#Antarctic #seaice #tippingpoint

Original article (paywalled, log in to your local university library to read)

Abram et al. 20 August 2025, Nature 644, 621–633

Emerging evidence of abrupt changes in the Antarctic environment

https://www.nature.com/articles/s41586-025-09349-5

Emerging evidence of abrupt changes in the Antarctic environment - Nature

Abrupt changes are developing across Antarctica’s ice, ocean and biological systems; some of these changes are intensifying faster than equivalent Arctic changes, potentially irreversibly, and their interactions are expected to worsen other impacts across the Antarctic environment and global climate system.

Nature

#Antarctic #seaice #tippingpoint

Original open access article

Doddridge et al. 01 July 2025, PNAS Nexus, Volume 4, Issue 7, July 2025, pgaf164

Impacts of Antarctic summer sea-ice extremes

https://doi.org/10.1093/pnasnexus/pgaf164

#Antarctic #seaice #tippingpoint

Original article (paywalled, log in to your local university library to read)

Abram et al. 20 August 2025, Nature 644, 621–633

Emerging evidence of abrupt changes in the Antarctic environment

https://doi.org/10.1038/s41586-025-09349-5

#FYI #PaulBeckwith video lecture and literature review #Antarctic #seaice #tippingpoint

"Clearly, since 2015, we have crossed a tipping point in the climate system with collapse of Antarctic sea ice. A new, peer-reviewed paper came out yesterday, to this effect."

https://www.youtube.com/watch?v=K4QqJhyJtr0

#climate #ClimateScience #climatechange #ClimateEmergency #ClimateCrisis #ClimateBreakdown #ClimateDisruption #globalWarming #globalHeating #ExtremeWeather

Abrupt Loss of Antarctic Sea Ice is OBVIOUSLY a Climate Tipping Point

YouTube

Rapid loss of Antarctic ice may be climate tipping point, scientists
say

Rapid loss of Antarctic sea ice could be a tipping point for the global climate, causing sea level rises, changes to ocean currents and loss of marine life that are impossible to reverse, a scientific study published
, opens new tab on Thursday said.
The paper in the journal Nature aimed to describe in previously unseen detail the interlocking effects of global warming on the Antarctic, the frozen continent at the planet's South Pole.

#Antarctic #ice #ClimateChange #tippingpoint #wildlife

https://www.reuters.com/sustainability/cop/rapid-loss-antarctic-ice-may-be-climate-tipping-point-scientists-say-2025-08-20/

6:10am Tipping Point by Michael Dease from Reaching Out
#MichaelDease #TippingPoint #JazzNetwork #KUVO

The International Energy Agency (IEA) forecasts that solar and wind will meet more than 90% of the global increase in electricity demand this year. Global generation from solar and wind energy is expected to increase by about 25%, from 4,000 terawatt-hours to more than 5,000. Next year it is expected to jump another 20%, past 6,000TWh.

#climateChange #climateCatastrophe #climateEmergency #climateBreakdown #tippingPoint

https://www.theguardian.com/environment/commentisfree/2025/aug/20/voices-arguing-climate-crisis-action-is-a-waste-of-time-are-wrong

Voices arguing that climate action is a waste of time are getting louder. Here’s why they are wrong

Optimism may be hard to come by, but the evidence shows some progress on emissions is not just possible – it’s happening before our eyes

The Guardian

Polar microbes influence ice melt and global climate. Ice-darkening microbes nudge up temperatures and accelerate melt, exposing more nutrient-rich debris that encourage the growth of yet more microbes, which darken the surface further still.

#climateChange #climateCatastrophe #climateEmergency #climateBreakdown #tippingPoint

https://www.theguardian.com/world/2025/aug/15/arctic-glaciers-face-terminal-decline-as-microbes-accelerate-ice-melt

Arctic glaciers face ‘terminal’ decline as microbes accelerate ice melt

Scientists in Svalbard in race to study polar microbes as global heating threatens fragile glacial ecosystems

The Guardian

See auf Gletscher sprengt Risse in Grönlands Eis

Ein See aus #Schmelzwasser hat laut einer Studie tiefe Risse ins grönländische Eis gesprengt. Abfließendes Wasser hebe einen #Gletscher an, teilte das Forschungsteam des Alfred-Wegener-Instituts (#AWI) aus Bremerhaven mit. Der 79-Grad-Nord-Gletscher zeige erste Anzeichen, instabiler zu werden.

Laut den Wissenschaftlerinnen und Wissenschaftlern geht das grönländische Eis seit Mitte der 1990er Jahre zurück, nur noch drei schwimmende Zungen sind übrig. Eine davon ist der #79GradNordGletscher. Auf der Oberfläche des Gletschers sammelt sich zunehmend Schmelzwasser. Daraus entstand ein See, der heute etwa 21 Quadratkilometer groß ist.

Immer wieder brach Wasser des Sees abrupt durch das Eis und floss über Risse und Schächte ab, wie das Forschungsteam mitteilte. So gelangten enorme Mengen an Wasser an den Rand der Gletscherzunge Richtung Ozean. Die Wissenschaftler beobachteten sieben solcher Entwässerungen, vier davon in den vergangenen fünf Jahren.

Gletscher droht instabiler zu werden
Seit 2019 bilden sich dabei laut AWI besonders auffällige, dreieckige #Bruchfelder im #Eis, die jahrelang sichtbar bleiben. Einige Risse formen Kanäle mit mehreren Dutzend Meter breiten Öffnungen, durch die das Wasser an die Basis des #Eisschild's gelangt. Die Risse und Kanäle verändern sich zwar im Inneren des Eises, bleiben aber lange bestehen. Ob der Gletscher jemals zu seinem früheren Zustand zurückkehrt, ist unklar.

Das Forschungsteam stellte fest, dass Wasser durch die Risse bis unter den Gletscher gelangte. Dort staute sich das Wasser zu einem unterirdischen See. Radarbilder zeigen, dass sich auf diesem See unter dem Eis offenbar eine Blase gebildet hat, die den Gletscher an dieser Stelle nach oben drückt.

https://orf.at/stories/3402602/

#kryosphäre
#TippingPoint
#Kipppunkt
#Grönland

Studie: See auf Gletscher sprengt Risse in Grönlands Eis

ORF.at

"Our projections suggest that if current trends continue, the Amazon system could reach a critical tipping point within this century. Deforestation & decreased rainfall may transform the Amazon from a lush rainforest to a more arid, savanna-like landscape. Our findings highlight the urgent need to limit deforestation and mitigate climate change in order to ensure the long-term health and stability of the Amazon rainforest"

#Amazon #Rainforest #TippingPoint #ClmateChange

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL108304