iiinova — where your digital self keeps evolving

Aslak Grinsted @glaciology.net · 19/03/2026

3Myr old mean ocean temperatures from the Allan Hills Blue Ice area. phys.org/news/2026-03...

Aslak Grinsted @glaciology.net · 21/12/2025

Quite happy about this assignment for my inverse problems course (heavily based on material I inherited from Klaus Mosegaard). It is a gravity inversion problem using old IPY data.

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Aslak Grinsted @glaciology.net · 17/11/2025

I just downloaded a textbook in epub format. It is actually possible to read it on my phone. (Unlike the pdf). I like it.

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Gavin Schmidt @climateofgavin.bsky.social · 28/10/2025

This is cool, 6 million year old ice from Antartica with inferred temperature ~12°C warmer than the late Pleistocene. No CO2 level yet! (That will be highly anticipated!) www.pnas.org/doi/10.1073/...

pnas.org

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

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Helle Astrid Kjær @h-a-kjaer.bsky.social · 08/06/2025

Our traverse fieldwork had been accomplished www.green2ice.eu/2025/06/07/j...

green2ice.eu

June 7: Success! The casing of the GRIP borehole finally located – green2ice.eu

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Aslak Grinsted @glaciology.net · 02/06/2025

A PhD fellowship in computational and mathematical modelling of flow and fracture in ice sheets. jobportal.ku.dk/phd/?show=16... Application deadline tomorrow

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Paul Bierman @paul-bierman.bsky.social · 23/05/2025

We lost a giant in polar and climate science this spring. Chet Langway, a man who was there at the start of ice core science and kept miles of cores frozen for decades of scientific study. ❄️🧪💙📚 #scicomm #climate #UVMresearch #science 🌎 🔬 ⚒️ #ClimateHealth www.buffalo.edu/ubnow/storie...

buffalo.edu

Remembering Chet Langway

Considered the pioneer of ice core drilling, the late UB professor emeritus' work extracting climate data from ice sheets continues at the university today.

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Aslak Grinsted @glaciology.net · 22/05/2025

I have built a cool little prototype ML algo that can estimate population density in 20m resolution from S2 imagery. Here are 5 examples. Row1: Sentinel-2. (input data) Row2: population density from eurostat. (input data) Row3: ML model population density. (output data)

5 random places in EU . Shows how my ML model 'guesses' where people live.

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Aslak Grinsted @glaciology.net · 21/05/2025

Why do these 2 numpy lines not give the same result? Aaargh! data[range(1,3),range(1,3)].shape -> (2,) data[1:3,1:3].shape -> (2,2) I don't want the diagonal!

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Aslak Grinsted @glaciology.net · 19/05/2025

Bedrock reached at the Ice coring on Müller ice cap (Axel Heiberg Island). I bet that we would reach at 611m --- pretty close to the final 613m. (Bo guessed 612m so i didn't win).

Group photo of the ice coring crew at Müller ice cap posing with the bottom part of the ice core. A sign says "Müller ice cap 613m"

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Aslak Grinsted @glaciology.net · 14/05/2025

They got the EGRIP camp weather data flowing out of camp. alice.egrip.camp

screenshot of the EGRIP weather web page.

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Mike Sowden @mikeachim.bsky.social · 12/05/2025

The resulting cataclysmic backsplash of water - a MEGATSUNAMI - was around 200 metres tall, and sent 100-metre-high waves racing across the fjord to smash against the other side of it. (This is still not the crazy bit!) 5/

Unsplash photo by Tino Rischawy of a large wave crashing against rock.

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Aslak Grinsted @glaciology.net · 12/05/2025

Crude estimate of the bicycle accident risk per km. (Sure to convince my teen girls to wear their helmets.) Numbers for denmark: Accidents: 15000 per year Trips: 2e6 per day Avg trip length: 3.2km =Approx: 1 accident per 150e3 km stormgmtpbie.z6.web.core.windows.net/cykelregnska...

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Aslak Grinsted @glaciology.net · 08/05/2025

Greenland accumulation in terms of cucumbers. * Greenland acc = ~600Gt/yr. * global pop = ~9bn. So ~7.5 kg/person/hour * cucumber water content = ~166g So ~45 cucumbers/person/hour Unfortunately global cucumber production is only 95 Mt/yr = 1.2 cucumber/person/week 🥲

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Adrian Luckman @adrianluckman.bsky.social · 01/05/2025

Large fractures continue to open up at the grounding line of Thwaites Glacier Eastern Ice Shelf. Animation contains @copernicusland.bsky.social #Sentinel-1C data alongside 1A and 1B

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Aslak Grinsted @glaciology.net · 01/05/2025

Alot of ML at EGU. Some of it good, but also some pretty random stuff.

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Andrea Securo @andreasecuro.bsky.social · 28/04/2025

It's so sad to see that this incredible dataset, which has redefined how we approach many Arctic-related studies, may not be updated in the future 😞

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Uofficiel dr.dk nyheder bot @drdk-nyheder-bot.bsky.social · 23/04/2025

Norge vil lokke forskere til landet: 'Det handler især om situationen i USA'. I Norge har Forskningsrådet, der prioriterer og deler penge ud på vegne af staten, afsat 100 millioner norske kroner (cirka 63 millioner kroner) til at lokke udenlandske forskere til landet.

dr.dk

Norge vil lokke forskere til landet: 'Det handler især om situationen i USA'

I Norge har Forskningsrådet, der prioriterer og deler penge ud på vegne af staten, afsat 100 millioner norske kroner (cirka 63 millioner kroner) til at lokke udenlandske forskere til landet.

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Tas van Ommen @tasvo.bsky.social · 15/04/2025

#IPICS followers take note. The icecore subcategory is around 4GB and probably worth having at hand. #AlexandriaLibraryLuddites

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Aslak Grinsted @glaciology.net · 13/04/2025

I need a new circular saw and would like the batteries to be compatible with my other DeWalt tools. But i am wondering if i should jump ship to some non-US brand. Also - they apparently have extra high exposure to the tariff situation.

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Helle Astrid Kjær @h-a-kjaer.bsky.social · 11/04/2025

Come work with us PhD fellowship modelling flow and fracture in #ice sheets jobportal.ku.dk/phd/?show=16... (application deadline 3 June) @precise-project.bsky.social

jobportal.ku.dk

PhD fellowship in computational and mathematical modelling of flow and fracture in ice sheets

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Ruth Mottram @ruthmottram.eurosky.social · 10/04/2025

Who wants to work on the Arctic in Copenhagen? Super postdoc job going with our friends at Aarhus University* together with DMI on climate modelling and Arctic influences on the mid-latitudes: *at a campus not actually in Aarhus but just outside Copenhagen international.au.dk/about/profil...

international.au.dk

Postdoc in Climate Modelling and Arctic-Midlatitude Connections - Vacancy at Aarhus University

Vacancy at Department of Environmental Science - Atmospheric Emissions & Modelling, Aarhus University

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Aslak Grinsted @glaciology.net · 02/04/2025

Scandinavia in March vs April #modis

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Aslak Grinsted @glaciology.net · 26/03/2025

The Overleaf integrations with git and zotero is so great. New figures will appear in Overleaf when I commit and bib file sync also only takes a click.

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Helle Astrid Kjær @h-a-kjaer.bsky.social · 26/03/2025

The Danish Meteorological Institute (DMI) is offering a 3-year, full-time position as a Scientist for Modelling Ice Sheet–Climate Interaction. @precise-project.bsky.social candidate.hr-manager.net/ApplicationI...

candidate.hr-manager.net

Scientist for Modeling Ice Sheet–Climate Interaction

Are you interested in working with climate and ice sheet models? And motivated by understanding climate change in the Arctic and Antarctic regions? Here is a gr

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Helle Astrid Kjær @h-a-kjaer.bsky.social · 26/03/2025

A three-year #postdoc in #machinelearning emulators of #ice-ocean processes is available at Northumbria University as part of our novo funded project PRECISE @precise-project.bsky.social

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Aslak Grinsted @glaciology.net · 26/03/2025

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

gist.github.com

shallow ice approximation

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

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Dr Dan Shugar 🇨🇦 @watershedlab.bsky.social · 11/03/2025

In case the existing news wasn't enough to put you in a funk 🧪⚒️

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Aslak Grinsted @glaciology.net · 01/03/2025

Moomin=Kant? Tove Jansson made the first drawing of a moomin troll in an outhouse after an argument with her brother where one of them was quoting Immanuel Kant. I heard two different versions of that story. In one of them the Moomin troll was intended as a caricature of Kant.

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Aslak Grinsted @glaciology.net · 26/02/2025

Fluid dynamics in an absolutely beautiful 64k computer demo. youtu.be/R-4wHUw_OdE?...

youtu.be

Empires

YouTube video by Conspiracy

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Aslak Grinsted @glaciology.net · 26/02/2025

I'm considering if my continuum mechanics course should cover some intro plasma physics too in the future. Any good books that span that space? Some keywords: (elastic solids, viscous fluids, to plasma physics).

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Aslak Grinsted @glaciology.net · 26/02/2025

I am looking at different Lab/Lch colorspaces (OKLab/SR2Lab/...) - One issue they share is that the RGB color you get for very dark L-values becomes negative. Seems non-sensible to me.

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Aslak Grinsted @glaciology.net · 25/02/2025

Any recommendations for a book on inverse problems covers both linear and Bayesian techniques - ideally with examples from earth science.

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Dr. Evan J. Gowan @evangowan.bsky.social · 21/02/2025

Fichtner et al present the results of seismic measurements from the EastGRIP borehole in Greenland. Earthquakes that were measured in the core reveal brittle deformation mechanisms that are not accounted for in the most commonly used ice flow law, Glen's Flow Law. doi.org/10.1126/scie...

doi.org

Hidden cascades of seismic ice stream deformation

Ice streams are major regulators of sea level change. However, standard viscous flow simulations of their evolution have limited predictive power owing to incomplete understanding of involved processe...

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Aslak Grinsted @glaciology.net · 18/02/2025

Anybody has access to recent very high resolution satellite imagery of Greenland. We want to know if a Ø22cm pipe is still sticking out of the ice at this location: 75.09714423N, 42.31992755W (5m uncertainty) Please help - it could save a lot of fuel (It is the NGRIP borehole casing)

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Aslak Grinsted @glaciology.net · 13/02/2025

Colonial mining profits... Denmark has made huge profits from a cryolite mine in Greenland. A new explosive documentary has sparked debate in DK. I think the criticism of the documentary is a bit unfair - the caveats regarding the 400bn are clearly highlighted IMHO.

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Earth and Space Research @earthspaceresearch.bsky.social · 11/02/2025

A new paper about the Antarctic Ice Sheet in a special issue of @science.org reviews critical knowledge gaps in our understanding of how Antarctica responds to variations in global climate. Antarctica in 2025: Drivers of deep uncertainty in projected ice loss www.science.org/doi/10.1126/...

Picture of Antarctic Ice Sheet as seen from plane. Photo by Susan Howard, ESR

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Dr. Evan J. Gowan @evangowan.bsky.social · 10/02/2025

de Wit et al present a new database of Holocene sea level indicators and proxies for the Netherlands. This could be one of the best vetted datasets of this kind ever published, and it contains over 700 data points! doi.org/10.5194/essd...

doi.org

HOLSEA-NL: a Holocene water level and sea level indicator dataset for the Netherlands

Abstract. Deltas and coastal plains worldwide developed under the influence of relative sea level rise (RSLR) during the Holocene. In the Netherlands, Holocene RSLR results from both regional sea leve...

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Aslak Grinsted @glaciology.net · 10/02/2025

Loewe 1936: "... there is a strong evidence that the Greenlandic ice cap is not quickly decreasing today but in a nearly stationary condition". Pretty impressive statement considering the sparse data at the time. I'd love a pdf of that paper. Anybody? www.buchfreund.de/de/d/p/79453...

screenshot of the first page of Loewe 1936.

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Chris Baraniuk @chrisbaraniuk.com · 06/02/2025

NEW: What extreme weather or climate change disaster sensors could you use in your home to give you an early warning, and time to respond? I spoke to one climate scientist who found flood sensors indispensable recently! www.thereengineer.pro/p/climate-ha...

thereengineer.pro

Climate hazards: ‘This flood sensor saved my basement’

How gadgets could alert you to the effects of extreme weather.

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Edie Schaffer ❌👑 @sfedie.bsky.social · 04/02/2025

After #Trump used a Sharpie to alter the projected path of #HurricaneDorian on a map to show #AL in its path, #NeilJacobs helped draft a #NOAA statement backing Trump’s projection. An internal NOAA report determined Jacobs violated the agency’s scientific integrity policy by issuing the statement.

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Aslak Grinsted @glaciology.net · 27/01/2025

End of an era. The final Symposium of the EastGRIP project.

People sitting in an opulent room listening to talks.

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Aslak Grinsted @glaciology.net · 25/01/2025

I have moved the entire family to immich instead of Google Photos and it is great. Open Source appreciation day.

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Aslak Grinsted @glaciology.net · 15/01/2025

I wish that VS Code would remember which environment i last used for a python notebook. -Or maybe if i could add an annotation clue to the first cell with the name of an environment. Just like i can add "#!/usr/bin/env bash" to a shell script.

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