South Korean RV ARAON is indeed the only ship in the world regularly visiting Thwaites Glacier, Antarctica. US no longer has a dedicated Antarctic RV. ARAON headed south now, with Raymond Zhong (NYT) & Miles O’Brien @pbsnews.org on board documenting! Gift link: www.nytimes.com/2025/12/27/c...

Parker et al provide a revised model of the ice sheet margin retreat of the Ross Sea sector of Antarctica. They show there was a rapid retreat of ice shelf between about 6900 and 5400 years ago. doi.org/10.1038/s414...

Ice sheets are a major source of long-term sea-level rise. ESM2025 improved how Earth System Models represent them by enabling dynamical ice-sheet components in UKESM and IPSL-ESM. These models can now simulate ice-sheet evolution in response to climate forcing & its influence on global sea level.

Drilling a 200m sediment core from the bedrock beneath 500m of Antarctic ice is a complex process, so we've broken it down step-by-step in this explainer. From melting snow in our flubbers through to filling our core barrels, what we're attempting 700km from the nearest base is no mean feat!

Démantèlement du NCAR : une déclaration importante de la direction du CNRS-INSU

How is Antarctic Bottom Water formed at Cape Darnley? With @oceanhelen.bsky.social and others we show: ❄️ Mackenzie Polynya boosts formation 🧊 Amery Ice Shelf melt suppresses formation Important for future climate projections agupubs.onlinelibrary.wiley.com/doi/10.1029/... UQ, @antarctic.bsky.social

Super compte rendu de libé sur le triste état de nos glaciers, mesurés par des générations de glaciologues @igegrenoble.bsky.social

NCAR is quite literally our global mothership. Everyone who works in climate and weather has passed through its doors and benefited from its incredible resources. Dismantling NCAR is like taking a sledgehammer to the keystone holding up our scientific understanding of the planet. Unbelievable.

Over the moon that this paper is now out! A lot of work and submitted during maternity leave, but really proud of the final version. Thanks goes to all the co-authors on this. www.nature.com/articles/s41...

Our paper on a new ice shelf basal melt parameterisation is out! tc.copernicus.org/articles/19/... Small-scale processes in the ocean drive ice shelf basal melt, and large-scale ocean models can’t resolve these processes. Therefore, models use melt parameterisations, but these can still be improved.

Swirly swirly #cartopy #spilhaus #python

Sometimes we get lucky. Nice article led by Steve Rintoul on new findings on the ocean melting the front of Denman Glacier theconversation.com/what-our-mis...

Antarctica’s future beyond 2100: high emissions drive major long-term ice loss. New study in Nature Communications by Vio Coulon and Ann Kristin Klose, showing that the fate of the Antarctic ice sheet, will play a decisive role in future sea level rise. www.nature.com/articles/s41...

🌊 1/ A robotic float has measured temperature and salinity from parts of the Southern Ocean never sampled before — underneath massive floating Denman and Shackleton ice shelves in East #Antarctica. New in @science.org #ScienceAdvances: www.science.org/doi/10.1126/...

🌊 Storms in the Southern Ocean are producing more rain 👉 28% rainfall increase (vs ERA5’s 8%) 👉 Storm rain intensity up 👉 ~2,300 Gt/yr extra freshwater in 2023 👉 Ocean “cooling by evaporation” up 10–15% One of Earth’s key climate buffers is shifting. theconversation.com/storms-in-th...

Two miles of ice core on the shelf at our national ice core facility in Lakewood, Colorado. The WAIS Divide core from West Antarctica is a 3400m long (deepest US core, 2nd deepest ice core ever) 68,000 year old record of high resolution climate.

Timely research highlight on land-based carbon dioxide removal approches developped by a great team !

The loudest voices don't always win: In 2023, a scientific paper in the field of #glaciology was suddenly thrown into the climate wars. I interviewed one of the co-authors @juliaandreasen.bsky.social and appreciate any reposts! [Thread] mikeyoungacademy.dk/ice-sheet-or...

The #ISMIP7 ice-ocean Antarctic focus group is recruiting a 2.5 year postdoc on ice-shelf basal melting at Northumbria University, Newcastle, UK. A great way to develop international collaborations and contribute to the improvement of sea level projections! work4.northumbria.ac.uk#en/sites/CX_...

Clear explainer of the global oceanic Meridional Overturning Circulation: figshare.utas.edu.au/articles/rep...

Now that the Sept and Oct data are (belatedly) in, it looks like 2025 will be the second warmest year in the record (~80% probability). The last three years are in a class of their own.

Hey ice sheet types! 👋 The memes about the insane number of starter packs on this thing motivated me to create one more. Please let me know who I am missing from the ice sheet world. 👇 go.bsky.app/4SxszWw

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.

If you use Wikipedia, you might have noticed that it isn't cluttered with annoying ads. They depend entirely on donations to remain free & independent. Why not toss them a few bucks? donate.wikimedia.org/w/index.php

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! 🙏🙏