iiinova — where your digital self keeps evolving

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Nahel Belgherze @wxnb.bsky.social · 27/08/2026

An incredibly well-timed Landsat 9 pass captured the effects of yesterday’s catastrophic glacier collapse near the Nepal–Tibet border. The event was so massive that it was detected by seismometers around the world.

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ESA Earth Observation @esaearth.esa.int · 30/06/2026

The end of an era: On 29 June, Copernicus Sentinel-1A gathered its last science data and final image, a glimpse of Melbourne, Australia. One of its final acquisitions over Europe captured Reykjavík and western Iceland. So long, and thanks for all the fish, Sentinel-1A! www.esa.int/Applications...

Radar image of Melbourne, Australia, acquired by Copernicus Sentinel‑1A on 29 June 2026. Roads, rivers and patches of agricultural land are visible, with mountain ranges along the right side of the image.

The image shown here is one of the last over Europe captured by Sentinel-1A. It captures western Iceland and was acquired on 29 June 2026 at 18:59 UTC.

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ESA Earth Observation @esaearth.esa.int · 10/06/2026

More than 30 years of satellite observations reveal changing glacier dynamics in Svalbard ❄️ By combining @esa.int Heritage Mission data with modern satellite observations, researchers found glacier surge frequency in Svalbard has increased threefold since 2015. earth.esa.int/eogateway/su...

earth.esa.int

Heritage data uncover glacier surges across Svalbard - Earth Online

Decades of archived radar data from ESA’s Heritage missions, combined with recent satellite measurements, are shedding new light on the dynamics of Svalbard’s glaciers.

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Ketil Isaksen @ketilisaksen.bsky.social · 21/04/2026

Svalbard is thawing in April, and it’s not supposed to. 2026 ground temperatures at 0.2m depth in Svalbard spiking to 0°C in April, far exceeding the 1998-2025 median and maximum

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Jonathan Amos @jcdamos.bsky.social · 12/04/2026

I'm reasonably convinced now that Iceberg A23a has completely collapsed. The USNIC is no longer tracking a berg of that name. But A23k (also not listed) does however lumber on, albeit in a disheveled state. This view is from Thursday (9 April) NOAA-21 VIIRS. usicecenter.gov/Products/Ant...

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Jonathan Amos @jcdamos.bsky.social · 03/04/2026

End days for Iceberg A23. The two largest remaining fragments - A and K - had major blowouts on or just after the 28th of March. The largest chunks are ~50 sq km. A23 calved from the Filchner-Ronne Ice Shelf in 1986. Quite the journey it's had over four decades.

2 April. A23k after fragmentation event (Nasa)

2 April. A23a after fragmentation event (Nasa)

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Jonathan Amos @jcdamos.bsky.social · 26/03/2026

The last two big fragments of the once mighty A23 iceberg. The US National Ice Center calls the bottom-left object A23k and the top-right, A23a. Its latest report (20/3/26) said both were about 140 sq km. Latitude is roughly 50 deg S.

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Adrian Luckman @adrianluckman.bsky.social · 07/03/2026

Is this the finale for the very charismatic Iceberg A23a? Checkout Mark Poynting's great article: www.bbc.co.uk/news/resourc... Animation here (November 2025 to yesterday) thanks to NASA MODIS

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Adrian Luckman @adrianluckman.bsky.social · 02/03/2026

Thwaites Eastern Ice Shelf heading for collapse. Monthly average velocities Jan 2025 to Feb 2026 derived from EU Copernicus Programme Sentinel-1 SAR data. Grounding lines in black and yellow from NASA MEaSUREs

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Jonathan Amos @jcdamos.bsky.social · 17/02/2026

Iceberg A23a today (17 Feb). A totally clear sky. Utterly stunning. Still refusing to die. Still 500 sq km in area. Image from the Modis instrument on the venerable Aqua satellite, another oldie that's still plugging away.

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Jonathan Amos @jcdamos.bsky.social · 12/01/2026

💥 Boom! And it's just happened. The huge volumes of meltwater that had collected on the surface of iceberg A23a have triggered a massive and catastrophic hydrofracture event. Much of the berg has turned to mush. Three major segments remain, the largest about 500 sq km.

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Jonathan Amos @jcdamos.bsky.social · 13/01/2026

One big paddling pool becomes three. Today's view of iceberg A23a (left) and a view from the end of December (right). Notice how the raised rim effect, holding in surface meltwater, has re-established on all three main segments of the broken berg. A23a is turning to slush puppie.

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International Glaciological Society @igsoc.bsky.social · 14/01/2026

Iceberg A-23A first broke off the Filchner Ice Shelf in 1986. NASA EO recently shared what's left, "waterlogged berg on December 26, 2025, extensive pools of blue meltwater were visible on its surface" and still one of the largest in the ocean. More at science.nasa.gov/earth/earth-...

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Adrian Luckman @adrianluckman.bsky.social · 02/12/2025

Huge fractures opening at the Thwaites Glacier Eastern Ice Shelf grounding line

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Zack Labe @zacklabe.com · 29/11/2025

Astonishingly, sea ice still hasn't started to reform over the Barents Sea area yet of the #Arctic. This includes record low conditions around Svalbard as well. It's been a very bad few months across the region. Check out more graphics here: zacklabe.com/arctic-sea-i...

Line graph time series of 2025's daily Arctic sea ice extent compared to each year from 1979 to 2024 as shown with thin lines in colors from purple to white. There is large daily variability, but a long-term decreasing trend during all months of the year. A seasonal cycle is also visible in this region.

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Nature Geoscience @natgeosci.nature.com · 03/11/2025

⚒️ Article: Record grounded glacier retreat caused by an ice plain calving process @adrianluckman.bsky.social @etienneberthier.bsky.social @drnaomio.bsky.social www.nature.com/articles/s41...

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Jonathan Amos @jcdamos.bsky.social · 03/11/2025

Swansea Uni co-author @adrianluckman.bsky.social put this Sentinel-1 movie together. "Although the paleo record indicates some very rapid retreats in the past, the pace of retreat of Hektoria Glacier and its neighbours is unprecedented in the observational record," Adrian says.

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cira-csu.bsky.social @cira-csu.bsky.social · 16/09/2025

Iceberg A23a continues to break apart in the southern Atlantic Ocean, near the island of South Georgia.

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Will Harcourt @willharcourt.bsky.social · 22/08/2025

We have a new preprint out reviewing the monitoring & detection of Svalbard surging glaciers: eartharxiv.org/repository/v... We also compiled a new database of Svalbard's surge-type glaciers: zenodo.org/records/1524... @dannipearce.bsky.social @hazlovell.bsky.social @adrianluckman.bsky.social

eartharxiv.org

Surging glaciers in Svalbard: Observing their distribution, characteristics and evolution

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Luke Zoet @lzoet.bsky.social · 16/07/2025

Check out this time-lapse video of waves eroding an ice front from an experiment conducted in our cryogenic wave tank at the University of Wisconsin-Madison. The tank is housed in a walk-in freezer, and the waves are precisely controlled. This video captures about an hour of wave erosion.

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Jonathan Amos @jcdamos.bsky.social · 07/07/2025

In case you were wondering... Iceberg A23a seen cruising around South Georgia today by Meteosat 12. The old berg still has an area of 2,846 sq km.

Iceberg A23a on 7/7/25 Eumetsat/Meteosat 12

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Dr. Genevieve Guenther (she/they) @doctorvive.bsky.social · 26/06/2025

I hope everyone on this website thinks very carefully about this graph and then considers whether or not they need to reorder their priorities at all.

Global average temperature compared
with the middle of the 20th century

+1.0°C 2010 to
present

+0.5°C
1970 to
2010

Cooler than average
-0.5°C
1880 to 1970

• Note: Data available through May 2025. Anomalies
relative to the average temperature between 1951 and 1980. • The New York Times
2020

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Adrian Luckman @adrianluckman.bsky.social · 26/06/2025

Jakobshavn Isbrae (Ilulisat Glacier) produces 10% of Greenland's icebergs (Wikipedia). Ten years of @esa.int Copernicus #Sentinel-1 SAR data shows ice pouring into Baffin Bay. Winter advance and summer retreat of the ice front show how calving is controlled by seasonal freeze-up of fjord ice melange

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Jonathan Amos @jcdamos.bsky.social · 15/06/2025

Sentinel-1 has finally got a clear view of iceberg A23a (13/6/25). The berg is much diminished as it skirts around South Georgia. And the US National Ice Center has updated its stats: A23a is now only the world's second biggest berg at 829.79 sqNM, or 2846,11 sqKM.

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Adrian Luckman @adrianluckman.bsky.social · 10/06/2025

Nested glacier surges! This is Liestolbreen in Svalbard, surging into Nathorstbreen (which itself surged from 2008), and then being surged into by Doktorbreen. All brought to you by the magic of Sentinel-1 SAR

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Jonathan Amos @jcdamos.bsky.social · 04/06/2025

The movement of iceberg A23a over the past seven days. It's moved about 80km to the southeast of the position where it grounded off the coast of South Georgia in early March. Zoomed in animation from Meteosat-12.

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Jonathan Amos @jcdamos.bsky.social · 30/05/2025

With days shortening at South Georgia (it's about 8 hours from sunrise to sunset), optical satellite coverage in the region is getting more restricted. Not so for Meteosat, which images the Europe/Africa hemisphere regardless of season. Hence we get a few views of iceberg A23a. Still grounded.

Meteosat view of South Georgia and iceberg A23a. 30/5/25

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Jonathan Amos @jcdamos.bsky.social · 06/05/2025

There was a spectacular view of iceberg A23a on 3 May. Clear skies over the berg and South Georgia. By my measurement, A23a is no longer the world's biggest iceberg. At ~2850 sq km, it's now bested by D15a - but only just. The US National Ice Center will be the final judge on the matter.

Iceberg A23a on 3 May. Copernicus / Sentinel-3

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Adrian Luckman @adrianluckman.bsky.social · 02/05/2025

The journey of Iceberg A23a (largest, oldest, 'living' berg) since the beginning of 2024, as seen by NASA MODIS, including its five-month pirouette on the Taylor Column, short embrace by the pack ice in August, grounding on South Georgia's shelf in April, and baby calf. Watch this space for updates!

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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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Jonathan Amos @jcdamos.bsky.social · 22/04/2025

US National Ice Center formally catalogues A23c, the big off-cut from grounded behemoth A23a. Daughter berg is ~130km² - or 2x Manhattan Island. A23a (~3,100km²) only needs to lose another ~30km² to hand "World's Biggest Iceberg" title to D15a (~3,070km²) in Amery Sea.

A23a and A23c pictured off South Georgia on 22/4/25 Nasa Worldview Modis

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Jonathan Amos @jcdamos.bsky.social · 16/04/2025

A big chunk has broken away from iceberg A23a, currently grounded at South Georgia. I calculate ~110 sq km. Looks to have fractured sometime on 11/12 April. It will get a US National Ice Center designation. It should be A23c, unless I'm mistaken.

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Adrian Luckman @adrianluckman.bsky.social · 07/04/2025

Kronebreen is one of the fastest flowing glaciers in Svalbard. Ten years of @esa.int #Sentinel-1 data shows us both the annual advance/retreat cycle characteristic of melt-undercut calving in a seasonally warmed fjord, and the long-term retreat caused by climate warming. Email me for hi-res version

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Adrian Luckman @adrianluckman.bsky.social · 03/04/2025

Fantastic new animation from ESA featuring CryoSat-2 & Sentinel-1 animations, highlighting our Nature-Comms paper "The influence of subglacial lake discharge on Thwaites Glacier ice-shelf melting and grounding-line retreat" www.nature.com/articles/s41... led by Noel Gourmelan: youtu.be/vRMeiMsQkBE

youtu.be

How subglacial lakes threaten Antarctic Ice Sheet stability

YouTube video by European Space Agency, ESA

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Adrian Luckman @adrianluckman.bsky.social · 03/04/2025

So exciting! Sentinel-1C (launched December) is finally delivering data to users and we can get back to exploring 6-day-repeat interferometry and feature-tracking such as this lovely new velocity map of Helheim Glacier in East Greenland. Nice one Copernicus!

Map depicting Helheim Glacier comprised of grey-scale backscatter image overlain by colours from blue to pink denoting ice surface velocity from 2 to 30 meters per day during the period 25th to 31st March 2025

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Jonathan Amos @jcdamos.bsky.social · 02/04/2025

You don't need to be a seismologist to look at this figure and understand the huge forces that ripped through Myanmar on March 28. The M7.7 quake ruptured fully 500km of the Sagaing Fault, moving its western flank north, with >3m of slip at the surface. Data from EU Sentinel satellites.

NASA/JPL/Caltech/ARIA/Copernicus Product. POC: R Zinke/G Bato/C Speed/E Fielding.

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Adrian Luckman @adrianluckman.bsky.social · 31/03/2025

Update on Thwaites Glacier Eastern Ice Shelf from Copernicus Sentinel-1 SAR. Downloadable version here: aluckman4.wixsite.com/ade-s-world-...

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Jonathan Amos @jcdamos.bsky.social · 24/03/2025

Iceberg A23a pictured from the ISS. The space station is almost as far south as it can reach here (51.5° S, 49.0° W - altitude of 422km). Picture taken on 14 March, so the berg had been grounded at South Georgia for a fortnight by this time.

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Adrian Luckman @adrianluckman.bsky.social · 17/03/2025

As polar night ends and sunlight begins to return to Longyearbyen, lets see how the Svalbard seasons progressed last year - from ice-locked fjords in March, through to the first snows of October. Thanks to NASA MODIS via GIBS. Download at full resolution here: aluckman4.wixsite.com/ade-s-world-...

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Climatologist49 @climatologist49.bsky.social · 09/03/2025

Europe had its least snowy winter (Dec-Feb) in over 50 years. #ThisIsFine

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Zack Labe @zacklabe.com · 08/03/2025

The extent of sea ice around the world continues to remain the smallest in our satellite observation history for this time of year... More graphs at zacklabe.com/global-sea-i.... Data from @nsidc.bsky.social.

Line graph time series of 2025's daily global sea ice extent in red shading compared to each year from 1979 to 2024 using shades of purple to white for each line for between the months of January and April. The year 2023 is also highlighted in yellow, which was the current absolute record low previously. There is substantial interannual and daily variability.

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Mapping and Geographic Information Centre @magic.bas.ac.uk · 04/03/2025

The world's largest iceberg, A23a, appears to have grounded close to South Georgia. We've been monitoring and mapping this berg for many years now and we're watching closely to see what it might do next! These maps show its route since 1986 and the latest position to the SW of South Georgia ❄️🐧 1/3

A map of the recent positions of iceberg A23a from 17th Jan - 3rd March 2025. Bathymetry is shown on the map, with shallow shelf areas indicating where the iceberg is stuck on the seafloor.

A map showing the track of iceberg A23a from calving (breaking off) the Filchner Ice Shelf in 1986, to its most recent position SW of South Georgia. The track is shown with purple dots. Bathymetry is shown with a blue colour ramp.

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Dr Heïdi Sevestre @drheidisevestre.bsky.social · 27/02/2025

Rain in the northernmost city on Earth. This month temperatures have been almost always above normal. The Arctic is becoming totally unrecognisable. And in the meantime #BP and #Equinor are doubling down on fossil fuels. Profits over people. Profits over a liveable Earth.

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Melaine Le Roy @subfossilguy.bsky.social · 25/02/2025

Pisgana West (Adamello, IT) 1990 | 2021 Remember the 1990s? ⌚️❄️ Seems so far away from a glaciological point of view! 😱 And the most recent pic here was taken before the recent record-breaking heatwaves which wiped out 10% of Alpine ice in just 2 years! 🔥 📷 Servizio Glaciologico Lombardo

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Adrian Luckman @adrianluckman.bsky.social · 26/02/2025

Pine Island Glacier accounts for a large proportion of recent Antarctic ice loss. This 7.5 year animation from Sentinel-1 shows the weakening of the lateral margins and the stochastic nature of the calving process. Grab a full-screen version here: aluckman4.wixsite.com/ade-s-world-...

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Timothy Snyder @timothysnyder.bsky.social · 21/02/2025

Americans proposed that Ukraine concede half of the profits from its mineral rights in perpetuity... in exchange for essentially nothing. This is not a monetary proposition, let alone a "deal," but rather the demand that Ukraine become a permanent American colony. snyder.substack.com/p/recoup-the...

snyder.substack.com

"Recoup the costs"

The sadism of American policy to war-torn Ukraine

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Andy Shepherd @andyshepherd.bsky.social · 19/02/2025

In their latest update, the GLAMBIE Team show that the pace of glacier melting has increased by 36%. Community assessments are vital as they give non-experts the confidence to act on their findings. www.bbc.co.uk/news/article...

bbc.co.uk

Climate change: World's glaciers melting faster than ever recorded

The planet's glaciers have lost 5% of their ice in little over 20 years, according to a major study.

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British Antarctic Survey 🐧 @bas.ac.uk · 17/02/2025

Amid the majestic beauty of nature and the noble pursuit of science, the toilet tent can start to present pressing logistical issues... Today's ICEWORLD is all about a #polarscience investigation into ice shelf rifts and 'suture' ice on the Larsen C Ice Shelf ⬇️ podcasts.apple.com/gb/podcast/s...

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