#permafrost — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #permafrost, aggregated by home.social.
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RE: https://mstdn.ca/@Windspeaker/117208692427380234
PQP "oxidação" de rios!
"O degelo deste solo [o permafrost], causado pelo aquecimento global, gera erosão, libera resíduos tóxicos em lagoas e rios, ameaça liberar microrganismos perigosos, assim como potenciais emissões de carbono retidos no gelo há milhares de anos.
Esse solo congelado está presente sob grandes partes do Alasca, Canadá e Sibéria, onde comunidades indígenas vivem, trabalham e caçam há centenas de anos e sofrem lentamente os impactos do aumento da temperatura global.
O degelo da camada de permafrost remodela paisagens, desloca vilas inteiras e fragiliza habitats de animais."
https://reporterbrasil.org.br/2025/11/o-que-e-permafrost/
#permafrost #climate #crimatecrisis #indigenas #environment -
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 -
Risiko für irdische „Heißzeit steigt
Klimaforscher warnen: Destabilisierung des Klimasystems wird wahrscheinlicher#Klimaforscher warnen: Das #Erdklima könnte dem Übergang zu einer neuen #Heißzeit näher sein als gedacht. Denn durch die zunehmende #Erwärmung und steigenden #Treibhausgas'werte hat sich das Risiko für ein Umkippen mehrerer Stellschrauben im #Klimasystem weiter erhöht. Positive #Rückkopplungen und #Fernwirkungen über Kontinente hinweg könnten dann einen #Kaskadeneffekt auslösen, der das Erdklima destabilisiert. Dann könnte die Erde in einen neuen Zustand geraten, der nach menschlichen Zeitmaßstäben irreversibel ist – eine Heißzeit.
Einige der Klima-Stellschrauben könnten schon jetzt in ein neues Gleichgewicht gekippt sein. „Dies ist der Fall bei den Eisschilden #Grönland's und der #Westantarktis, für den borealen #Permafrost und die #Berggletscher“, berichten die Forscher. Auch der #Amazonas-#Regenwald stehe kurz vor dem Umkippen.
https://www.scinexx.de/news/geowissen/risiko-fuer-irdische-heisszeit-steigt/
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The Arctic Just Experienced Its Warmest Year on Record
The past 10 years have been the warmest recorded in a region that is heating at two to four times the global average.https://murica.website/2025/12/the-arctic-just-experienced-its-warmest-year-on-record/
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Permafrost Formation In A Meandering River Floodplain
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https://doi.org/10.1029/2024AV001175 <-- shared paper
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“... KEY POINTS:
• River meandering resets permafrost development and vegetation succession by eroding old floodplain areas and depositing new land
• On the Koyukuk River, permafrost rapidly forms in new deposits, but it takes over 4 Kyr to develop to its full areal extent of 85%
• The rate of permafrost formation is likely linked to vegetation succession on younger and overbank deposition on older floodplain areas…”
#water #hydrology #permafrost #development #research #Alaska #river #stream #watercourse #channel #meandering #vegetation #spatialanalysis #erosion #floodplain #overbank #deposition #sedimentation #KoyukukRiver #riverdynamics #climate #climatechange #Arctic #environment #landform #geomorphology #dating #spatiotemporal #model #modeling #network #GIS #spatial #mapping -
Aujourd'hui, c'est #BandcampFriday, le label #Permafrost offre 20% sur tout son catalogue, avec le code 𝐛𝐚𝐲𝐫𝐨𝐮𝐞𝐱𝐩𝐥𝐨𝐬𝐢𝐨𝐧 :
https://lesdisquesdupermafrost.bandcamp.com/
De quoi découvrir et aimer #RienVirgule
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Kinematic Evolution Of A Large Paraglacial Landslide In The Barry Arm Fjord Of Alaska
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https://doi.org/10.1029/2023JF007119 <-- shared paper
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https://doi.org/10.5066/P9EUCGJQ <-- shared technical article
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https://www.sciencebase.gov/catalogMaps/mapping/ows/5fff561ed34e592d8671ee85?service=wms&request=getcapabilities&version=1.3.0 <-- shared web mapping service
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#GIS #spatial #mapping #massmovement #landslide #engineeringgeology #remotesensing #sitespecific #LiDAR #iFSAR #paraglacial #kinematics #mapping #monitoring #spatialanalysis #spatiotemporal #fedscience #risk #hazard #glacier #retreat #climatechange #Alaska #BarryArm #fjord #hazardassessment #tsunami #wave #BarryGlacier #change #sensors #fieldwork #surveillance #melting #permafrost #Whittier #geophysics #geology #Alaska #geomorphometry #deglaciating
@USGS -
Climate Change Mitigation: Planting Trees in Artic Worsens Global Warming
Forest restoration and tree plantation is a well-established strategy for mitigation of climate change............
#Arctic #Carbon #CarbonDioxide #Carbonemission #climate #Climateaction #ClimateChange #CO2 #forest #GlobalWarming #permafrost #Treeplantation #UmeshPrasad
Umesh Prasad -
Ontdekking van de eeuw: perfect bewaard wolharige neushoorn gevonden in siberische permafrost https://www.trendingtech.news/trending-news/2024/09/39057/ontdekking-van-de-eeuw-perfect-bewaard-wolharige-neushoorn-gevonden-in-siberische-permafrost #wolharige neushoorn #permafrost #Siberië #uitgestorven soorten #wetenschappelijke ontdekking #Trending #News #Nieuws
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The #Batagay or #Batagaika crater in Siberia often referred to as the "Doorway to the Underworld" or the
"Gateway to Hell" is a
#permafrost #megaslump in Yakutia, Russia.Dimensions vary by source, but the site covers around 192 acres (78 hectares)
and stretches two thirds of a mile (one kilometer) in length.Logged of trees in the 1960s, its walls reach a depth of around 180 feet (55 meters)
and expose 650,000 years of geologic history.Since first spotted in the 1960s by surveillance satellites, the crater has grownfrom an insignificant gully to a massive depression at an accelerating rate.
According to Sarah Cadieux, Sr. Lecturer and Associate Director of Environmental Science of Rensselaer Polytechnic Institute,
the crater area increased by almost three times from 1991 to 2018.The Batagaika crater isn’t a crater at all,
it’s a #retrogressive #thaw #slump, a type of terrain called #thermokarst that occurs in areas underlain by permafrost.No longer cooled by forest cover, the slump has become a self-sustaining #feedback #loop,
a portion of the ecosystem which has tipped into a new state.This is not an isolated case, but rather a rapidly growing problem in the Arctic as
💥it warms three to four times the rate of the rest of the planet since 1979.Called Arctic or polar #amplification, this phenomenon is a well established fact measured by instruments,
confirmed in climate computer models,
and reinforced by paleoclimate records.Powerful anecdotal evidence occurred in the scorching heatwave of 2020 that saw the Russian town of Verkhoyansk
which lies north of the Arctic Circle hit a stunning 38° C (100.4° F) on June 20.2020 also saw overall temperatures in the Siberian basin rise to nearly 11° F above normal,
shocking scientists and releasing #ancient #methane
not from ancient organic material,
but from #limestone.Elevated methane in wetlands was expected, but not from #outgassing #rock.
A year later in 2021 Europe’s climate change service Copernicus Sentinel satellites recorded 118° F (48° C) in the Sakha Republic of Arctic Siberia,
and records continue to fall with temperatures over 100° F in 2023 as reported by CNN. -
Eilisessä Kokkolan Talviharmonikan konsertissa kantaesitettiin Cecilia Damströmin haitarikonsertto Permafrost, ikirouta, https://areena.yle.fi/podcastit/1-67590395
Ihan kiva kuunneltuna. Oli kuulimma kuvaakin mukana, ja sitten tietysti selitystä (etenkin perästäpäin). Solistina toimi Sonja Vertainen, ja Keski-Pohjanmaan kammariorkesteria johti Jan Söderblom.
Tuo kappale alkaa 25 minuutin ja päättyy 44:n kieppeillä.
#konsertti #harmonikka #haitari #hanuri #kurttu #ensiesitys #yle #concert #premiere #permafrost #ikirouta
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" #PacmanViren im #Permafrost Die Seuche aus dem #Eis ist für #Menschen ungefährlich - #vorerst "
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Hello #Fediverse !
An #Introduction post from the scientists behind the #PolarPortal - a danish collaboration between the Danish Meteorological Institute, the Danish Technical University and GEUS with accurate near real-time #Climate data on the state of the #cryosphere in the #Arctic.
Follow us for data + visualisations of #ArcticSeaIce #Weather #GreenlandIceSheet #SMB and #GRACE / #GRACEFO mass budget as well as #permafrost +#Iceberg processes -
Arctic Report Card 2022 [NOAA]
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https://youtu.be/_WbWjLUTvZM <-- shared 2021 video
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https://youtu.be/MDG-moe0tZs <-- shared 2022 video
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https://arctic.noaa.gov/Report-Card/Report-Card-2022 <-- shared 2022 report
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#NOAA #ArcticReportCard #GIS #spatial #mapping #arctic #environmental #people #airtemperatures #temperatures #climatechange #impacts #land #ocean #birds #ecosystems #wildlife #fish #fisheries #coastal #coastalcommunities #permafrost #changes #events #change #seaice #warming #impactassessment #environmentalimpact #environmentalmonitoring #extremeweather #engineering #risk #hazard #community #communityimpact #snow #resources #icesheet #melting #satellite #remotesensing
#NOAA -
@crossgolf_rebel
🌿 Da gab es zuletzt so einige Artikel in der #taz 🐾 zum Thema #Moore & #Moorschutz
Auf dieser Seite im Überblick:
https://taz.de/!t5037393/
"Wer Moorböden schützen will, bekommt Streit um die Ressource Land. Für wen ist der Boden da? Für den Straßenverkehr, zum Beispiel für die teils gebaute, teils noch in Planung befindliche Küstenautobahn #A20 🛣️, die auch #Moorgebiete zerstört? Für die intensive Landwirtschaft (...)?"
@PaulaToThePeople
#Klimapolitik #Permafrost #Torf #torffrei -
Update to this thread: new Norlisk-related industrial contaminations in the #arctic
sea (expand thread to read full discussion):Melting permafrost behind the worst spill in Arctic history[2]:
"A vast Arctic state, Russia is warming 2.5 times faster than the world average.
Sixty-five percent of the country is covered by permafrost and the environment ministry warned in 2018 that the melt threatens pipes and structures, as well as buried toxic waste, which can seep into waterways.
Northern regions have also rung the alarm, with the eastern Arctic Yakutia area for years lobbying Moscow to pass legislation protecting permafrost.
Environmentalists said the spill was the worst such accident ever in the Arctic region and the second worst in modern Russian history.
The Ambarnaya River, which is affected by the spill, feeds into Lake Pyasino, a major body of water and the source of the Pyasina River that is vitally important to the entire Taimyr peninsula.
Satellite images released by the European Space Agency and Russia's Roscosmos show a large spot of reddish fuel had traveled over 20 kilometers toward the lake from the spill site.
Russia's fisheries agency and some environmentalists have said that the floating barriers erected on the river by responders are unable to stop the majority of the pollution, which can quickly dissolve or sink.
The spill also polluted 180,000 square meters of land before reaching the river, regional prosecutors said.
The area has been pummeled by decades of pollution from metals production and other industrial activity in Norilsk, Russia's most polluted city.
World Wildlife Fund expert Alexei Knizhnikov said local residents have long since stopped fishing in the river.
He added that despite damage to permafrost, the disaster could have been avoided if the company followed the rules, such as erecting a barrier around its fuel reservoir to contain spillage."
#Permafrost #Russia #EcoDisaster