TBT Fieldwork, Spring 2025 Arrived at a distant hut — first open the hut, fire and snow clearing. Slowly, warmth returns after a day in minus 20. Svalbard fieldwork blends presence of harshness, long hours with awe. Even with a busy mind, the beauty is hard to be unnoticed.

All is reflection. Every action ripples back. The choices we make — their shine hides a shadow. Consumerism glitters, but the cost is buried deep in soil and sea. One day we will be surprised — surprised because we did not see the reflections, the causes, the links woven through everything.

🚨 Introducing the Mass Balance Machine (MBM): a #data-driven glacier MB model using topographic + climate features 🏔️ 👉 "Machine learning improves seasonal mass balance prediction for unmonitored glaciers” (Sjursen et al., 2025) doi.org/10.5194/tc-1... @vaw-glaciology.bsky.social

#Refreezing #SurfaceRunoff ❄️👉💧 Current measurements and models often overestimate how much meltwater from Greenland’s ice sheet enters the ocean because they miss key retention processes. Much meltwater refreezes in porous ice or ponds, cutting actual runoff by 9–15% compared to older estimates.

Sounds interesting …

Yay Sentinel 1D 🥳🥳🥳

❄️ Calling all glaciology PhD students! ❄️ Applications are now open for next year’s Karthaus Summer School. It’s a great experience and you will be very well fed. Apply here: www.projects.science.uu.nl/iceclimate/k...

It was a pleasure to organise the workshop with my amazing colleagues from APECS Norway! What a kick-off for #SvalbardScienceConference with early career researchers exploring Arctic careers, fieldwork, EDI, and collaboration. Thanks to all who joined and supported an inspiring day!

Did meltwater from circum-Arctic ice sheets trigger AMOC weakenings during past deglaciations? We think that we can present a convincing line of evidence, from the central Arctic to the North Atlantic. See our recent paper in QSR: doi.org/10.1016/j.qu...

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...

Here's a closer look at the record low sea ice conditions around #Svalbard. The ice edge is still close to the 85°N line of latitude along the Atlantic front. That's a lot of open water into the Barents Sea region! Data from AMSR2.

'Eight of Sweden's 277 glaciers melted completely during 2024 and are now extinct due to global warming... Another 30 glaciers are at risk, glaciology professor Nina Kirchner said. The extinct glaciers "won't come back in our lifetime and not if global warming continues", she said.'

PostDoc in "Glacier Geophysics" (d/f/m) - Bremerhaven, Bremen, Germany - www.earthworks-jobs.com/job?id=11181 #PostDoc #Geophysics #geophysics #glaciology

Now that we know of 12 more sub glacial lake -filling and drainage events in Antarctica, the connection to the ice stream velocities or calving frequency would be very interesting… #glaciology #glacierhydrology #subglacialhydrology #icedammedlakes #icesheets #antarctica #hydrology

Our new paper compares GPR ice thickness data with models and looks at glacier thermal structures in Greenland, showing that thermal complexity (warm-cold ice) inside these glaciers is higher than expected. Read it here: www.cambridge.org/core/journal...

🔍 From petabytes to picks: Data mining empowered by a cloud-native workflow turns 1.3 PB of seismic data into the first global-scale database of 4.3 billion P- and S-wave picks. Read more: seismica.library.mcgill.ca/article/view...

📊 30+ years of Arctic weather data from 700+ sites now open-access! 🔹 30+ variables incl. temp, snow, soil moisture 🔹 Clean format + open-source code 🌍 Track #permafrost, #tundra, #carbon, & more 📥 Dataset Access data here 👉 ic3.uit.no/news/arctic-... #Arctic #ClimateData #iC3 #dataset #snow

“The cost of inaction will always outweigh the cost of action" . . . #ClimateChange #Glaciers #Globalsealevelrise #Glaciercollapse #icesheets #floods #Glofs

Ak-Shyirak massif (max. 5000 m, Kyrgyzstan) one week ago..🏔️🧊 Not the slightest accumulation zone! 🔥 As if global warming weren't causing glaciers to disappear fast enough, mining is doing it even faster! ⛏️ This gold mine today worth ~20% of KGZ’s GDP! 💰 📷🛰️ Pleiades Glacier Inventory 1/

One more for my colleauges in #Pakistan - Temperature change in the capital #Islamabad. 😳😶‍🌫️ Although #glacier change data is sparse in Pakistan, one can just imagine the change after the year 2000. The news are filled with #GLOFs #Floods 🌊 and Erosion… showyourstripes.info/c/asia/pakis...

Temperature change in #Svalbard, no surprise but still scary 😧. Produce your own graph here: showyourstripes.info/b/europe/nor...

2022-2025 ice caps across Edgoya, Svalbard lost all snow cover, resulting all firn cover being lost too. This removes ability of meltwater to refreeze. In 2025 we again see this playing out on the ice caps of Edgeøya. @yogaski.bsky.social @willharcourt.bsky.social glacierchange.blog/2025/09/11/s...

On Svalbard, rain falls where snow once lay. The white patches of ice and snow slip away, leaving the mountains darker, bare, and heavy with melt. What once gleamed now fades—a stark reminder of a world warming too quickly. #Svalbard #Climatechange #cryosphere #glacierchange #glaciology

Annual mass balance survey with AG-315 UNIS students at upper Foxfonna near Longyearbyen. Even after last summer’s record heat, ~1 m of ice was lost at 550–600 masl. On low‑elevation #Svalbard glaciers, melt overwhelms any chance of accumulation ~ highlighting the sensitivity of the ice to temp

'Forage d'un piquet de fusion au profil bleu' 2 Sept. 1930 Allouard Vintage glaciology! ⏳❄️ Installation of ablation stakes at the Tré la Tête Glacier using a bucket of hot water in lieu of steam ice drill! 🔥🧊💧 Source @GallicaBnF @matthias-huss.bsky.social @landervt.bsky.social

Cool new library for physics-informed neural networks for glaciology problems, led by Gong Cheng @dartmouthears.bsky.social gmd.copernicus.org/articles/18/...

❄️ Less snow, weaker glaciers In Tajikistan’s Pamirs, snowfall has dropped since 2018, hurting glacier health and reducing meltwater supplies for downstream communities. 🔗 www.nature.com/articles/s43... #SciComm 🧪 #Glaciers

📢 Workshop for #Early-Career Polar Scientists 27 Oct 2025 | 09:00–17:00 📍 Auditorium 1, UiO Geosciences, Oslo 🔗 Sign up here: forms.office.com/r/AKMpi6N0ni Or scan the QR Join us ahead of the #Svalbard #Science #Conference for a full-day workshop on #polarresearch and #networking! #Glaciology

A powerful piece by @mountainogre.bsky.social on #microbes and #Arctic change, featuring our work on glacier ecology @aberdlsagb.bsky.social and work on methane cyclers by colleagues at UNIS www.theguardian.com/world/2025/a...

Sad views from southern #Svalbard 30.8.25 - melt has reached high up the mountains. From Hornsund to Amundsenisen barely any snow left… how should glaciers build mass like this? Svalbard is heating fast. Only steep mountain walls seem to help accumulate a bit and catch blown snow 📸from✈️ #Glaciology

I was shocked when I first saw these results from standard climate models used in IPCC reports: for high emissions, the Atlantic overturning circulation #AMOC shuts down in all 9 models that ran past 2100, and is well on the way to shutdown by 2100. Our paper on that is out today.🧵

We're approaching the annual sea-ice minimum in the Arctic. Over the past few days, the sea-ice extent has been at a record low for this time of year in the Greenland Sea and Svalbard region. Data source: @osi-saf.eumetsat.int

Witnessing the rapid and extensive thawing of permafrost in Svalbard is truly impressive but deeply concerning

I hope we never stop caring for others. . . . . Art by faida.acquifera (instagram)

Good article explaining Antarctic change, except loss of the marine-based West Antarctic Ice Sheet probably doesn't depend on whether or not global average temperatures rise to 2°C above pre-industrial. Recent results from study of it point to its loss already being committed.

Impressive… I would like to know what’s happening at the base of the crevasse… water- hydro fracturing? Meltwater intake ? Drainage of pfas? What’s the air temperature in there ? So many questions to be answered about the role of these gigantic crevasses to the ice sheets and glaciers…

A midnight GLOF or debris flood in Gupis, Pakistan, blocked the river, cutting off villages & threatening homes downstream.Thanks to a shepherd’s warning, lives saved—no early-warning system, no satellite data..climate disasters hit the Himalayas hard -people facing peril with the least support…

Worst situation of glaciers in Central Asia ever... 🥵 Shown here is Grigoriev ice cap (4600 m asl, Kirghizistan) Not a single snow patch left up to the summits, for the first time in over 10 years! 😱 Pics and MB data by @landervt.bsky.social 🙏

A six-week period of extraordinary heat in 2024 melted 62 gigatonnes of ice on the Arctic archipelago of Svalbard, obliterating all previous melt records… #Svalbard #Glaciology #GlacierMassBalance

🌊 For the 3rd year in a row, Alaska’s Suicide Basin glacier dammed lake is bursting out releasing record floodwaters toward Juneau. >This time, new flood barriers held—turning a potential disaster into just a close call. #Juneau #GlacierFlood #GlacierHazards #Glacierlakeoutburst Some info here:

Accelerated glacier melt💧 in the Himalayan region amplifies vulnerability- +risks of high discharge peaks, floods&erosion, damage🌧️ High temp at extreme elevations are intensifying these hazards, threatening the livelihoods of millions. ⚡️We need urgent action against accelerating CO₂ NOW ⚡️

Ongoing heatwave and heavy rain caused deadly flash floods and glacial lake outburst in Pakistan 2025 so far—destroying parts of Karakoram Highway, farmland, homes, and killing ~15 people. Glacier melt and high river discharge threaten more erosion in Gilgit-Baltistan. #pakistan #glacier #climate

New flood from Shisper, a glacier which we surveyed last year. Shisper had surge events in 1906, 1972-1976& 2017-2019= advance of 47meters. 🙀 Result was an ice dammed lake with GLOFs ⚡️Now the surged 🧊 is melting so fast leading to floods again. Literature:Bhambri, Rashid2020; Muhammad2021

#Funding #Glaciology #Iceremotesensing Do you conduct Earth System Science and monitoring? Are you interested in funding that facilitates your access to SIOS research infrastructure? → Apply for the 2025 SIOS Access Call! • sios-svalbard. org/AccessCall_2025 Application deadline: 20 August 2025

#Glaciology Community Resource: NASA hosts webinars on how to use ICESat-2 data. All webinars recorded and can be streamed 🤗

Overpressurised water outbursts at glacier surfaces previously seen in GLOFs;jøkulhlaups at Grímsvötn, Iceland, and at my study site Hardangerjøkulen, 🇳🇴 now in Greenland too. Fascinating and a question: What can we learn from th event about glacier drainage systems in climate change? #glaciology

❄️ June 2025: Arctic sea ice extent 6% below average, 2nd lowest June in the satellite record. Antarctic extent 9% below average, 3rd lowest on record for month. Full sea ice highlights in the #C3S bulletin: climate.copernicus.eu/sea-ice-cove... @osi-saf.eumetsat.int

People tell me nobody wants to look at climate curves anymore, yet here we are!!! Please enjoy our interactive journey through 485 million years of climate history and dive into the fascinating and important work of paleoclimate scientists. 🎁 www.zeit.de/wissen/umwel...

“It takes tens of thousands of years for an ice sheet to grow, but just decades to destabilize it by burning fossil fuels. Now we only have a narrow window to act.”