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#permafrost — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #permafrost, aggregated by home.social.

  1. #Steady #Klimacrew

    Ein KI-Modell des #AWI soll helfen, den globalen #Kohlenstoffkreislauf besser zu verstehen – von den tropischen #Regenwälder​n 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.

    tino-eberl.de/nutzen-kuenstlic

    #Klimamodell #KINutzen #Retröt

  2. 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 #pergélisol

    Les gouffres béants de l'Arctique | Documentaire | ARTE - YouTube
    m.youtube.com/watch?v=Mp2ItCbY

  3. 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 #pergélisol

    Les gouffres béants de l'Arctique | Documentaire | ARTE - YouTube
    m.youtube.com/watch?v=Mp2ItCbY

  4. 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 #pergélisol

    Les gouffres béants de l'Arctique | Documentaire | ARTE - YouTube
    m.youtube.com/watch?v=Mp2ItCbY

  5. 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 #pergélisol

    Les gouffres béants de l'Arctique | Documentaire | ARTE - YouTube
    m.youtube.com/watch?v=Mp2ItCbY

  6. 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 #pergélisol

    Les gouffres béants de l'Arctique | Documentaire | ARTE - YouTube
    m.youtube.com/watch?v=Mp2ItCbY

  7. Rock Weathering Can Counteract River CO2 Emissions Induced By Permafrost Thaw
    --
    doi.org/10.1038/s41586-026-106 <-- shared paper
    --
    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…”
    --
    “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

  8. Permafrost Distribution, Degradation, And Potential Mass Movement Cascades In The Western Himalaya Using Machine Learning And Numerical Models
    --
    doi.org/10.1038/s44304-026-002 <-- shared paper
    --
    doi.org/10.1038/s41598-025-220 <-- shared (earlier) paper
    --
    doi.org/10.1080/2150704X.2025. <-- shared (earlier) paper
    --
    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

  9. Eine Aufteilung von Projekten auf zwei oder mehrere "Teilprojekte" scheint die neue Masche zu sein um die notwendige #UVP (#Umweltverträglichkeitsprüfung) ganz oder zumindest teilweise zu erfüllen. Das scheint bei der #TIWAG immer öfter vorkommen.

    Auftauender #Permafrost, Rückzug von Gletschern und immer instabilere Berghänge dank #Klimakrise bringt immer öfter Probleme oder Gefahren. #Stauseen im hochalpinen Gelände sind davon besonders betroffen.
    Zu den Gefahren wird es womöglich zu einer Gutachterschlacht kommen.

    Die Wasserableitung aus dem #Ötztal ist offenbar nach wie vor fix eingeplant. Das werden sie allerdings nie bekommen. Nie!

    "Flutwelle ins #Kaunertal als Klima-Worst-Case"
    tirol.orf.at/stories/3296414/

    #Klimakatastrophe #KaunertalAusbauStoppen #KaunertalKraftwerkStoppen