#permafrost — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #permafrost, aggregated by home.social.
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#Permafrost ist ein wichtiges Puzzleteil im Ökosystem der #Arktis: Er speichert Kohlenstoff über lange Zeiträume und bietet festen, stabilen Grund. Schmilzt das Eis, entstehen sogenannte Thermokarstseen.
AWI-Forschende haben nun die Datenbank "Lost Lakes" aufgebaut, die wichtige Informationen über den Zustand von Thermokarstseen der Arktis bereitstellt. Das ermöglicht es, Veränderungen in den Permafrostlandschaften zu erkennen, sobald sie passieren.
Foto:Ingmar Nitze
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#Permafrost ist ein wichtiges Puzzleteil im Ökosystem der #Arktis: Er speichert Kohlenstoff über lange Zeiträume und bietet festen, stabilen Grund. Schmilzt das Eis, entstehen sogenannte Thermokarstseen.
AWI-Forschende haben nun die Datenbank "Lost Lakes" aufgebaut, die wichtige Informationen über den Zustand von Thermokarstseen der Arktis bereitstellt. Das ermöglicht es, Veränderungen in den Permafrostlandschaften zu erkennen, sobald sie passieren.
Foto:Ingmar Nitze
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#Permafrost ist ein wichtiges Puzzleteil im Ökosystem der #Arktis: Er speichert Kohlenstoff über lange Zeiträume und bietet festen, stabilen Grund. Schmilzt das Eis, entstehen sogenannte Thermokarstseen.
AWI-Forschende haben nun die Datenbank "Lost Lakes" aufgebaut, die wichtige Informationen über den Zustand von Thermokarstseen der Arktis bereitstellt. Das ermöglicht es, Veränderungen in den Permafrostlandschaften zu erkennen, sobald sie passieren.
Foto:Ingmar Nitze
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#Permafrost ist ein wichtiges Puzzleteil im Ökosystem der #Arktis: Er speichert Kohlenstoff über lange Zeiträume und bietet festen, stabilen Grund. Schmilzt das Eis, entstehen sogenannte Thermokarstseen.
AWI-Forschende haben nun die Datenbank "Lost Lakes" aufgebaut, die wichtige Informationen über den Zustand von Thermokarstseen der Arktis bereitstellt. Das ermöglicht es, Veränderungen in den Permafrostlandschaften zu erkennen, sobald sie passieren.
Foto:Ingmar Nitze
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#Permafrost ist ein wichtiges Puzzleteil im Ökosystem der #Arktis: Er speichert Kohlenstoff über lange Zeiträume und bietet festen, stabilen Grund. Schmilzt das Eis, entstehen sogenannte Thermokarstseen.
AWI-Forschende haben nun die Datenbank "Lost Lakes" aufgebaut, die wichtige Informationen über den Zustand von Thermokarstseen der Arktis bereitstellt. Das ermöglicht es, Veränderungen in den Permafrostlandschaften zu erkennen, sobald sie passieren.
Foto:Ingmar Nitze
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Nebraska scientists link Nepal flood to climate change
OMAHA, Neb. (WOWT) – Two weeks after flooding in Nepal, CNN reports thousands of people are still missing.…
#Climate #ClimateChange #Climate-Change #climatechange #climatechangeNepal #glacialmelt #globalwarming #Himalayanglaciermelt #Nebraskaclimatescientists #Népal #Nepalflashflood #OmahaNepalesecommunity #permafrost #Tíbet
https://www.europesays.com/3244673/ -
RE: https://idw-online.social/@idw_online/117246752406809548
Vanishing Lakes
New Data Platform for #Arctic #Permafrost LakesResearchers at the Alfred Wegener Institute have developed the "Lost Lakes" database, which provides important information on the status of Arctic #thermokarst lakes - both in real time and over extended periods.
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RE: https://idw-online.social/@idw_online/117246752406809548
Vanishing Lakes
New Data Platform for #Arctic #Permafrost LakesResearchers at the Alfred Wegener Institute have developed the "Lost Lakes" database, which provides important information on the status of Arctic #thermokarst lakes - both in real time and over extended periods.
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RE: https://idw-online.social/@idw_online/117246752406809548
Vanishing Lakes
New Data Platform for #Arctic #Permafrost LakesResearchers at the Alfred Wegener Institute have developed the "Lost Lakes" database, which provides important information on the status of Arctic #thermokarst lakes - both in real time and over extended periods.
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https://www.europesays.com/ch/127981/ Not just Nepal: How climate change puts European Alps under threat of glacial retreat and rock fall #Alps #ClimateChange #EnvironmentalImpact #EuropeanAlps #GlacialRetreat #glaciers #MontBlanc #permafrost #RockFall
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Ein KI-Modell des #AWI soll helfen, den globalen #Kohlenstoffkreislauf besser zu verstehen – von den tropischen #Regenwäldern bis zum tauenden #Permafrost.
Komplexe Rückkopplungen im #Erdsystem sollen besser erfasst und fundiertere Prognosen ermöglicht werden. Mit großen Datenmengen, etwa der #Erdfernerkundung und Biomasse-Infos, wird das Modell trainiert.
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The threatening thaw: climate professor on heatwave risks to tipping point of permafrost https://www.theguardian.com/environment/2026/aug/20/tipping-points-heatwaves-wildfires-permafrost-climate-crisis #ManMadeClimateChange #permafrost #TippingPoint #BigOilKnew #ClimateChange
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En Sibérie, avec la fonte du pergélisol, d’étranges cratères apparaissent dans la toundra. Un phénomène alarmant dont les conséquences pour le #climat pourraient être dramatiques.
#nature #biodiversite #rechauffementclimatique #ecologie #science #scientifiques #documentaire #Arte
#artique #permafrost #pergélisolLes gouffres béants de l'Arctique | Documentaire | ARTE - YouTube
https://m.youtube.com/watch?v=Mp2ItCbYmhU -
Rock Weathering Can Counteract River CO2 Emissions Induced By Permafrost Thaw
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https://doi.org/10.1038/s41586-026-10664-8 <-- shared paper
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H/T @aaron Bufe
“[The researchers] measured carbon emissions and water chemistry in 50 headwater rivers draining 780,000 km² of the Tibetan Plateau.
The rivers flow in landscapes underlain by continuous permafrost and landscapes in which the permafrost has retreated since the last glacial maximum. They collect[ed] organic carbon from soils and dissolved inorganic carbon that is fixed by rock-weathering.
Where the permafrost cover is continuous, rivers emit CO2 from degrading (permafrost) soil carbon. Weathering reactions in these catchments are relatively slow.
In landscapes with (almost) no permafrost, carbon fluxes from weathering are faster than CO2 emissions from rivers.
Thus, as permafrost landscapes transition to landscapes without permafrost cover, chemical weathering reactions may play an ever more important role in riverine carbon cycling.
Interestingly, weathering can affect the carbon cycle in different ways. Where sulfide minerals are present, weathering reactions can emit CO2. Where silicate minerals dominate, weathering draws down CO2 from the atmosphere…”
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“Climate-induced permafrost thaw unlocks large stores of organic carbon that are mineralized and emitted as carbon dioxide (CO2) from rivers to the atmosphere. Concurrently, warming and permafrost thaw can increase mineral weathering rates, thus affecting the release and sequestration of inorganic carbon. Yet how these biological and geological carbon cycles interact and jointly affect CO2 dynamics (emission compared with drawdown) in permafrost rivers remains unknown. Here [they] combine[d] CO2 emissions, organic and inorganic solute concentrations, dual carbon isotopes (δ13C–Δ14C) and geochemical modelling to infer how permafrost thaw may affect river biogeochemistry over decades to centuries across the Qinghai–Tibet Plateau. Leveraging a gradient of thermal permafrost degradation, we find that river CO2 emissions decline, whereas solute fluxes from rock weathering increase with decreasing permafrost cover. Across this region, net CO2 drawdown fluxes from rock weathering are about 35% of river CO2 emissions, varying from around 15% in catchments with continuous permafrost to more than 100% in catchments with discontinuous or isolated permafrost. Thus, carbon fluxes from chemical weathering may become increasingly important with ongoing permafrost thaw, potentially even outpacing river CO2 emissions. [Their] findings disentangle the interplay between biological and geological carbon fluxes that are important for the cryosphere and the global carbon cycle…”
#permafrost #melting #thaw #climatechange #warming #Tibet #TibetanPlateau #Qinghai #water #hydrology #carbonemissions #CO2 #emissions #waterchemistry #waterquality #cryosphere #sediment #sedimentation #weathering #rock #carbon #river #riverine #carboncyling #geochemistry #biology #geology #soil -
Permafrost Distribution, Degradation, And Potential Mass Movement Cascades In The Western Himalaya Using Machine Learning And Numerical Models
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https://doi.org/10.1038/s44304-026-00217-4 <-- shared paper
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https://doi.org/10.1038/s41598-025-22051-w <-- shared (earlier) paper
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https://doi.org/10.1080/2150704X.2025.2488532 <-- shared (earlier) paper
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H/T @abhinav Alangadan
“Can we develop a first-order understanding of permafrost degradation and glacial lakes exposed to degradation-induced mass movements in the Himalaya?
[The authors] tried to address this question. The study [first link above] integrates machine learning, statistical modeling, and numerical modeling to investigate high-resolution permafrost distribution, potential degradation, and associated mass-movement hazards in the Kinnaur district of Himachal Pradesh, India.
Using rock glaciers as proxies, [they] generated a high-resolution permafrost distribution using machine learning, while potential degradation zones were delineated using the 0°C isotherm as a first-order indicator. [They] further identified glacial lakes located near potentially degrading permafrost zones and reconstructed their bathymetry. A detailed scenario-based GLOF process-chain simulation was then carried out for Kashang Lake using r.avaflow and HEC-RAS.
[Their] results indicate that seven glacial lakes in #Kinnaur are located close to potentially degrading permafrost zones. The simulations further show that a potential GLOF from Kashang Lake could inundate critical downstream infrastructure, including nearly 11 km of National Highway 5…”
#permafrost #distribution #GIS #spatial #mapping #Himalayas #India #Kinnaur #HimachalPradesh #KashangLake #massmovement #engineeringgeology #machinelearning #AI #model #modeling #numericalmodel #glaciallakes #glaciet #glacial #glaciallakeoutburstflood #GLOF #cryosphere #geostatistics #rockglaciers #GeoAI #bathymetry #processchainsimulation #HECRAS #avaflow #risk #hazard #mitigation #riskassessment #infrastructure #HEP #publicsafety #downstream #avalanche -
1-Apr-2026
A Wisconsin-sized chunk of #Alaska's #permafrost is thawing; #Arctic and global #climate may never be the same
When permafrost is perma-lost, the global #carbonCycle is altered and coastal #ecosystems are affectedhttps://www.eurekalert.org/news-releases/1121619 #science #environment #ecology #climateCatastrophe
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Okay, dann ist die nächste #Pandemie wohl von einer #Bakterie:
Ein 5.000 Jahre eingefrorenes #Bakterium aus einer rumänischen #Eishöhle zeigt Resistenz gegenüber zehn #Antibiotika.
Forschende fanden mehr als 100 #Resistenzgene, die beim Auftauen in die Umwelt gelangen und heutige Erreger stärken könnten.
https://www.scinexx.de/news/biowissen/5-000-jahre-eingefrorenes-bakterium-ist-ein-superkeim/
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A Decade of Post-Fire Succession Amplifies the Effect of Wildfire on the Surface Radiation Balance and Permafrost Thaw in Subarctic Peatlands
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https://doi.org/10.1002/ppp.70016 <-- shared paper
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#permafrost #thaw #Canada #NWT #NorthwestTerritories #wildfire #postfire #peatlands #ScottyCreek #vegetation #tree #toppling #geomorphology #cryosphere #geomorphetry #warming #winter #summer #climatechange #subarctic #arctic #monitoring #measurements #TaigaPlains #ecoregion #blackspruce #processes #landcover -
Frozen No More - A Case Study Of Arctic Permafrost Impacts Of Oil And Gas Withdrawal
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https://doi.org/10.1038/s41598-024-76292-2 <-- shared paper
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#GIS #spatial #mapping #remotesening #earthobservation #oil #gas #oilandgas #O&G #energy #extraction #drilling #exploration #subsurface #permafrost #melting #humanimpacts #climatechange #oilextraction #risk #hazard #riskassessment #water #hydrology #sediment #tundra #oilwellpads #NorthSlope #Alaska #arctic #spatialanalysis #spatiotemporal #remediation #drillpad #oilpad #lease #industry #habitat #ecosystem #fieldwork #sampling #geology #engineeringgeology #impact -
Rückkopplungen im #Kohlenstoffkreislauf – etwa durch tauenden #Permafrost – könnten selbst bei moderaten #Emissionen eine stärkere #Erderhitzung verursachen als bisher gedacht.
Eine Studie des #PIK betont, dass das 2-Grad-Ziel nur bei sehr niedrigen Emissionen und geringer #Klimasensitivität erreichbar bleibt. Langfristige Modelle machen deutlich, dass heutige Entscheidungen über Jahrhunderte wirken.
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Permafrost Thaw Threatens Up To 3 Million People In The Arctic
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https://phys.org/news/2025-01-permafrost-threatens-million-people-arctic.html <-- shared technical article
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https://doi.org/10.1038/s43247-024-01883-w <-- shared paper
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#GIS #spatial #mapping #arctic #climatechange #permafrost #thaw #communities #impacts #humanimpacts #infrastructure #risk #hazard #northernhemisphere #global #threat #Sweden #greenland #alaska #yukon #russia #canada #norway #landuse #melting #ecosystems #livelihoods #firstnation #indigenous #inhabitants #population #cost #economics #policymaking #planning #management #spatialanalysis #adapation #transportation #supplies #waterquality #watersecurity #foodsecurity #disease #contaminants #multifactor #analysis #MFA #social #culture #cultural #transdisciplinary #ground #temperature #physicalprocesses #consequences #mobility #supplies #biogeochemical #water #hydrology #engineeringgeology #erosion #ecosystem #FATE -
L’incipiente disastro in Alaska dei fiumi che si tingono d’arancione
https://www.jacoporanieri.com/blog/?p=41572
#ambiente #ecologia #alaska #fiumi #problemi #mutamento #clima #scioglimento #ghiaccio #artico #permafrost #inquinamento #veleni #contaminazione #disastri #antropocene #territorio #statiuniti #dalmondo #geologia #idrologia
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Ungewöhnlich hohe #Temperaturen und #Schneearmut haben mglw. einen massiven #Felssturz am #MonteRosa in #Italien verursacht. #Gesteinsmassen rollten hunderte Meter ins Tal.
Glücklicherweise geschah das Unglück nachts, sodass keine Verletzten gemeldet wurden. Experten vermuten schmelzenden #Permafrost als Ursache. Die Bergrettung warnt vor weiteren Abstürzen und rät dringend, das Gebiet um die Pedriola-Alm zu meiden. #Klimawandel #Bergsicherheit #Alpen
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Tundra Vegetation To Grow Taller, Greener Through 2100, Nasa Study Finds
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https://landsat.gsfc.nasa.gov/article/tundra-vegetation-to-grow-taller-greener-through-2100-nasa-study-finds/ <-- shared technical article
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https://doi.org/10.1038/s43247-024-01454-z <-- shared paper
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#GIS #spatial #mapping #model #modeling #climatechange #Alaska #Yukon Alaska #Canada #Scandinavia #Russia #boreal #borealforests #forests #vegetation #tundra #permafrost #remotesensing #satellite #ICESat2 #landsat #spatialanalysis #spatiotemporal #forecast #biome #landscape #canopy #transitional #canopycover #ABoVE #forest #hydrobasins #water #hydrology #taiga #canopyheight #cimp6 #SSP #bioclimate
@nasa -
Thomsen River Estuary, Banks Island [NASA Earth Observatory Daily Image]
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https://earthobservatory.nasa.gov/images/147560/thomsen-river-estuary-banks-island <-- link to NASA Earth Observatory image
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[photos in the main from 2015]
#GIS #spatial #mapping #remotesensing #OLI #hydrology #water #sediment #arctic #ocean #climatechange #ArcticOcean #landsat #landsat8 #BanksIsland #Aulavik #ice #snow #permafrost #tundra #Canada #ThomsenRiver #estuary #sedimentation #erosion #braiding #braided #hydrodynamics #geochemistry #geology #acidification
@nasa -
Weird. Maybe, I've got a logical mistake in my thinking
Will #Steffen et al 2018 https://www.pnas.org/doi/10.1073/pnas.1810141115 warned in "Trajectories of the Earth System in the Anthropocene" of a "Hot House Earth" .
A term that got negative press all over and the paper is still discredited in public opinion among the non-scientific community, at least.
A Hot House Age is merely the term for an ice-less age in which the poles are not covered by kilometres of ice. That is called an Ice House Age.#Talento et al 2021 https://esd.copernicus.org/articles/12/1275/2021/ modelled what happens to ice ages #glacial |s in several emission scenarios.
Today's CO2 concentration is already moving the next #iceage to later than what the #Milankovic cycles would dictate.
Scenarios for (in my opinion fictitious, unachievable) emissions of 1000 or 3000 Pg C move the next fullblown ice age to 600ky and 900ky from now.
Almost a million years. No ice age.But the #AMOC is going to collapse: the convection in the Subpolar Gyre in the 2030s; the Northern branch of AMOC might tip before 2050 to later inevitably collapse, too.
Certainly that increases ice mass in Greenland, Europe, and Eurasia, and Arctic Sea Ice grows back, too. And all this AMOC-related ice grows and grows, each year puts more snow on the ever increasing ice layer.
I don't know how much ice is needed to meet criteria for a glacial definition.
But all that Eurasian ice also buries the boreal forests under it, ie removes their carbon from the cycle. And puts an ice plug on leaking methane from #permafrost in that area. (Tho not the permafrost in the far East. I gather, that area is not prone to ice sheets from Atlantic influences and needs other triggers to form? It wasn't covered by ice in #MIS11, 420ky ago. )Weird isn't it, that ice mass models like Talento's don't factor in ever-increasing ice mass in low-to medium emission scenarios. Hm.
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CW: 📰 Klimaforskere om isens hastige smelten: Dette vanvid kan og må ikke fortsætte
> »Nu er det nok. Det er tid at trække en streg i sneen: I lyset af hvad vi har lært om kryosfæren, siden Parisaftalen blev vedtaget i 2015, er 1,5 grader ikke blot at foretrække frem for to grader. Det er den eneste mulighed.«
Læs, eller lyt til, hele artiklen (læsetid: 6 minutter):
🎁 https://www.information.dk/udland/2023/11/klimaforskere-isens-hastige-smelten-vanvid-kan-maa-fortsaette?kupon=eyJpYXQiOjE3MDA1NjU5MTUsInN1YiI6IjE3NDE4MTo4MDc0MzEifQ.9J-SU97f9vhB9rJQQmHQRQ (gavelink: artiklen kan læses uden abonnement)
#antarktis
#arktis
#BritishAntarcticSurvey
#COP28
#Copernicus
#CopernicusECMWF
#ECMWF
#globalOpvarmning
#havstigning
#ICCI
#InternationalCryosphereClimateInitiative
#IPCC
#klimaforskning
#klimapanel
#kryosfære
#NatureClimateChange
#Parisaftalen
#permafrost
#temperaturmål
#økosystem -
#FossilAdventCalendar Day 22 (delayed due to time with the family)
Our first #fossil from north of the #Arctic Circle is from the most iconic of #IceAge #megafauna. This woolly #mammoth, Mammuthus primigenius, was found over a century ago in the far #north of Siberia and gifted to Paris' #MuseumNationalD'HistoireNaturelle by the tsar. Like the squirrel featured yesterday, this mammoth was partially preserved in #permafrost; you can see its #mummified face and leg in the case at the right.
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#FossilAdventCalendar Day 21 (delayed by a busy travel day)
As we move towards the far #North we encounter one of the (literally) coolest kinds of #fossilization. When the #frozen ground known as #permafrost forms, it can #freeze dry #animals buried in it. This ground #squirrel, Urocitellus undulatus from #Alaska 🇺🇸 and displayed in the #AmericanMuseumOfNaturalHistory, burrowed into the ground in life and was #mummified by it after death, providing a remarkable window into life in the #IceAge.