#permafrost — Public Fediverse posts

Le Tribunal du Net: Un #animal congelé depuis 24 000 ans dans le #Permafrost en #Sibérie se #réveille et se #reproduit en laboratoire !

https://www.letribunaldunet.fr/science/animal-congele-24000-ans-siberie-reveille.html

Challenges In The Use Of Local Data For Regional Scale Mapping Of C And N Stocks In The Continuous Permafrost Zone At The Yukon Coastal Plain | Heatwave Risks To Tipping Point Of Permafrost
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https://doi.org/10.5194/soil-12-113-2026 <-- shared paper
--
https://doi.org/10.1038/s41558-026-02603-2 <-- shared paper
--
https://www.theguardian.com/environment/2026/aug/20/tipping-points-heatwaves-wildfires-permafrost-climate-crisis <-- shared media article
--
https://www.cbc.ca/news/canada/north/permafrost-slumps-herschel-island-qikiqtaruk-yukon-9.7168780 <-- shared media article
--
[putting together two different ‘sorts’/focuses of research/reporting, but…]
H/T @gustaf Hugelius | Professor at Stockholm University
--
“Permafrost soils are particularly vulnerable to climate change. To assess and improve estimations of carbon (C) and nitrogen (N) budgets it is necessary to accurately map soil carbon and nitrogen in the permafrost region. In particular, soil organic carbon (SOC) stocks have been predicted and mapped by many studies from local to pan-Arctic scales. Several studies have been carried out at the Canadian Beaufort Sea coast, though no regional maps of terrestrial carbon stocks based on spatial modelling has been conducted yet. This study combines available field data from the Canadian Yukon coastal plain and uses it to map regional SOC and N stocks using the machine learning algorithm random forest and environmental variables based on remote sensing data. [The authors] developed models using the data for the entire region and separate models for the coastal mainland area and Qikiqtaruk Herschel Island. Each model was used to map SOC and N stocks for its respective area. [They] assessed the performance of the different random forest models by using crossvalidation. [They] further assessed model results using the Area of Applicability (AOA) method and the quantile regression forest approach, comparing the results and discussing their implications within the context of both methods. [They] explore[d] local differences in soil properties and how soil data distribution across the region affects the accuracy of the predictions of SOC and N stocks..."
#permafrost #soils #geology #climatechange #temperature #thawing #melting #emissions #CO2 #methane #carbon #nitrogen #GIS #spatial #mapping #Qikiqtaruk #HerschelIsland #Yukon #Canada #soilorganiccarbon #SOC #arctic #cryosphere #BeaufortSea #coast #coastal #machinelearning #model #modeling #remotesensing #earthobservation #carbonstocks #island #mainland #spatialanalysis #scale

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
https://m.youtube.com/watch?v=Mp2ItCbYmhU

Rock Weathering Can Counteract River CO2 Emissions Induced By Permafrost Thaw
--
https://doi.org/10.1038/s41586-026-10664-8 <-- 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

Rock Weathering Can Counteract River CO2 Emissions Induced By Permafrost Thaw
--
https://doi.org/10.1038/s41586-026-10664-8 <-- 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

Rock Weathering Can Counteract River CO2 Emissions Induced By Permafrost Thaw
--
https://doi.org/10.1038/s41586-026-10664-8 <-- 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

Rock Weathering Can Counteract River CO2 Emissions Induced By Permafrost Thaw
--
https://doi.org/10.1038/s41586-026-10664-8 <-- 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

Rock Weathering Can Counteract River CO2 Emissions Induced By Permafrost Thaw
--
https://doi.org/10.1038/s41586-026-10664-8 <-- 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

Warming unlocks ancient carbon in Tibetan permafrost, triggering climate tipping point

The results revealed a clear and troubling pattern across all warming levels. Even under low to moderate warming, #carbon losses through respiration outpaced photosynthetic carbon gains by 1–16-fold.

Warming by +1°C, +2°C, and +4°C increased annual net #CO2 release by 44%, 80%, and 176%, respectively, and the site was a net carbon source before any experimental warming began.

"When warming reaches around 2–4°C, the system changes fundamentally," Ding told Phys.org. "Plants begin to reach their thermal and water-stress limits, so photosynthesis declines. At the same time, thaw penetrates deeper into the #soil, exposing old #permafrost carbon that has been frozen and protected for hundreds to thousands of years. Once thawed, microbes can decompose it and release it as CO2."

https://phys.org/news/2026-06-ancient-carbon-tibetan-permafrost-triggering.html

#TippingPoint
#Tibet
#Himalaya
#Uhhps

Des #chercheurs de #Marseille ont #décongelé un morceau de #permafrost #sibérien vieux de 30 000 ans : le #virus qu’ils ont réveillé à l’intérieur était encore capable d’infecter

https://sciencepost.fr/des-chercheurs-de-marseille-ont-decongele-un-morceau-de-permafrost-vieux-de-30-000-ans-ce-qu-ils-ont-reveille-a-l-interieur-etait-encore-capable-d-infecter/

Häppchen #Klimawissen: Wie bedroht die globale Erwärmung das arktische #Meereis?

Im Winter friert das #Polarmeer zu und im Sommer taut es teilweise wieder auf. Das war seit Jahrhunderten so. Doch wird das #Nordpolarmeer im Sommer bald eisfrei sein? Etwas #Einsteigerwissen zur #Arktis und den dortigen Veränderungen durch den #Klimawandel. 🧊🌍

https://www.oekologisch-unterwegs.de/klimawandel/937-klimawandel-kippelemente-verlust-des-eises-am-nordpol.html

#Meereis #Erderwärmung #Umweltschutz #Eisschmelze #NASA #Klimaforschung #Permafrost #Treibhausgase

5.000 Jahre eingefrorenes Bakterium ist ein „Superkeim“. Aufgetautes Höhlenbakterien erweist sich als immun gegen zehn moderne Antibiotika. #Antibiotika #Antibiotikaresistenz #multiresistent #Bakterien #Permafrost
https://www.scinexx.de/news/biowissen/5-000-jahre-eingefrorenes-bakterium-ist-ein-superkeim/

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
--
#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

The Arctic Just Experienced Its Warmest Year on Record

https://murica.website/2025/12/the-arctic-just-experienced-its-warmest-year-on-record/

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

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

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

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

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

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

Arctic Report Card 2022 [NOAA]
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https://youtu.be/_WbWjLUTvZM <-- shared 2021 video
--
https://youtu.be/MDG-moe0tZs <-- shared 2022 video
--
https://arctic.noaa.gov/Report-Card/Report-Card-2022 <-- shared 2022 report
--
#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