Lmst

Arctic sea ice extent at record low levels

#Arctic #ClimateChange #Cryosphere #SeaandLakeIce

▶️ 1 new picture from Copernicus https://commons.wikimedia.org/wiki/File:Arctic_sea_ice_extent_at_record_low_levels_%28Copernicus_2025-12-22%29.png

Arctic_sea_ice_extent_at_record_low_levels_(Copernicus_2025-12-22).png

Rapid Mass Movements Triggered By An Atmospheric River In Disko Island, West Greenland
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https://doi.org/10.1002/esp.70201 <-- shared paper, 2023 event(s)
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https://doi.org/10.1007/s10346-022-01922-7 <-- shared paper, 2021 event(s)
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https://www.polarresearch.at/the-great-landslide-of-assapaat/ <-- shared technical article
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#landslide #massmovement #thawing #permafrost #extremewweather #cryosphere #Qeqertarsuaq #ArcticDEM #DiskoIsland #Greenland #ERA5 #CARRA #fluvial #pluvial #precipitation #rainfall #snow #ice #glacier #glacial #temperature #slushflow #GIS #spatial #mapping #geomorphology #elevation #slope #atmosphericriver #climate #weather #snowmelt #island #coast #coastal #damage #humanimpacts #infrastructure #arctic #monitoring #geohazard #risk #hazard #engineeringgeology #polar #change #remotesensing #spatialanalysis #spatiotemporal #earthobservation #debrisflow #remoteareas
#GreenlandEcosystemMonitoring | @europeanspaceagency | #CopernicusECMWF #Copernicus

Past And Future Change In Global River Flows
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https://doi.org/10.1038/s43017-025-00745-z <-- shared paper
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#review #water #hydrology #spatialanalysis #spatiotemporal #waterresources #model #modeling #flow #global #watercycle #humanimpacts #climate #extremeweather #seasonal #dynamics #changes #riverflow #regional #fluvial #pluvial #cryosphere #climatemodel #climatechange #anthropogenic #landuse #watermanagement #model #modeling #terrestrial #ecosystems

#Earlycareer talk at #AGU25 Wednesday:
Erica Lucas
Widespread Seismic Tremor in Greenland’s Fjords
S32B-08 17Dec, 356 CC 11:40-11:50
(with Yajing Liu & @natalyagomez)

Water (and heat) transport through Greenland's glacial fjords to tidewater glaciers is sparsely measured. They find seismic tremor from coastal, land-based seismometers corresponds to modelled periods of turbulent water flow and standing eddies in these fjords.

#Cryosphere #Greenland #Seismology #McGillUniversity #UCSantaCruz

Two figures from an upcoming publication (Erica Lucas, lead author) linking seismic tremors to turbulent water flow in Greenland. The upper figure is a map of the Ilulissat Icefjord (Jakobshavn) with the location of the seismometer and the azimuth of the received tremors. The lower figure shows the seasonal variation in the tremors (pink, smoothed in light blue) compared to the modelled water exchange (black, smoothed yellow)

Peak Glacier Extinction In The Mid-Twenty-First Century
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https://doi.org/10.1038/s41558-025-02513-9 <-- shared paper
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“📉 KEY FINDINGS
• At +4 °C, only ~18,000 glaciers remain worldwide by 2100
• At +1.5 °C, ~100,000 glaciers survive
• [They] identif[ed] “Peak Glacier Extinction”:
– ~2041 at +1.5 °C (~2,000 glaciers lost per year)
– ~2055 at +4 °C (~4,000 glaciers lost per year)
🏔️ THE ALPS
• At +2.7 °C, only ~110 glaciers remain by 2100.
• At +4 °C, this drops to just ~20.
Can you imagine the Alps with almost no glaciers left?...”
#model #modeling #global #glacier #loss #glacial #cryosphere #spatialanalysis #spatiotemporal #GloGEM #OGGM #PyGEM #extinction #climate #climatechange #globalwarming #water #hydrology #freshwater #surfacewater #count #metrics #volume #thickness #size #sealevelrise #tourism #culture #usecase #waterresources #Alps #TheAlps #worldwide #melted #melting

Early career presenter at #AGU25 Tuesday:
B Parazin
Ice Sheets Without Dynamic Topography
PP23A-03 16Dec, (214 CC) 14:35-14:45
(Natalya Gomez's group at #McGillUniversity)

Dynamic topography is a deviation from isostatic equilibrium driven by mantle flow. Modelling results suggest that the choice of a dynamic topography model may be as important as the choice of climate model when simulating paleo ice sheet configurations of the last 5 million years.
#Cryosphere #Antarctica #Greenland

Figure 1 from
Parazin, B., Gomez, N., Richards, F., Hoggard, M.J., Coulson, S.,& Mitrovica, J. (2025) Icesheets without dynamic topography. Geophysical Research Letters, 52, e2025GL115332.https://doi.org/10.1029/2025GL115332

Effect of removing the present‐day predicted signal of the optimal dynamic topography model from Antarctica.

Sub-figures (d)The initial ice thickness following the pre-industrial modern spin up, and (e)final ice thickness after isostatically self‐consistent dynamic topography removal.

International Mountain Day 2025: Retreating Glaciers of the Hoher Dachstein Massif, Austria

#Cryosphere #Floods #Glaciers #NaturalEvents #Nature

⏩ 2 new pictures from Copernicus https://commons.wikimedia.org/wiki/Special:ListFiles?limit=2&user=OptimusPrimeBot&ilshowall=1&offset=20251212120603

Flooding_after_Storm_Bram,_United_Kingdom_(Copernicus_2025-12-12).png

International_Mountain_Day_2025-_Retreating_Glaciers_of_the_Hoher_Dachstein_Massif,_Austria_(Copernicus_2025-12-11).png

Glacier melt feeds rivers that nourish forests, wetlands, farms and cities. But with shrinking ice, seasonal rhythms change and water availability becomes unpredictable for people and wildlife alike. On International Mountain Day, we celebrate the richness and fragility of mountain ecosystems and spotlight the need for climate action, habitat protection, and respect for the cultures tied to these heights.

#Glacierwatch #InternationalMountainDay #Biodiversity #ClimateAction #IYGP #Cryosphere

Greenhouse gases projected to sharply increase extreme flooding in Central Himalayas

Rising #GreenhouseGas #emissions could see the size of extreme f#loods in the Central #Himalaya's increase by between as much as 73% and 84% by the end of this century.

Geographers at Durham University, UK, simulated the risk of increased flooding on the Karnali River, which spans #Nepal and #China and has the potential to impact communities in Nepal and #India.

They found that extreme floods—those with a 1% chance of happening within a year—could increase in size by 22% and 26% between 2020 and 2059, compared to flooding seen in the region between 1975 and 2014.

This increase is expected to be 37–43% between 2060 and 2099 with medium greenhouse gas emissions. High greenhouse gas emissions could see the size of extreme floods increase by between 73% and 84% in the same period.

https://phys.org/news/2025-12-greenhouse-gases-sharply-extreme-central.html

#CliamteCatastrophe
#GLOF
#Cryosphere

Graham Land, Antarctica

#Antarctic #Cryosphere #MarineEnvironment

▶️ 1 new picture from Copernicus https://commons.wikimedia.org/wiki/File:Graham_Land%2C_Antarctica_%28Copernicus_2025-12-08%29.png

Graham_Land,_Antarctica_(Copernicus_2025-12-08).png

Velocity And Calving Response Of A Major Greenland Ice Stream To A Lake Drainage Event
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https://doi.org/10.1038/s41561-025-01858-2 <-- shared paper
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#cryosphere #glacier #glacial #greenland #velocity #calving #remotesensing #earthobservation #GIS #spatial #mapping #GPS #GNSS #radar #SermeqKujalleq #Kangia #JakobshavnIsbræ) #KalaallitNunaat #icestream #spatialanalysis #spatiotemporal #GLOF #glaciallake #drainage #subglacial #flood #flooding #arctic #warming #climatechange #flowdynamics #numericalmodel #model #modeling #fieldobservation

Save the #cryosphere https://insideclimatenews.org/news/15112025/glacier-melt-earth-cryosphere/ Not to mention my article about #glaciers, #evolution and #Darwin https://nkozphoto.com/index.php/2025/09/05/glaciers-climate-change-and-darwins-legacy-in-chile/ #science #climate #chile #wildlife #whales

Continuous Monitoring Of A Glacier’s Extinction
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https://doi.org/10.1017/aog.2025.10024 <-- shared technical letter
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#GIS #spatial #ampping #spatialanalysis #spatiotemporal #glaciermassbalance # glaciermonitoring #supraglacial debris #glacier #extinction #glacial #monitoring #melting #climate #water #hydrology #cryosphere #Pizolgletscher #PizolGletscher #SwissAlps #Switzerland #massbalance #insitu #GLAMOS

Eastern Greenland at the start of winter

#Arctic #CoastalEnvironment #Cryosphere

▶️ 1 new picture from Copernicus https://commons.wikimedia.org/wiki/File:Eastern_Greenland_at_the_start_of_winter_%28Copernicus_2025-11-23%29.png

Eastern_Greenland_at_the_start_of_winter_(Copernicus_2025-11-23).png

International Association of Cryospheric Sciences (Glaciology 🗻)

The International Association of Cryospheric Sciences is the eighth association of the International Union of Geodesy and Geophysics. It was launched by the IUGG Council on 4 July 2007, developing from the Internati...

https://en.wikipedia.org/wiki/International_Association_of_Cryospheric_Sciences

#InternationalAssociationOfCryosphericSciences #Cryosphere #Glaciology #GeologySocieties #GeographicSocieties #EarthSciencesSocieties

COP30 information in the Cryosphere pavilion about Antarctica.

One of the speakers is Matt England, the bold guy when you scrub through the video. He speaks about the decline in bottom water formation, and how this affects ocean oxygen content everywhere. Also compares the speed in decline to that of the #AMOC : the Southern decline is double the speed.

Formation occurs right at the edges of Antarctica landmass.
At the surface, dense water is supposed to form when sea ice leaves behind cold, saline = dense water.
This then feeds a waterfall into the deep abyss, from where it gets transported around the continent and into all ocean basins.

But because #seaice formation at the 4 main edge-action points is hindered by multiple causes, the waterfall into the abyss gets less and less water.
When this deep circulation stops, when, not IF, it has disastrous consequences for the ocean life forms and for humanity at the end of the food chain.

The talk before Matt's is about #Antarctica seaice in general – not at those 4 main action points at the edge of the landmass.
"It flickers, then it tips", came to mind again. The loss in 2023 was the size of Argentina. Or Greenland.
For statistics buffs: a 7 sigma change.
Albedo loss is huge and now on par with Albedo loss from the Arctic sea ice loss.
And Antarctic loss now continues even once CO2-zero has been reached.

https://www.youtube.com/live/YjYkKvwW-Sw

#COP30 #Cryosphere #tippingpoints

The melting point of ice is non-negotiable. Shall we do something about #climatebreakdown, or not bother?
#Cryosphere #AMOC
https://iccinet.org/statecryo25/

Front cover of report 'State of the Cryosphere 2025': image along top left is edge of massive ice-sheet while to bottom right is a seaside town esplanade battered by high waves

Copernicus Sentinel-1D: a new EU satellite in orbit

#Cryosphere #HumanActivities #Land #LandMonitoring #NaturalEvents #Water

▶️ 1 new picture from Copernicus https://commons.wikimedia.org/wiki/File:Copernicus_Sentinel-1D-_a_new_EU_satellite_in_orbit_%28Copernicus_2025-11-05%29.png

Copernicus_Sentinel-1D-_a_new_EU_satellite_in_orbit_(Copernicus_2025-11-05).png

How does the #cryosphere shape our climate, and how do we track its changes? Dr. Erik Loebel from #C3S shares a first-hand account on monitoring glaciers, ice sheets, sea ice and permafrost, and why it matters.

The long Arctic night may seem distant, but its changes reach us all.
When the sun disappears up north, the clock is ticking for everyone.

#ArcticWinter #PolarNight #ClimateChange #Adaptation #Wildlife #Cryosphere

#cryosphere

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