Valérie Masson-Delmotte
LightNews LightNews
banner
valmasdel.bsky.social
Valérie Masson-Delmotte
@valmasdel.bsky.social
34K followers 4.8K following 9.1K posts

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.

Videos

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%
Posts Replies Media Videos

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 2d
Je pense au Polypore soufré

Reposted by Valerie M. Delmotte

us.theconversation.com
The Conversation U.S. @us.theconversation.com · 2d
When Americans insist "it can't happen here," they’re wrong. A sociologist who studies collective memory and identity examines how the U.S. forgot its own fascist movements and what that collective amnesia means today. buff.ly/9mzgR3S
America faced domestic fascists before and buried that history
Although thousands of Americans embraced fascist ideas during the interwar years, a new study examines why the US has had little appetite to remember that past.
buff.ly

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 2d
Bonne soirée !

Reposted by Valerie M. Delmotte, Sonia I. Seneviratne, Peter A. Stott , and 1 more

adamsobel.bsky.social
Adam Sobel @adamsobel.bsky.social · 4d
Some reflections after returning back from a conference at which I and 20,000 colleagues learned that the Trump administration intends to dismantle #NCAR. This outrage should not happen. deepconvection.substack.com/p/save-ncar
Save NCAR
Field notes from New Orleans, where I and 20,000 colleagues learned that Trump intends to destroy the National Center for Atmospheric Research.
deepconvection.substack.com

Reposted by Valerie M. Delmotte, Erle C. Ellis, John Fasullo , and 3 more

eos.org
Eos @eos.org · 7d
At an @agu.org Town Hall today, @ncar-ucar.bsky.social President Antonio Busalacchi spoke to #AGU25 attendees about what's at stake if NCAR is dismantled.

One attendee asked anyone who uses NCAR research to stand up. Almost everyone in the room stood.

Read more here:

eos.org/research-and...
In a large conference room full of people, the audience doesn't fit entirely in the frame of a photo. Nearly everyone pictured is standing.

Reposted by Joanna Bryson, Katharine Hayhoe, Valerie M. Delmotte , and 22 more

science.org
Science Magazine @science.org · 7d
Science has named the seemingly unstoppable growth of renewable energy worldwide as the 2025 Breakthrough of the Year.

Learn more about this year's #BOTY and other big advances in science: https://scim.ag/493Tpgx
Qianjiadong Reservoir in southern Hunan, China, produces a double harvest: solar energy and yellow carp. The solar farm produces up to 80 megawatts of power while the fish forage beneath the panels. With a massive scale-up of solar and wind at home and cheap exports of the technology, China is driving a worldwide surge of renewable energy—Science’s 2025 Breakthrough of the Year.

Reposted by Valerie M. Delmotte

gretchentg.bsky.social
Gretchen Goldman, PhD @gretchentg.bsky.social · 8d
And whether or not you are at #AGU25, you can join us in speaking out against moves by the Trump administration to dismantle @ncar-ucar.bsky.social, the premier weather and climate research center for the nation. secure.ucs.org/a/2025-prote...
Protect the National Center on Atmospheric Research
Write today and urge your members of Congress to oppose the Trump administration's plans to dismantle the National Center for Atmospheric Research (NCAR.) Your message to Congress will help protect NC...
secure.ucs.org

Reposted by Valerie M. Delmotte

glenpeters.bsky.social
Glen Peters @glenpeters.bsky.social · 9d
Policy works.

How do we know? Because emissions go up when the policy is removed (transport in this case).

[Noting, biofuels are allocated zero emissions in GHG emission reporting, on the assumption emissions are captured in LULUCF]

Reposted by Valerie M. Delmotte

petergleick.bsky.social
Peter Gleick @petergleick.bsky.social · 9d
If nothing is done to stop Trump and the GOP, in three more years there will be nothing left of this country.

www.usatoday.com/story/news/p...
Trump moves to dismantle major US climate research center in Colorado
The Trump administration is breaking up the National Center for Atmospheric Research, taking aim at one of the world's leading climate research labs.
www.usatoday.com

Reposted by Valerie M. Delmotte

handle.invalid
NOAA @handle.invalid · 9d
Today, the 2025 #ArcticReportCard was released, marking 20 years of tracking rapid Arctic warming and change.

Find the full 2025 Arctic Report Card, with images, facts and stats at:

arctic.noaa.gov/report-card/...

#AGU25
noaa.gov via NOAA Research
Report Card 2025 - NOAA Arctic
Arctic Report Card: Update for 2025 Twenty years of tracking rapid Arctic warming and change Archive of Previous Arctic Report Cards Arctic Report Card 2025 2025 Headlines and Overview Vital Signs Oth...
arctic.noaa.gov

Reposted by Valerie M. Delmotte, Ben Bond‐Lamberty, Andy Baker , and 5 more

alexwitze.bsky.social
Alexandra Witze @alexwitze.bsky.social · 9d
Attendance at US-based science conferences is bouncing around this year but generally down. #AGU25 has ~10k fewer this year! I explored these trends for @nature.com — including solutions to keep conferences local & productive:

www.nature.com/articles/d41...

🧪
Scientists skip key US meetings — and seize on smaller alternatives
Researchers are devising creative ways to get together as Trump’s policies curb travel to US gatherings.
www.nature.com

Reposted by Valerie M. Delmotte

cnrs.fr
CNRS @cnrs.fr · 10d
Le CNRS a proposé au Sénat des mesures fortes pour renforcer la place des femmes en science. Cette sous-représentation n’est pas une fatalité : elle résulte de biais, de stéréotypes, d’inégalités et de violences tout au long des parcours scolaires et professionnels.
Féminiser les sciences : comment réparer le « tuyau percé » | CNRS
À l’automne 2025, un rapport déposé au Sénat auquel le CNRS a contribué a proposé plusieurs mesures fortes pour attirer et consolider les effectifs féminins d
www.cnrs.fr

Reposted by Valerie M. Delmotte, Alan Richardson, Michael Zimmer , and 6 more

alondra.bsky.social
Alondra Nelson @alondra.bsky.social · 10d
🧵 NSF is reducing external review requirements and eliminating routine expert panels, citing staff shortages that this administration implemented. This change expands program officer authority. But the solution to flawed accountability isn't less public accountability.

Reposted by Wolfgang Crämer

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 11d
www.lemonde.fr/m-le-mag/art...
Aux Etats-Unis, les sciences du climat en voie d’extinction
Ouvertement climatosceptique, l’administration Trump sabre dans les fonds et les bourses destinés aux études et aux recherches environnementales. Sous pression de cette offensive, des étudiants et des...
www.lemonde.fr

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 12d
The U.S. Is Funding Fewer Grants in Every Area of Science and Medicine www.nytimes.com/interactive/...
The U.S. Is Funding Fewer Grants in Every Area of Science and Medicine
A quiet policy change means the government is making fewer bets on long-term science.
www.nytimes.com

Reposted by Valerie M. Delmotte, Peter Thorne, Jesse M. Shapiro , and 8 more

berglundoscar.bsky.social
Oscar Berglund @berglundoscar.bsky.social · 12d
We (@crossdale.bsky.social, Christina Pantazis, @roxana-pessoa.bsky.social, Tiê Franco Brotto and I) present the first academic peer-reviewed article, studying the criminalisation and repression of climate and environmental protest as a global phenomenon. www.tandfonline.com/doi/full/10....

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 13d
Je n ai pas accès au contenu de cet article...

Reposted by Valerie M. Delmotte

cea-paris-saclay.bsky.social
CEA Paris-Saclay @cea-paris-saclay.bsky.social · 13d
Dix ans après les Accords de Paris, Valérie Masson-Delmotte, paléoclimatologue au LSCE, revient dans une conférence en ligne sur les relations entre réchauffement climatique et les impacts sur notre corps et notre système de santé.

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 15d
Aujourd'hui et demain nous fêtons les 30 ans de l'Institut Pierre-Simon Laplace! www.ipsl.fr/30-ans/
30 ANS – Institut Pierre-Simon Laplace
www.ipsl.fr

Reposted by Katharine Hayhoe, Valerie M. Delmotte, Sonia I. Seneviratne , and 3 more

frediotto.bsky.social
Prof Friederike Otto @frediotto.bsky.social · 15d
In the world we live in today, that is 1.3C warmer due to our continued burning of fossil fuels, the extreme rainfall leading to disastrous flooding in many parts of Asia is up to 50 to 160% more intense - new @wwattribution.bsky.social study www.worldweatherattribution.org/increasing-h...
map of Sri Lanka with heavy rainfall map of Sumatra and Malaysia showing heavy rainfall between November 23rd and 27th

Reposted by Valerie M. Delmotte

francoisjobard.bsky.social
Francois Jobard @francoisjobard.bsky.social · 15d
🌡4 jours d'affilée avec température maximale > 14 °C en décembre à #Paris, du jamais vu depuis l'ouverture de la station historique du Parc Montsouris en 1873.

Reposted by Wolfgang Crämer

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 16d
bbc.com/news/article...
UN environment report 'hijacked' over fossil fuels - top scientist
The US and other governments derailed an agreement on a global environment study, its co-chair says.
bbc.com

Reposted by Wolfgang Crämer

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 16d
www.lemonde.fr/planete/arti...
Environnement : la publication des conclusions d’un rapport phare de l’ONU bloquée par quelques pays, dont les Etats-Unis
Une poignée de pays, dont les Etats-Unis, l’Arabie saoudite et l’Iran, se sont opposés à l’adoption du « résumé à l’intention des décideurs » d’une vaste synthèse onusienne, en raison de mentions sur ...
www.lemonde.fr

Reposted by Wolfgang Crämer

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 17d
The Guardian view on solar geoengineering: Africa has a point about this risky technology | Editorial www.theguardian.com/commentisfre...
The Guardian view on solar geoengineering: Africa has a point about this risky technology | Editorial
Editorial: Sun-dimming risks putting the planet’s thermostat under Donald Trump’s control. Better to adopt the precautionary principle with high-stakes science
www.theguardian.com

Reposted by Wolfgang Crämer

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 17d
Understanding the large-scale climate drivers of Sargassum blooms

www.nature.com/articles/s41...
Equatorial upwelling of phosphorus drives Atlantic N2 fixation and Sargassum blooms - Nature Geoscience
High near-surface nitrogen-fixation rates that promoted the recent growth of the Great Atlantic Sargassum Belt were tied to greater upwelling of phosphorus from the equatorial Atlantic, according to c...
www.nature.com

Reposted by Valerie M. Delmotte, Sonia I. Seneviratne, Du Toit , and 2 more

oceanterra.org
Sam Burgess @oceanterra.org · 17d
The latest #climate update from Copernicus shows that 2025 is on course to be:

- joint 2nd warmest year, tied with 2023 and behind 2024 (warmest year)

- November 2025 was the 3rd warmest November globally

For more: climate.copernicus.eu/copernicus-2...

🌏🌡️⚒️🧪🌊
Annual global surface air temperature anomalies (°C) relative to the 1850–1900 pre-industrial reference from 1967 to 2025. The value for 2025 is based on data for January to November. Data source: ERA5. Credit: C3S/ECMWF. Monthly global surface air temperature anomalies (°C) relative to the 1850–1900 pre-industrial reference period from January 1940 to November 2025, plotted as time series for each year. The year 2025 as well as the two warmest calendar years are shown in colour: 2025 in dark red, 2024 in orange, and 2023 in yellow. All other years are shown with thin grey lines. Data source: ERA5. Credit: C3S /ECMWF.

Reposted by Valerie M. Delmotte, Wolfgang Crämer

simondonner.bsky.social
Simon Donner @simondonner.bsky.social · 17d
I spoke about the decision to resign from chairing the Net-Zero Advisory Body with As it Happens (9:20 mark of the show). This is the best description of what transpired, including how the Alberta-Canada MOU was cynical, and why I felt I had no choice but to resign.
www.cbc.ca/listen/live-...
As It Happens with Nil Köksal, Chris Howden | Live Radio | CBC Listen
News that’s not afraid of fun. Meet people at the centre of the day’s most hard-hitting, hilarious and heartbreaking stories — powerful leaders, proud eccentrics and ordinary people in extraordinary c...
www.cbc.ca

valmasdel.bsky.social
Valérie Masson-Delmotte @valmasdel.bsky.social · 17d
C'est maintenant et nous pouvons répondre à vos questions en ligne
cea.fr CEA @cea.fr · 17d
Conférence🎥| H-3 ! 🚨

Ce soir à 19h, ne manquez pas Valérie Masson-Delmotte et Roger Legrand en live sur notre chaîne YouTube pour la conférence "Santé & climat : ça chauffe !"

Au programme : 🦟🪆🪭

Intriguant non ? Nos experts vous explique tout 👉 youtu.be/F-Hx1dotWs8

Reposted by Valerie M. Delmotte

cea.fr
CEA @cea.fr · 17d
Conférence🎥| H-3 ! 🚨

Ce soir à 19h, ne manquez pas Valérie Masson-Delmotte et Roger Legrand en live sur notre chaîne YouTube pour la conférence "Santé & climat : ça chauffe !"

Au programme : 🦟🪆🪭

Intriguant non ? Nos experts vous explique tout 👉 youtu.be/F-Hx1dotWs8

Reposted by Valerie M. Delmotte, Christian Odendahl, A. E. Dessler , and 1 more

hausfath.bsky.social
Zeke Hausfather @hausfath.bsky.social · 19d
I have a new update to climate model-observation comparisons over at The Climate Brink, covering CMIP3, CMIP5, and CMIP6. Models perform well globally. The latest generation shows too much long-term warming but better reproduces recent trends: www.theclimatebrink....