheric Research, which the White House has said it will b...
yaleclimateconnections.org

A federal judge on Friday ruled the Energy Department violated the law when Secretary Chris Wright handpicked five researchers who reject the scientific consensus on climate change to work in secret on a sweeping government report on global warming.
www.nytimes.com/2026/01/30/c...
A Secret Panel to Question Climate Science Was Unlawful, Judge Rules
www.nytimes.com
Recent assessments have found the last glacial maximum implies a climate sensitivity of 2.4C (1.4C to 5.0C): www.science.org/doi/...

And the Pliocene implies a sensitivity of 3.1C (2.3C to 4.7C): www.pnas.org/doi/10....

Paleoclimate evidence generally provides the strongest constraint on high ECS.
Article updates on the repeal of the endangerment finding for CO2. The administration is worried that their case is not strong enough to withstand legal challenges.

Gift link (courtesy of @donboesch.bsky.social): www.washingtonpost.com/climate-envi...
Trump’s biggest climate rollback stalls over fears it will lose in court
Trump officials have delayed finalizing the repeal of the agency’s “endangerment finding” over concerns the proposal is too weak to withstand a court challenge.
www.washingtonpost.com
🔥 Jan 2026: #CopernicusAtmosphere data show intense wildfires and emissions in Chile, Argentina and Australia, with impacts on air quality locally and long-range smoke transport across the Pacific.

Details: atmosphere.copernicus.eu/southern-hem...

qu'il entraîne dans une folle sarabande
voyelles et consonnes
virgules et points d'exclamation

Attends la fin de la tempête
pour relier l’oiseau à l’écriture
l'écriture à l'ombre
l'ombre à l'arbre
que tu secoueras très fort
ton poème tombera comme un fruit à tes pieds

Comment écrire un poème?

Invite un oiseau sur ta page
fais-le suivre de son ombre
d'un arbre
et de quelques feuilles mortes

Demande au vent assis dans la marge
de souffler entre les lignes
de droite à gauche
de gauche à droite
«Rendre la liberté académique plus solide…» Stéphanie Balme est l’invitée de notre émission « La grande conversation »
«Rendre la liberté académique plus solide…» Stéphanie Balme est l’invitée de notre émission « La grande conversation »
« Alerte rouge absolue »… Invitée de « La Grande Conversation », Stéphanie Balme (Sciences Po) évoque les menaces qui pèsent sur la liberté académique et propose des solutions pour la défendre et la promouvoir.
theconversation.com
Our statement on the U.S. administration’s attacks on biomedical research, public health & vaccination — undermining science and endangering lives.

The Institut Pasteur reaffirms its commitment to defending science, evidence, and global health.

www.pasteur.fr/en/press-are...

#PublicHealth
Institut Pasteur statement on U.S. administration's attacks against biomedical research, global public health action and vaccination
For several months now, the current U.S. administration has consistently attacked and endeavored to weaken biomedical research and public health action in the United States and worldwide with unparall...
www.pasteur.fr
Climate change increased snowfall and freezing rain during the January 2026 North American storm
🔗 www.climameter.org/20260124-25-...
comparable winter storms now occur in a warmer, moister atmosphere, leading to ~20% higher precipitation. Cold extremes are rarer, but snowfall impacts are stronger.
Join us in Bologna, Italy, 4–6 Nov 2026 for Visualising Climate — the first global conference fully dedicated to climate data visualization and its power to transform public understanding of a changing planet. Come see the data.
visualisingclimate.org
#VisualisingClimate2026 #DataVis #ClimateCrisis
New discussion paper just dropped that’s taken shall we say a little work to get this far … essd.copernicus.org/preprints/es... please be kind. Not on an at all sensitive topic in the slightest.
How well can we quantify when 1.5 °C of global warming has been exceeded?
Abstract. Parties to the 2015 Paris Agreement agreed to limit the long-term increase in global average temperature to well below 2 °C and pursue efforts to keep temperatures below 1.5 °C relative to p...
essd.copernicus.org
When it rains, it now rains more.

For those experiencing the flooding in south-west England, it is worth remembering that rainfall in winter has increased by about 25% overall.

And, the rainfall has also become more intense: when it rains, it now rains more, increasing the risk of flooding.

U.S. government has lost more than 10,000 STEM Ph.D.s since Trump took office | Science | AAAS www.science.org/content/arti...
U.S. government has lost more than 10,000 STEM Ph.D.s since Trump took office
A Science analysis reveals how many were fired, retired, or quit across 14 agencies
www.science.org
Selon une enquête du Guardian, ChatGPT serait "contaminé" par Grokipédia avec 9 requêtes sur 12 citant cette source complètement biaisée mise en place par EM pour concurrence @wikipedia.org .
ChatGPT devrait être interdit dans les institutions & entreprises.
www.theguardian.com/technology/2...
Latest ChatGPT model uses Elon Musk’s Grokipedia as source, tests reveal
Guardian found OpenAI’s platform cited Grokipedia on topics including Iran and Holocaust deniers
www.theguardian.com

www.lesechos.fr
Quand quelqu'un qui estime qu'il faut démanteler la démocratie vient partager ses idées dans le plus grand des secrets avec une institution au plus près du pouvoir politique en France, il se passe quoi exactement ?

Parlons de la visite de Peter Thiel à Paris.
1/15
La SMF ne tiendra pas de stand au Congrès International des Mathématiciens (ICM) de Philadelphie en 2026. (1/3)

(Motion du Conseil d'Administration du 16 janvier 2026)

smf.emath.fr/actualites-s...
ICM 2026 - motion du CA | Société Mathématique de France
La SMF ne tiendra pas de stand à l'ICM de Philadelphie.
smf.emath.fr
AGU and @ametsoc.org are collaborating to catalyze assessment science that advances U.S.-focused climate change research.🌎

🔗 Learn about the new "U.S. Climate Collection” and how to submit: buff.ly/Uo0pq1B

#AGUPubs #ClimateAction #ClimateChange #AMS2026

🐦 A vous de jouer !

Ici 2 mésanges bleues,
4 charbonnières,
6 chardonnerets,
4 pinsons des arbres,
1 étourneau,
2 tourterelles
et 4 perruches à collier

www.oiseauxdesjardins.fr/index.php?m_...
C'est fait : les États-Unis sortent de l'OMS.

Celle-ci "prend note des déclarations du gouvernement américain selon lesquelles elle l'aurait dénigré, insulté et compromis son indépendance" et réplique : "C'est tout l'inverse. L'OMS a toujours cherché à dialoguer de bonne foi."

Bon week-end!
NSF just posted their Dear Colleague Letter regarding the restructuring of NCAR. www.nsf.gov/funding/info...
NSF Intent to Restructure Critical Weather Infrastructure
www.nsf.gov
Your regular reminder that when folks say "its cold outside where I live, what happened to global warming?" that the world is big, and weather still exists.
Observing the situation around #Greenland, I have a strong sense of déjà vu - we’ve seen and heard this before. It reminds me of 2014 and Crimea.

Let's recall and compare.

▪️ Security and protection:

In 2014, Russia claimed that without Crimea, it was impossible to ensure the security of Russia⤵️