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Nico Jourdain

@nicojourdain.bsky.social
134 followers 254 following 14 posts

CNRS researcher at IGE, Grenoble, France, working on the Antarctic Ice Sheet and its interactions with the climate system, sea level rise.

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Reposted by Nico Jourdain
Gaétan Heymes @gaetanheymes.bsky.social · 02/10/2026
Les glaciers des Alpes Suisses ont perdu 20% de leur volume en 5 ans, 2026 est la deuxième pire année juste après 2022. Ce bilan effrayant est à relier avec la succession d'étés caniculaires qui aggravent l'ablation estivale. Rapport complet disponible ici doi.glamos.ch/pubs/annualr...
Évolution du bilan de masse annuel des glaciers suisses depuis 2000.
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Matt King @deformedearth.bsky.social · 30/09/2026
Read about this in French theconversation.com/il-y-a-urgen...
theconversation.com
Il y a urgence à surveiller le glacier Wilkes, ce mastodonte de l’Antarctique qui risque de fondre
Si toute la glace du bassin de Wilkes fondait, le niveau de la mer sur Terre monterait de 3 à 4 mètres. C’est déjà arrivé par le passé, à des températures que nous risquons d’atteindre.
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Zeke Hausfather @zekehausfather.com · 28/09/2026
Check out my full analysis of expected impacts of the 2026-27 El Niño over at The Climate Brink:
theclimatebrink.com
The impacts of this year’s record-shattering El Niño
El Niño will drive severe drought from Indonesia to the Southern Africa and northern South America, with wetter winters from the US Gulf Coast to Southern South America.
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Tim Osborn @timosbornclim.bsky.social · 24/09/2026
I’ve updated the long-running (starts 1866) CRU Southern Oscillation Index (SOI). This lets us compare the currently developing El Niño with earlier events including 1877-78. 2026 has developed very quickly, similar to the 1997-98 one. Thick line is 3-month running mean, with y-axis reversed.
1866-present timeseries of Climatic Research Unit SOI with some major El Niño events marked.
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Le Gorafi @legorafi.bsky.social · 23/09/2026
Pluralisme – Le CNRS va accueillir des scientifiques platistes www.legorafi.fr/2026/09/23/pluralis…
legorafi.fr
Pluralisme – Le CNRS va accueillir des scientifiques platistes
Afin de respecter toutes les sensibilités, le CNRS va prochainement ouvrir son champ d'enseignement et d'études scientifiques au platisme.
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US CLIVAR @usclivar.bsky.social · 21/09/2026
If you are planning to analyze CMIP7 Assessment Fast Track simulations, register to attend a CMIP7 Analysis Workshop! Each virtual workshop will focus on a fundamental CMIP7 science question. Learn more and register. wcrp-cmip.org/registration...
wcrp-cmip.org
Registration Open for CMIP7 Analysis Workshops - Coupled Model Intercomparison Project
We are pleased to invite the climate modelling community to participate in the CMIP7 Analysis Workshops, a new series of community-led virtual workshops
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Ruth Mottram @ruthmottram.eurosky.social · 17/09/2026
New piece on the blog on the new #IMBIE paper. How healthy are the ice sheets? What is driving their mass change and what do we know now after a half a century of observations by satellites? #iceSheets #SeaLevelRise #ClimateChange #ClimateImpacts #EO #SatelliteData
sternaparadisaea.net
Half a century of ice loss: the new IMBIE dataset
A big new community paper has just landed: the IMBIE paper is a big effort to assess the long term health of the ice sheets. What did we find and what does it mean?
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John Kennedy @micefearboggis.bsky.social · 09/09/2026
Brilliant blog post from @ruthmottram.eurosky.social. It's got science galore in all its wonderful messy surprising glory. Also it's one of the few posts you will read that will give you your recommended daily allowance of the word mélange. sternaparadisaea.net/2026/09/09/a...
sternaparadisaea.net
A jumble of broken ice, and what it means for Greenland’s calving glaciers.
Ice mélange — sometimes known as sikussaq in Greenlandic — is that chaotic jumble of icebergs, bergy bits and sea water that sits in front of marine-terminating glaciers. It’s been described …
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Christophe Cassou @cassouman40.bsky.social · 08/09/2026
2026 n’arrive pas plus tôt qu’envisagé! L’analyse👇 à partir d'un grd ensemble de simulations montre qu’un été type 2026, certes extrême, est bien présent dans la gamme des étés possibles attendus pour cette décennie 2020-2029. L’impréparation est un choix politique, pas une défaillance scientifique.
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Melaine Le Roy @subfossilguy.bsky.social · 04/09/2026
The Alps are no longer white 🏔️🧊 And it's entirely our fault! 🏭🔥 Spectacular retreat of the Corvatsch Glacier on Piz Murtel (3,433 m asl, Engadin, CH) over the last 57 years compiled by @landervt.bsky.social !
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Alex Robel @iceclimate.bsky.social · 02/09/2026
The California coast is about to be a time machine to what every day in 2060 will look like
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IRD @ird-fr.bsky.social · 02/09/2026
Julien Pompon, entomologiste moléculaire à l'IRD, détaille sur @franceinfo.fr les travaux sur le développement d'un vaccin qui cible la salive de moustique. Une étude menée par l’IRD, le @cnrs.fr, l'@umontpellier.bsky.social et l’Université de Mahidol (Thaïlande), publiée dans @nature.com.
franceinfo.fr
Une piste prometteuse pour développer un vaccin contre les virus transmis par les moustiques
Des chercheurs français ont mis en évidence le mécanisme par lequel la salive des moustiques favorise la transmission de virus comme la dengue, le Zika ou la fièvre jaune. Ces travaux ouvrent la voie ...
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Xylar Asay-Davis @xylarstorm.bsky.social · 30/08/2026
wordie -- guess the Antarctic Ice Shelf xylar.github.io/wordie/ I made a game inspired by worldl.io that might appeal to Antarctic researchers and probably no one else.
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Le Monde @lemonde.fr · 27/08/2026
Inondations au Népal et au Tibet : « L’origine du drame est un glissement de terrain qui a entraîné avec lui un glacier »
lemonde.fr
Inondations au Népal et au Tibet : « L’origine du drame est un glissement de terrain qui a entraîné avec lui un glacier »
Si les volumes de roches et de glace qui se sont décrochés dans l’Himalaya n’ont pas encore été quantifiés, le glaciologue Adrien Gilbert estime déjà, dans un entretien au « Monde », que cette catastrophe est d’une ampleur exceptionnelle.
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Dr Dan Shugar 🇨🇦 @watershedlab.bsky.social · 26/08/2026
The source of the flood in Nepal is a collapsed glacier 🧪⚒️
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Zeke Hausfather @zekehausfather.com · 11/08/2026
Non-hydro renewables (primarily wind and solar) are on track to pass gas this year as the second largest source of electricity generation globally. The rapid over the past 10 years is pretty remarkable! Hat tip to Michael Liebreich for the plot idea.
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Zack Labe @zacklabe.com · 10/08/2026
We have very unfortunate news to share today... 😢 I've been an author for this report since 2020, and we just celebrated our 20th anniversary edition last year.
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Zeke Hausfather @zekehausfather.com · 09/08/2026
The August NMME runs are now in (though CFSv2 and CanSIPS have already been updated), and continue the trend of each month showing yet-higher model forecasts of an unprecedented El Nino by the end of the year:
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Willem Huiskamp @willemh.bsky.social · 30/07/2026
🚨 New paper 🚨 from one of our awesome students 🌊 We ask: if the AMOC shuts down, does Antarctica feel the impact via the ocean? Using a coupled climate and ice sheet model we come to the conclusion: not much, actually 😅 (with caveats, of course) esd.copernicus.org/articles/17/...
esd.copernicus.org
Simulating the impact of an AMOC weakening on the Antarctic Ice Sheet using a coupled climate and ice-sheet model
Abstract. Climate model studies show that a shutdown of the Atlantic Meridional Overturning Circulation (AMOC) reduces northward heat transport into the North Atlantic, which causes an accumulation of...
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Mathieu Morlighem @mathieu-ice.bsky.social · 29/07/2026
Turns out not knowing what's under the ice can matter as much as not knowing future emissions. Nice piece on Hélène's latest work! www.sciencenews.dk/en/the-conti...
sciencenews.dk
The continent beneath Antarctica could reshape sea-level forecasts
Scientists have discovered that uncertainty about the landscape beneath Antarctica’s kilometre-thick ice sheet can influence future sea-level forecasts just as much as the difference between...
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Nico Jourdain @nicojourdain.bsky.social · 18/07/2026
La trop brève histoire de Marion-Dufresne et des Maoris www.radiofrance.fr/francecultur...
radiofrance.fr
"La Trop Brève Histoire de Marion-Dufresne et des Maoris, 9 mai – 13 juillet 1772" de Delphine Morel : un podcast à écouter en ligne
Cette série évoque l’histoire d’un monde inconnu, celui des Maoris. Leur terre, la Nouvelle-Zélande, est l’une des terres les plus reculées du Pacifique, à plusieurs milliers de kilomètres de toute au...
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Dr. Twila Moon @drtwilamoon.bsky.social · 16/07/2026
Let's test it! Macneill et al. use focus groups to test interpretation, meaning, emotion. And provide recommendations! 🙌 ▶️ Use emotional content carefully. Provide context. ▶️ Bring clarity, not oversimplification. #Climate #ClimateComms #TippingPoints egusphere.copernicus.org/preprints/20...
egusphere.copernicus.org
An Up-HILL Battle: Towards clearer terminology for High-Impact Climate Possibilities, including tipping points
Abstract. Climate science terminology increasingly shapes public and policy discussion, yet shared understanding of commonly used terms is often assumed. This study examines how people make sense of l...
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Dr. Twila Moon @drtwilamoon.bsky.social · 16/07/2026
1/ 'tipping point', 'threshold' or...? This perspective from @bobkopp.net et al. raised important points about how 'tipping point' framing can mislead: 🤔 How fast? What does irreversible mean? 🤔 If we stabilize temperature will everything go back to "normal"? www.nature.com/articles/s41...
nature.com
‘Tipping points’ confuse and can distract from urgent climate action - Nature Climate Change
The tipping points framing is widely used in climate discussions but receives mixed feedback. This Perspective critiques it for oversimplifying the complexities of natural and social systems and faili...
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IPCC @ipcc.bsky.social · 10/07/2026
📣 Registration is now open for experts to review the First Order Draft of the Working Group I contribution to IPCC’s Seventh Assessment Report. Interested experts can register until 25 Sept 2026 👉https://bit.ly/4vi25cq The review starts 10 August until 2 October. Read more 👉 bit.ly/WGI7Fod
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CNRS @cnrs.fr · 07/07/2026
Le cas Anthropic a agi comme un électrochoc. 💻 La dépendance aux outils numériques extra-européens n'est plus une hypothèse : c'est un enjeu stratégique. Au CNRS, plusieurs applications clés basculent vers des solutions plus souveraines. 🇪🇺⚠️
cnrs.fr
Le CNRS accélère sa transition vers la souveraineté numérique
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Zack Labe @zacklabe.com · 06/07/2026
El Niño continues to grow, with sea surface temperatures clearly at record high levels for the time of year... 📈 Sign up for our next monthly briefing to learn more, including Q/A: climatecentral-org.zoom.us/webinar/regi.... We'll also have an update on 2026's U.S. billion-dollar disasters so far.
Line graph time series of daily Nino 3.4 sea surface temperatures from 1982 to 2026. This year is currently a record high for this time of year. Data is from NOAA OISSTv2.1, and the graphic is created by Climate Central.
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Zeke Hausfather @zekehausfather.com · 06/07/2026
The global surface temperature record is one of the most iconic figures in climate science. We now have 12 different groups of researchers from the US, UK, EU, Japan, and China (among others) that have calculated it and found nearly identical results:
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Melaine Le Roy @subfossilguy.bsky.social · 01/07/2026
Drainage of subglacial water pockets around Refuge des Grands Mulets (3,051 m asl) on 27th June! 🧊🔥🌊 📽️ Via Mathieu Tisne
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Alex Robel @iceclimate.bsky.social · 18/06/2026
Our new perspective @nature.com led by @fsmccormack.bsky.social with @fpattyn.bsky.social @mathieu-ice.bsky.social Helene Seroussi 🧵👇 www.nature.com/articles/s41...
nature.com
Emergent decadal predictability in Antarctic contribution to sea-level rise - Nature
Although Antarctic ice loss projections diverge widely by 2100, this Perspective shows that present-day rates robustly predict mid-century sea level rise, providing a firm basis for near-term planning...
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Gonéri Le Cozannet @goneri76.bsky.social · 20/06/2026
Dans le climat actuel, 1976 serait un été frais. Une clarification salutaire de France Télévisions sur la base de données analysées par Julien Cattiaux et Christophe Cassou du CNRS.
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Zeke Hausfather @zekehausfather.com · 11/06/2026
I've added a folder to the github repository that contains regularly updating assessments of predictions vs observations across different variables:
github.com
climate-dashboard/forecast_skill at main · hausfath/climate-dashboard
Interactive global temperature dashboard using ERA5 data with ML-powered projections - hausfath/climate-dashboard
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Kate Aronoff @katearonoff.bsky.social · 26/05/2026
I went deep on RCP8.5, and how a climate scenario that's well over a decade old became the subject of a ridiculously bad-faith culture war newrepublic.com/article/2108...
newrepublic.com
Trump Twisted a Climate Debate Beyond Recognition
​Researchers concluded that one future climate scenario is unlikely to happen. Right-wingers went wild.
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Jano Gibson @southernsky.bsky.social · 23/05/2026
Antarctic station discovers its shipping containers floating away on iceberg after blizzard www.abc.net.au/news/2026-05...
abc.net.au
These aren't ants but shipping containers escaping on a massive breakaway iceberg
Details of how the shipping containers ended up on a giant iceberg have been revealed in one of the more unusual reports tabled at the annual meeting of Antarctic Treaty nations.
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Australian Antarctic Program Partnership @antarctic.bsky.social · 21/05/2026
"Climate risk information is only as reliable as the modelling infrastructure that underpins it. Neglecting Australian #climate modelling capability would be like continuing to use GPS after deciding to stop maintaining the satellites that make it work." 📝 www.scimex.org/newsfeed/ope...
scimex.org
Open letter to Federal Ministers about impacts of CSIRO job cuts
Open letter to Federal Ministers about impacts of CSIRO job cuts Proposed CSIRO job cuts threaten to cripple Australia’s climate modelling capability The Hon. Chris Bowen MP, Mi
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Christophe Cassou @cassouman40.bsky.social · 13/05/2026
Le saut de température en 2023 a suscité de multiples spéculations/emballements médiatiques sans avoir le recul sur les processus phys. à l’œuvre. Ce n'est pas 2023 qui était folle dans un climat qui chauffe mais 2022 qui était "trop" froide. Pourquoi? Notre étude publiée👇 doi.org/10.1038/s432...
doi.org
Physical understanding of the extreme global temperature jump in 2023 - Communications Earth & Environment
The 2023 El Niño developed atop a La Niña–like background, which resulted in an extreme jump in boreal fall temperature by amplifying sea surface temperature and sustaining precipitation over the West...
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CNRS Terre & Univers @cnrs-insu.bsky.social · 13/04/2026
#RésultatScientifique Pourquoi la relation entre les isotopes de l’eau dans les carottes de glace et la température varie-t-elle en Antarctique ? Une nouvelle réponse est apportée à cette question majeure pour la reconstitution des climats passés. ↩️ www.insu.cnrs.fr/fr/cnrsinfo/...
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Rob Larter @polarrobs.bsky.social · 24/03/2026
Some excellent news. Revolutionary Submarine Mysteriously Disappears Without a Trace – Scientists Are Now Preparing for a Bold Return share.google/KEwLHoDdEihD...
share.google
Revolutionary Submarine Mysteriously Disappears Without a Trace – Scientists Are Now Preparing for a Bold Return
A pioneering robotic submarine that explored beneath Antarctica’s glaciers has been lost, but its discoveries are reshaping our understanding of ice melt as a more advanced successor is prepared to co...
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Communications Earth & Environment @commsearth.nature.com · 20/03/2026
The recent increase in Antarctic Ice Sheet is driven by enhanced precipitation from frequent atmospheric rivers, stronger westerlies, and reduced sea ice, which together offset ice loss from outlet glacier discharge. @marlenkolbe.bsky.social @ruthmottram.bsky.social www.nature.com/articles/s43...
nature.com
Atmospheric rivers and winter sea ice drive recent reversal in Antarctic ice mass loss - Communications Earth & Environment
The recent increase in Antarctic Ice Sheet mass is driven by enhanced precipitation from frequent atmospheric rivers, stronger westerlies, and reduced sea ice, which together offset ice loss from outl...
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European Geosciences Union (EGU) @egu.eu · 10/03/2026
This year, we celebrate 25 years of interactive #OpenAccess #publishing, with 20 interactive open access journals, more than 50,000 high-quality peer reviewed #scientific articles published, and 250,000 interactive comments and replies from the scientific community! 🧵Read more: egu.eu/3Z82VX
Image description: orange buttons with "Open Access"  text. Text reads: ''25 years of interactive open access publishing: An interview with current and former EGU Publications Committee chairs Barbara Ervens and Ulrich Pöschl''. Read Now.
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Melaine Le Roy @subfossilguy.bsky.social · 03/03/2026
Mer de Glace from Signal Forbes 1890 | 2013 | 2021 | 2024 Strong acceleration of the demise of the largest French glacier over last few years! 🧊🔥
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CNFRAA @cnfraa.bsky.social · 18/02/2026
🎉Nos 22es Journées scientifiques auront lieu à Besançon du 27 au 29 avril 2026 en collaboration avec le laboratoire Chrono-environnement. La thématique : « Mondes polaires, mondes vulnérables? » Les inscriptions sont ouvertes ! Inscription gratuite mais obligatoire. ▶️ js22cnfraa.sciencesconf.org
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International Glaciological Society @igsoc.bsky.social · 23/02/2026
The 2nd Circular for the International Symposium on Interactions of Ice Sheets and Glaciers with the Ocean is now online! Info on scientific topical areas, networking events, registration, & more. www.igsoc.org/2nd-circular... @igs-egg.bsky.social @scrippsocean.bsky.social @helen-amanda.bsky.social
igsoc.org
2nd Circular for IGS Ice-Ocean Symposium Now Online | IGS
The Second Circular for the International Symposium on Interactions of Ice Sheets and Glaciers with the Ocean is now online. It has information on
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Mathilde Larrère @mathildelarrere.bsky.social · 21/02/2026
Ils étaient "20 et 3 étrangers et nos frères pourtant" C'est aujourd'hui le triste anniversaire de l'exécution de 23 résistants, 23 antifascistes. Honneur au groupe Manouchian. Honneur à celle et ceux qui ont combattu les nazis, nazis dont on laisse les héritiers défiler aujourd'hui à Lyon
image composée à partir d'une photo des fusillés du 21 février 1944
seuls les visages de 4 des résistants (photo prise après leur arrestation) ont été détourés et placés sur un fond rouge.
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Bethan Davies @iceybethan.bsky.social · 20/02/2026
The future of the Antarctic Peninsula depends upon the choices we make today. www.bas.ac.uk/media-post/s...
bas.ac.uk
Scientists reveal our best- and worst-case scenarios for a warming Antarctica - British Antarctic Survey
New study on the Antarctic Peninsula shows that the choices we make in the next decade will determine Antarctica’s fate for centuries
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Observatoire des Sciences de l'Univers de Grenoble @osug-fr.bsky.social · 20/02/2026
#Climat | Écouter les #glaciers pour décrypter leur instabilité Une étude menée par @igegrenoble.bsky.social montre que le #RechauffementClimatique n’affecte pas seulement la fonte des glaciers, mais peut aussi déclencher des accélérations rapides de leur écoulement. 📖 Lire l'actu : urlr.me/rmfheK
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OCEAN ICE @oceaniceeu.bsky.social · 18/02/2026
📄Read this article on When Antarctic Icebergs get Stuck on the Seabed: Why it Matters for Climate, that Anna Olivé Abelló from WP2 in OCEAN ICE! Read the full article on Institut des Géosciences de l'Environnement here: ⬇️ www.ige-grenoble.fr/...
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Julius Garbe @handle.invalid · 16/02/2026
🔔🚨 New Publication Alert! Research has shown that the Antarctic Ice Sheet is a climate tipping element. We found: it’s not one — it’s many. 📄 Paper (open access): www.nature.com/articles/s41... 📢 Press release: www.pik-potsdam.de/en/news/late... Tread below 🧵👇
Photo showing a tall, jagged ice front of the Ronne Ice Shelf in West Antarctica rising above the calm surface of the Weddell Sea. Credit: Torsten Albrecht / PIK.
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Carbon Brief @carbonbrief.org · 17/02/2026
NEW – Guest post: The challenges in projecting future global sea levels | Dr Till Bruckner and Dr Tore Hattermann Read here: buff.ly/R2NqcfU
Waves crashing against ice cliffs of iceberg in Southern Ocean. Credit: Ingo Arndt / Alamy Stock Photo
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Institut des Géosciences de l'Environnement - France @igegrenoble.bsky.social · 10/02/2026
New #subglacial #map of #Antarctica! Hills, ridges, and entire mountain ranges revealed 👉 Key for predicting ice-sheet evolution and understanding geological history 🔗https://www.ige-grenoble.fr/New-map-of-landscape-beneath-Antarctica-reveals-undiscovered-hills-and-mountain
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