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#permafrost

1 post1 participant0 posts today
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CEN Uni Hamburg

New study from #CLICCS researcher Jakob Deutloff finds no strong evidence for a tipping point chain reaction from carbon-cycle elements like #permafrost or the #Amazon.
However, 9 of 16 tipping points could still be crossed under current policies.
#Climate action remains key. 🧪 cliccs.uni-hamburg.de/about-cl @MPI_Meteo @uniofexeter @gsi_exeter@bird.makeup

University of Hamburg · New study on tipping points offers hope while warning against inactionBy Thomas Merten
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Nonilex

#Arctic #warming could pose a threat to America’s #security too: #Alaska may have new vulnerabilities to both #China & #Russia; changes in #ocean salinity & temp might interfere w/ #submarine detection systems; extremes of climate change, including #permafrost thaw in Russia, may drive #economic #instability, social #unrest, & territorial claims. [#Trump #Intelligence Agencies excluded #ClimateChange from the annual #ThreatAssessment report for the first time in decades — too *woke*]

#Greenland
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Sune Auken

@MartinStendel

Bio:

Climate scientist at #DMI.

Coordinator of PolarPortal (lots of up-to-date Arctic data) and ROPEWALK (huge Danish logbook digitization project together with @rigsarkivet).

#ClimateChange in the Arctic, in particular #Greenland and in Africa, in particular #Tanzania.

Modelling subsea #permafrost.

Conveying science to the public: #IKFF #IKlimaforskernesFodspor #BestilEnForsker

🇪🇺 with dual citizenship 🇩🇰 and 🇩🇪 and (occasionally) tooting in three languages.

Replied in thread
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HistoPol (#HP) 🏴 🇺🇸 🏴

Cc @rahmstorf

#ClimateCrisis:+2.7-3.1•C--Our children and grandchildren still alive in 2100 are so f*cked!

(1/2)

By #bneIntelliNews

"The disappearance of #SeaIce and the melting of the #permafrost in northeast #Russia will lead to unpredictable results. Global #weather patterns will be drastically altered, while 👉the melting of the permafrost will release gigatonnes of #CO₂ into the atmosphere almost overnight, that has been locked in the #ice...

fediscience.org/@rahmstorf/113

FediScience.orgProf. Stefan Rahmstorf (@rahmstorf@fediscience.org)What happens in the Arctic doesn't stay in the Arctic. It affects you. https://www.intellinews.com/arctic-set-to-undergo-irreversible-damage-as-hopes-of-hitting-the-1-5c-paris-target-fade-366175/
Public
O=C=O

Groundwater in the Arctic is delivering more carbon into the ocean than was previously known

A relatively small amount of #groundwater trickling through #Alaska's #tundra is releasing huge quantities of #carbon into the #ocean, where it can contribute to #ClimateChange, according to new research out of The University of Texas at Austin.
As the tundra continues to thaw and the flow of submarine groundwater ratchets up, Demir said that the outflow of carbon from shore to sea could effectively make ocean surface waters a carbon source to the #atmosphere. The #CO2 released via groundwater could also contribute to ocean #acidification.
"The #Arctic coast is changing in front of our eyes," said Bayani Cardenas, a co-author of this study and professor at the Jackson School's Department of Earth and Planetary Sciences. "As #permafrost thaws, it turns into coastal and submarine #aquifers. Even without this thawing, our studies are among the first to directly show the existence of such aquifers."

phys.org/news/2025-01-groundwa

#ClimateScience
#ClimateCrisis
#Cryosphere

Micaela Pedrazas (left) and Cansu Demir (right) install a piezometer along the beach of Kaktovik Lagoon. Credit: Bayani Cardenas / Jackson School of Geosciences
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Chris Merle

Melting #permafrost is bad, mmkay.

Iron and sulfite minerals are now leaching into once pristine arctic rivers, acidifying them. One the sulfur acidifies the water it begins to leach toxic compounds and elements into the rivers. It was more commonly seen in rivers where abandoned mines were nearby.

North America's Ongoing, Ignored Disaster

m.youtube.com/watch?v=Lxfpgqn6

YouTubeNorth America's Ongoing, Ignored DisasterBy GeologyHub
#globalWarming#acidification#ClimateChange
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Gehtso

Muss die Schweiz Alpendörfer aufgeben?

ach, das ist doch in der Schweiz.
Das ist doch weit weg, was geht es die C-Parteien an.

/s

Die Wissenschaft hat schon vor längerem davor gewarnt das einige Teile von Europa in absehbarer Zeit für den Menschen unbewohnbar werden.

Siehe , Spanien und jetzt auch in der Alpenregion.

Aber der Fritze findet Windräder ja hässlich.

tagesschau.de/ausland/europa/s

tagesschau.de · Muss die Schweiz wegen der Erderwärmung Alpendörfer aufgeben?By Matthias Ebert
#Klimakatastrophe#Europa#Dürre
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💧🌏 Greg Cocks

Permafrost - A Central Hub For Permafrost Information In Canada.
--
geo.ca/communities/permafrost/
--
“As #GeographyAwarenessWeek approaches, it's the perfect time to highlight Canada’s permafrost - a crucial component of our northern ecosystems that plays a key role in shaping both our environment and infrastructure.
[You are] invite[d] to discover GEO.ca’s new Permafrost Community space, a go-to resource for anyone interested in learning more about permafrost thawing and its impacts across Canada…”
#Permafrost #GeoDiscovery #ClimateChange #GIS #spatial #mapping #arctic #spatialanalysis #spatiotemporal #geography #canada #spatiotemporal #northern #ecosystems #infrastructure #change #damage #carbon #carbonstorage #environment #foodweb #melt #melting

map - permafrost and carbon stored in peat, Canada
photo - helicopter landed on melting permafrost, Canada
photo - researchers measuring thawing permafrost on Herschel Island, a few kilometres off the Yukon coast. Dramatic changes to landscapes in the North could be accelerated by the permafrost carbon feedback loop.
aerial image - The Mackenzie River system is Canada’s largest watershed, and the tenth largest water basin in the world. Parts of the watershed sit atop permafrost, making it vulnerable to climate change. Approximately 40 per cent of Canada’s landmass overlays permafrost.
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Nonilex

But a new study published Wed in the journal #Nature shows that blowing past #climate goals is more dangerous than it originally seemed. Even if temperatures come back down to 1.5°C, the authors found, many climate impacts — like rising #SeaLevels & thawing #permafrost — will persist for centuries to millennia.

#ClimateCrisis #ClimateScience #GlobalWarming #ExtremeWeather #VoteBlue
nature.com/articles/s41586-024

NatureOverconfidence in climate overshoot - NatureAiming for declining global temperatures can limit long-term climate risks compared with a mere stabilization of global warming, including sea-level rise and cryosphere changes.
Public
ombra

New study

Abrupt increase in Arctic-Subarctic wildfires caused by future #permafrostthaw

,"... we find that projected rapid #permafrost thaw leads to massive #soil drying, surface warming, and reduction of relative humidity over the #Arctic-Subarctic region. These combined processes lead to nonlinear late-21st-century regime shifts in the coupled soil-hydrology system and rapid intensification of #wildfires in western #Siberia and #Canada."

nature.com/articles/s41467-024

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CelloMom On Cars

"A study, published by an international team of climate scientists and permafrost experts shows that, according to new climate computer model simulations, global warming will accelerate #permafrost thawing and as a result lead to an abrupt intensification of #wildfires in the Subarctic and Arctic regions of northern Canada and Siberia."

phys.org/news/2024-09-climate-

Phys.org · Climate models predict abrupt intensification of northern wildfires due to permafrost thawingBy Institute for Basic Science
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Prof. Tatiana Ilyina

Acceleration of #climatechange is taking place due to our failure to cut increasing CO2 emissions.

Any impact of Arctic coastal #permafrost erosion on the global #climate through increasing atmospheric CO2 concentrations until 2100 is comparatively small.

Yet, this new #EarthSystemModel component allows for a better quantification of the carbon budget, necessary for carbon monitoring under #decarbonisation .

Read more in this press release 👇
uni-hamburg.de/en/newsroom/pre
#ilyinaScience

www.uni-hamburg.deIn years to come, the Arctic Ocean will absorb less CO2 than expected
Public
Prof. Tatiana Ilyina

In a #newpaper from my group, led by David Nielsen, we incorporated coastal permafrost as a new component of an #EarthSystemModel.

This allowed us to quantify that #coastal #permafrost erosion weakens the Arctic Ocean #CO2 uptake from the atmosphere by 7-14%.

This exerts a positive biogeochemical feedback on #climate, increasing atmospheric CO2 by 1–2 TgC yr−1 per °C of increase in global surface air temperature.

Find out more here👇
nature.com/articles/s41558-024
#ilyinaScience

A figure displaying changes in CO2 uptake due to erosion of coastal permafrost from Nielsen et al. 2024. a, Annual changes in the Arctic Ocean’s uptake of atmospheric CO2 due to coastal permafrost erosion. The shading represents the range of uncertainty stemming from varying OM permafrost characteristics in our simulations, while the solid line represents the mean response. b, Total Inner Arctic Ocean CO2 uptake without coastal erosion (lines) and with coastal erosion (shade). c, Evolution of the Inner Arctic Ocean’s sea-ice area.
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