Between 1992-2025, large areas of the grounding line of #Antarctic glaciers have retreated. The largest changes have occurred in W. Antarctica, where grounding lines have retreated 10-40+ km, driven by incursions of warm water masses along deep bathymetric troughs www.pnas.org/doi/full/10.... ❄️🧪🌊

Antarctic ice sheet folk, I'm looking for a Postdoctoral Fellow in Antarctic Ice Sheet Reconstruction [readvertised] for a 3.5yr appointment in Tasmania. Very flexible start date! Join our new team, figuring out what is happening and what may happen in East Antarctica. 1/4 ❄️

If you're interested in how ice sheets respond to climate, particularly over very long timescales, you might be interested in our new (open access) paper: www.nature.com/articles/s43...

Resolving the past history of the Cook Ice Shelf region of East Antarctica

North-easterly blowing sea ice around off Scott Base, 29/01/26.

Cores of turtle scutes (shells) are not an archive I usually analyse! Nice to go back to my marine science roots 😃 We identify a link between changes in turtle scute growth rates and environmental stressors. I have also made the code for the changepoint analysis public: github.com/MRPHarris/Tu...

Orcas amidst the sea ice off Scott Base

While Australian heatwaves were some of the very first extreme events attributed to climate change, people still underestimate how much worse they got - killing more people than all other natural hazards combined. New @wwattribution.bsky.social study. www.worldweatherattribution.org/climate-chan...

We are looking for a Senior Technician in the Ice Core Facility at Earth Sciences New Zealand, formerly GNS Science. Permanent position working with a great team at a beautiful site (National Isotope Centre, Lower Hutt). Job description + more info: www.gns.cri.nz/careers/

Working with some model outputs that rely on the venerable NCEP/NCAR reanalysis as I write this. The excellence, reach & influence of NCAR is global. Horrified but completely unsurprised by this decision.

Timeline cleanse: Antarctic sun dogs/halo version. January 2024, RAICA ice core project at Canisteo Peninsula, West Antarctica supported by Korea Polar Research Institute and US National Science Foundation. 🌞 ❄️

🧪 Another discrete ice core gas extraction for Kr81 yesterday. Always feels a little nerve-wracking melting ~1.5 kg of core (>750 m deep in this case, from Roosevelt Island)...

~ 6 million year old ice from Allan Hills! Unreal! www.pnas.org/doi/10.1073/...

This is the second part of the work we covered here, highlighting that CO2 is the dominant forcer in temperature and sea level changes during ice age cycles. (It's also a great chance for others to cover; this has not been widely reported. There's even an old ice core now that can test this!)

🧪🧵 Future change to #ThwaitesGlacier, Antarctica constitutes the largest uncertainty in #sea-level rise forecasts. The Science Coordination Office of the International Thwaites Glacier Collaboration recently issued a briefing document summarising some key findings - thwaitesglacier.org/findings

HYSPLIT user forum is down. US gov shutdown victim? hysplitbbs.arl.noaa.gov 🧪

Nice to see this paper led by A/Prof John Tibby (Uni of Adelaide) out this past fortnight. The argument for ENSO-driven mid-to-late Holocene drying in eastern Australia is perhaps less convincing than originally thought. @ausquaternary.bsky.social 🧪 doi.org/10.1002/jqs....

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...

Updated with new expert comments overnight:

NSF: The vessel [US Antarctic research vessel NB Palmer] is planned to be returned to the operator after a final cruise in October 2025.   www.nsf.gov/geo/opp/upda... @carlosmoffat.com

"evidence is emerging for rapid, interacting and sometimes self-perpetuating changes in the Antarctic environment" New review out today led by @climatenerilie.bsky.social brings together the rapid changes unfolding in the Antarctic. It's powerful, and sobering, reading.

I am not sure how many people realize the huge array of field affected by these cut to science agencies. For example, the NSF quietly stopped hosting the public available USAP photo library last month, a resource of thousands of historic United States Antarctic photos dating to the 1940s. #histsci

It's not uncommon to look across the bay and see Wellington getting drenched. Photo from Monday:

Get your tickey here for a virtual journey ✈️ to #Antarctica with @bas.ac.uk ! Perfect for kids and adults alike ❄️🥼🧪🇦🇶 Sign up➡️ tickettoantarctica.com

We’ve collected the oldest ice core, now it’s time to analyse it! 🔍 💻 The @newscientist.com have a new icy-cool video, speaking to BAS scientists about the Beyond EPICA project, highlighting why this work is so important in the face of climate change. www.newscientist.com/video/249042...

Nat Geo would kill for legit science-driven adventure like they found in “For Winter,” over content less credibly grounded in pursuit of knowledge +humans pushing limits. Instead they’ve (Disney?) gotten cold feet & deeply disrespected my colleague Ali & her family. defector.com/why-did-nati...

🌊❄️🧪 🇦🇶 Please share: We have learned that the National Science Foundation is moving ahead with plans to decommission the U.S. Research Vessel/Ice Breaker Nathaniel B. Palmer this October. If you care about Antarctic research, please read on (1/n)

Applications for the Leanne Armand award are now open. This award funds early and mid-career researchers based in Australia to access training in micropaleonotology. Applications are due 28th September, all details can be found on the AQUA website […]

📢 New paper alert! 📢 New insight into how sea ice controls the ocean uptake of carbon dioxide around Antarctica, obtained from the unique year-round Rothera Time Series. Delighted to be part of this study, led by the very excellent Elise Droste. 🧪❄️🥼🌊 www.nature.com/articles/s43...

For cryosphere/ice core folks: a 3-year postdoc on interpreting the gas records for the Australian Million Year Ice Core project has been advertised at @utas.edu.au. Applications close 13 July. careers.utas.edu.au/cw/en/job/50...

We are recruiting a PhD student for a well-supported PhD project (including $12k/yr scholarship topup and project costs). Helping to resolve Australia's vertical land motion for sea level More info: www.utas.edu.au/research/deg... 1/2

Wonderful news for the Australian Antarctic Program! Excellent appointment.

Can tropical corals find refuge at higher latitudes under future warming? In our new paper in Science Advances, we argue that coral range expansion will be *far too slow* for most coral species to outpace climate change. 🪸🌊 www.science.org/doi/10.1126/... A short 🧵 (1/16)

Great forum for palaeo folks in the Australasian region - join us!

Reminder that the #ausquaternary AGM is happening this Friday! A wonderful time to renew your membership if you haven't already... https://aqua.org.au/membership/become-an-aqua-member/ #quaternaryscience

These are really cool little nuggets of knowledge on polar climate science (not just because I made one). Check it out. https://fediscience.org/@PolarRES/114240081171781681 PolarRES - Big discoveries in bite-sized stories? 👉 Check out our new PolarRES in Practice Stories! Explore the project's […]

New laser spectrometer for water isotopes arriving on Monday! 😁😁 We're joining the Picarro family after many attempts to resuscitate our venerable LGR-brand analyser. A new era for the GNS ice core lab continuous flow analysis line! 📈📉📈📉📈

OSU is hiring! Come work at CEOAS - Open rank faculty position and director of the Oregon State Stable Isotope Laboratory. My network is small on Bluesky, please share widely! Reach out if you have questions about living in Corvallis or about CEOAS specifically. jobs.oregonstate.edu/postings/165...

1️⃣ NEW DATA: “The Antarctic Ice Sheet is thicker than we originally realised and has a larger volume of ice that is grounded on a rock bed sitting below sea-level. This puts the ice at greater risk of melting due to the incursion of warm ocean water that’s occurring at the fringes of the continent."

Innes et al find a precise date of the Los Chocoyos (Nicaragua) supervolcano eruption from tephra in Greenland ice cores. They found it happened about 80,000 years ago, several thousand years earlier than previously determined. ⚒️🧪🦣 doi.org/10.1038/s432...

The establishment of U.S. research bases in Antarctica and the signing of the Antarctic Treaty, all in the 1950s, were significant achievements in science and international collaboration. These bases have made crucial contributions to scientific research, especially in understanding climate change.

We have an exciting opportunity for postdoc to join our group at @bas.ac.uk and take part in two big ice core projects: www.beyondepica.eu and @fetch4.bsky.social. Package includes: mugs, stickers, maps, trips to Copenhagen, Grenoble and (maybe) Greenland. bas.ciphr-irecruit.com/applicants/v...

Important new paper from the GlaMBIE Team showing that glaciers worldwide lost 273 ± 16 gigatonnes in mass annually from 2000 to 2023, with an increase of 36 ± 10% from the first (2000–2011) to the second (2012–2023) half of the period www.nature.com/articles/s41...

Heads-up sea ice modellers, there's a new 4.5 yr vacancy opening here in beautiful Aotearoa New Zealand: ejye.fa.ap1.oraclecloud.com/hcmUI/Candid... Spread the word! #glaciology #academicsky #climate

Great to have @hcadd.bsky.social visit GNS this past week! 🧪 We've converted the code we developed for Cadd et al. (2021) into an R package. doi.org/10.1017/qua.... Conduct monte-carlo changepoint analysis on paleoclimate data, with age uncertainty! github.com/h-cadd/MCCPT

Another new paper this week, on #Antarctic coastal polynyas and their importance for Earth's #climate. With declining sea ice, these important features will lose their ability to create dense shelf water - essential for global ocean circulation. www.nature.com/articles/s43...

WACSWAIN has just published the main outcome of our project. Article entitled "The Ronne Ice Shelf survived the last interglacial", out today in Nature www.nature.com/articles/s41... @cambridge-earthsci.bsky.social @royalsociety.org @ercresearch.bsky.social Explanation follows

Some people on this and other social media platforms have been claiming that something dramatic is about to happen at Thwaites Glacier, and implying that this will result of an abrupt rise is sea level within a few years. So what's really going on? 🧵🧪