Stewart Jamieson

Frontiers | Winter meltwater storage on Antarctica’s George VI Ice Shelf and tributary glaciers, from synthetic aperture radar The presence and storage of meltwater on Antarctic ice shelves has implications for ice-shelf stability and collapse, while meltwater on grounded tributary g...

Excited to share that some of the results from my master’s research have been published! Using SAR, we found evidence of winter meltwater persistence on George VI Ice Shelf and upstream of its grounding line 🛰️🧊

www.frontiersin.org/journals/ear...

Extensive fluvial surfaces at the East Antarctic margin have modulated ice-sheet evolution - Nature Geoscience Extensive flat surfaces observed beneath the East Antarctic Ice Sheet margin were formed by fluvial erosion and have modulated the ice-sheet response to climate change, according to an analysis of rad...

Great work by our colleagues Stewart Jamieson and Guy Paxman: "We have been using satellite data to map an ancient river landscape beneath the East Antarctic Ice Sheet:. The landscape has been frozen in time for up to 34 million years." ⚒️🧪

www.nature.com/articles/s41...

A snow and ice covered rocky landscape next to the sea.

Our @geogdurham.bsky.social researchers, led by @polarguy.bsky.social, have discovered the remains of landscapes thought to have formed when ancient rivers flowed across #EastAntarctica – and they could help predictions of future loss from the ice sheet 👉 www.durham.ac.uk/news-events/...

It was my greatest pleasure to graduate with a PhD from @geogdurham.bsky.social earlier this week! Marking a decade since I started out as a curious undergrad there, Durham was not only a place that taught me the intricacies of Geography, but also where I met some of the brightest and kindest... 1/2

‘Completely unexpected’: Antarctic sea ice may be in terminal decline due to rising Southern Ocean salinity Scientists once thought Antarctica might hold onto its sea ice as the world warmed. No longer.

‘Completely unexpected’: Antarctic sea ice may be in terminal decline due to rising Southern Ocean salinity

theconversation.com/completely-u...

Research finds using AI makes you stupid

From the latest Private Eye, out now.

Mélange or landfast ice: What controls seasonal calving at Greenland outlet glaciers? Abstract. Landfast sea ice and glacier mélange are part of a continuum of ice forms in front of marine-terminating outlet glaciers in Greenland. Mélange (sikussaq) has been posited to offer a buttress...

What controls seasonal calving in Greenland? New preprint just landed in the EGUsphere - reporting our glacier melange results from fieldwork on the fast ice and (unusually for glaciology) in the melange zone itself in NW #Greenland near Qaanaaq: 🥼❄️🌊⛏️⚒️🧪

egusphere.copernicus.org/preprints/20...

📢 The final ArcticDEM & REMA release is here - and it might be the last. Funding cuts put vital polar data at risk. Help us rally support: take the survey! 🔗https://z.umn.edu/pgc-dem-survey #PolarScience #SavePolarData

Learn more: www.pgc.umn.edu/news/final-p...

Cover of book "Antarctica and the Earth System"

New book!! 📕

Antarctica is intimately connected to the rest of our planet, affecting climate, ecosystems, cultures and society. Our new book draws together international experts to explore this influence, and to understand what humans are doing to Antarctica (1/n)
www.routledge.com/Antarctica-a...

A screenshot of https://www.polarview.aq/antarctic showing the footprints of Sentinel 1 and Radarsat Constellation Mission (RCM) products in turquoise and yellow colours respectively.

A screenshot of https://www.icelogistics.info/antarctic showing a Sentinel-1C image of the Brunt Ice Shelf displayed on the map viewer. Sea ice is dark black and hazy grey shades, and the ice shelf is brighter grey and white. Details of the images can be seen in a pop up.

🎉 Imagery from the newly launched Sentinel-1C Copernicus satellite is now accessible via Polar View www.polarview.aq and the Ice Logistics Portal www.icelogistics.info/antarctic?ce...! This addition significantly increases the repeatability of SAR observations in the Polar Regions 🛰️

shallow ice approximation shallow ice approximation. GitHub Gist: instantly share code, notes, and snippets.

I wrote up a tiny 2d shallow ice approximation python notebook for my continuum mechanics course.
gist.github.com/grinsted/d5d...

Ryan, thanks for your visit. It's been great to discuss Antarctica and so much more besides. You are welcome to return anytime!

Out now! Available in the #C3S data store: ERA5 hourly time-series data on single levels from 1940 to present. As a regridded subset of the full #ERA5 dataset on native resolution, it is designed for retrieving long time-series for a single point.

👉 cds.climate.copernicus.eu/datasets/rea...

My first achievement of the week. Probably peaked too early.

Finally published @science.org:
Can AI help yield new insights from vast amounts of Earth data?
We use large-scale data and neural nets to find the constitutive laws of glacial ice, which differ from commonly assumed forms in conventional models. #ScienceResearch
www.science.org/doi/10.1126/...

A reminder that abstract submission for the @igsoc.bsky.social Symposium on Ice Streams & Outlet glaciers @geogdurham.bsky.social closes 24th March. We're looking forward to presentations from both contemporary & palaeo perspectives to encourage cross-pollination of ideas & research approaches! ❄️⚒️🧪

Crazy indeed. And a scandalous waste of taxpayer money. Much better to invest the money in reducing CO2 emissions instead.

Joint RINGS & @royalsociety.org Meeting on Ice-Sheet Bed Measurements, 6–9 May 2025, University of Edinburgh

📍 8 May: Advancing Antarctic bed topography data
📍 9 May: #AntarcticRINGS initiatives in the Antarctic Peninsula & Weddell Sea
scar.org/scar-news/cr...

Please register in advance.

Bedmap3 is now out
rdcu.be/ecTmO

Heartening to see so many people organise for facts. Solidarity to all colleagues in the US #standupforscience2025

Brilliance from @privateeyenews.bsky.social !!

@bas.ac.uk

❄️🥼🧪🌊

Glad to contribute so much data to this project from mass balance work 1984-2024.

This (and this is just the tip of the iceberg) is what happens when you try to run government like a business.

25-50% of staff will be laid off at NSF, and with it, no doubt, an end of US supremacy in science. Absolutely catastrophic. 🧪⚒️❄️

www.politico.com/news/2025/02...

The #Greenland Ice Sheet is cracking open more rapidly as it responds to climate change.  Research led by @tomchudley.bsky.social from @geogdurham.bsky.social found crevasses had significantly increased in size and depth in just five years 👉 bit.ly/4aKE8l7

@leverhulme.bsky.social #DUresearch

A satellite image showing lots of meltwater pool on an ice shelf in the centre, and rocky outcrops on the left (west) on Alexander Island, and Palmer Land on the right (east).

Fossil Bluff region on Alexander Island

Hodgson Lake, Citadel Bastion and Corner Cliffs on Alexander Island.

Beautiful Sentinel-2 imagery of George VI Ice Shelf with lots of meltwater from yesterday. The patterns that this water produces is like artwork! Fossil Bluff is shown in the second image, and Hodgson Lake shown in the last - a former subglacial lake sealed under ice thick perennial ice ❄️

Currently 50 hours without power since storm. @northernpowergrid.bsky.social are suggesting it will be at least another day. Old energy infrastructure in this region seems very vulnerable to our increasingly stormy weather.

Victor Alpha Zulu and Victor Bravo Bravo picking up some kit from us as we get ready to depart the field over the next days if weather allows. Thanks to Dan, Al, Marie and Sam.

You didn't even leave any out of date hot chocolate in it! Disgraceful.

Someone has been here before @davidsmall.bsky.social