Happy to see this out! Meltwater can delay future surface warming, and its interannual variations impact ocean stratification & overturning.​​ This effect is usually absent from models. Including it as forcing may lead to more realistic simulation of surface temperature and sea ice trends🧊🌊 (1/7)

While waiting for climate models to represent ice-sheet dynamics, here are some datasets and methods that can be used to prescribe the evolution of iceberg and ice-shelf meltwater in CMIP-type simulations with no interactive ice sheet. This includes recent data from @oceaniceeu.bsky.social

On a related topic, we have recently published a preprint of our own work on the bistability of ocean circulation in a box model of ice-shelf cavities: doi.org/10.22541/ess... PhD work of Louis Saddier, with Chris Bull and Louis Couston.

The new UNEP report is out with the latest estimates of 2100 warming outcomes under current policies, NDCs, and net-zero targets. Here is how it compares to both the IPCC scenarios and other estimates (CAT and IEA, who will release their own updates soon!).

A few comments on our recent paper: 1- The high end is based on the SSP585 scenario which was the only one available until 2300 in CMIP6, but according to the reduced-complexity models used in IPCC-AR6, the SSP370 scenario should also cross the limit beyond which most ice shelves become non-viable.

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A link to access the full paper: rdcu.be/eNkZa

Une majorité de plateformes glaciaires de l’Antarctique menacées à long terme, dans un scénario pessimiste de poursuite du réchauffement climatique

🌊🧊🇦🇶 I am happy and proud to present our #platformist team effort out in @nature.com! www.nature.com/articles/s41... We examine if, when, and why #Antarctic #ice shelves will no longer be viable, at the latest, due to changes in #atmosphere and #ocean conditions. A little 🧵 for the experts... 1/7

Fresher waters in the Southern Ocean trapped CO2 at depth for decades www.nature.com/articles/s41...

PNAS: Six-million-year-old ice discovered in Antarctica offers unprecedented window into a warmer Earth via our NSF COLDEX & US Antarctic Program. ❄️ www.pnas.org/doi/10.1073/...

UTTERLY SURREAL LOW ANGLE GLACIER SLIDE!! 😮😱 On Saturday at 11:00 am, a 2 km-long, 25 m-high, and 150-200 m in width section detached off the Ismoil Somoni Glacier (Tajikistan) and slid down the gorge! 🧊🌊 asiaplustj.info/en/node/354309 📽️ via @volcaholic1

New research shows that near-term mitigation could spare future generations around 0.6 meters of sea-level rise caused by emissions between 2020 and 2090, making today’s decisions critical not only for limiting warming but also for coastal impacts. 🔗 iiasa.ac.at/news/oct-202...

I was interviewed for this great piece about sea level rise. Solid reporting here on the scientific controversy, but I like that Evan ended with my bigger picture quote that a lot of the controversy doesn't really matter because by 2100, we will be talking about a radically different coastline.

🚨 New paper alert! Research by postdoc Maaike Izeboud from the bglacier group in Nature Climate Change 🎉 Using 20 years of satellite data, she mapped Antarctic ice shelf fractures and showed how damage rises under high emissions but stabilises in low-emission futures www.nature.com/articles/s41...

La créatrice du programme d’échange Erasmus, Sofia Corradi, est morte

Yes the CO2 rise 2023-2024 was faster than we predicted at Mauna Loa and was a record rise there - now the WMO confirm the global mean rise was also a record Also the rate of CO2 rise is now above the IPCC scenarios that limit global warming to 1.5C www.carbonbrief.org/met-office-a...

UGH! When will it end. 😭 "Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services." nsidc.org/data/user-re...

Research, teach, or communicate about #Greenland science (in English, Danish, or Greenlandic)? ➡️ StoryMap about fjord bathymetry and ecosystem, environment, people connections. Including as Greenlanders respond to potential *lowering* local sea levels. arcg.is/10DiuG2 @lamont.columbia.edu

📢 OUT NOW: Global Tipping Points Report 2025 In this new report, we provide a check on the status of critical Earth system #TippingPoints and opportunities in #PositiveTippingPoints across sectors. ➡️ Full report: global-tipping-points.org #GTPR2025 #COP30 @exeter.ac.uk @pik-potsdam.bsky.social

Last month was the 3rd lowest #Antarctic sea ice extent on record for the month of September. This was 850,000 km² below the 1981-2010 September average. Data from the @nsidc.bsky.social: nsidc.org/data/seaice_...

Tidewater glacier calving events inspire awe and remind us to be humble. Turns out they also stir up fjord waters and amplify melt. New paper "Calving as a Source of Acute and Persistent Kinetic Energy to Enhance Submarine Melting..." ❤️glaciology agupubs.onlinelibrary.wiley.com/doi/10.1029/...

🚨 New @oceaniceeu.bsky.social preprint🚨 why has Antarctica stopped (net) losing mass, in spite of increased discharge? Declining sea ice is part of the answer but increasingly heavy and frequent atmospheric rivers are most important factor. Lots of important subtleties: arxiv.org/abs/2510.03590

Incidentally, the very nice schematic of cryosphere changes over both ice sheets was drawn by @jmalumbresolarte.bsky.social Tak! 🙏 New paper out today in @nature Geosciences: The Greenlandification of Antarctica Readcube pdf: rdcu.be/eJiqJ

Iceberg A23a continues to break apart in the southern Atlantic Ocean, near the island of South Georgia.

What humans do to change climate matters much, much more than natural climate variations in determining future ice loss from Greenland 👉 Read about the results of the Greenland Ice Sheet Large Ensemble (GrISLENS) Project in our paper out now in The Cryosphere doi.org/10.5194/tc-1...

📣📣 Call For Donations! 💰💰 I am raising funds to finance the 2025 'glacier subfossil wood' field campaign! Do you want to continue hearing tales about glaciers and trees? 🧊🌲💍 I need your help! 🤍 To learn more: wemakeit.com/projects/gla... 🙏🙏 Please share it widely! 🙏🙏

A nerdy science 🧵 to give you a break from the news: the first lead-authored paper by @gtsciences.bsky.social PhD candidate Aminat Ambelorun about “The Integrated Ice Sheet Response to Stochastic Calving”, now published in ‪the @igsoc.bsky.social‬ Journal of Glaciology doi.org/10.1017/jog....

📘[BD] Comprendre le glissement des glaciers avec SAUSSURE À travers le récit d'une expédition scientifique sur le glacier de l'Argentière, découvrez le travail de glaciologues de l'@igegrenoble.bsky.social, une BD signée Marine Jambeau 🔗 urlr.me/2vPyGb @cnrsalpes.bsky.social @echoscigre.bsky.social

It's the first International Day of #Glaciers! The ice worldwide is under threat due to rapid #climatechange. This day puts a spotlight on glaciers as a vulnerable but globally relevant element of the climate system. It is not yet too late to save them! @vaw-glaciology.bsky.social

For the morning crowd: I wrote a thing on the latest #SeaLevelRise science from the @h2020protect.bsky.social project sternaparadisaea.net/2025/03/19/p...