Referenced link: https://phys.org/news/2023-05-atmospheric-rivers-linked-greenland-ice.html
Discuss on https://discu.eu/q/https://phys.org/news/2023-05-atmospheric-rivers-linked-greenland-ice.html

Originally posted by Phys.org / @physorg_com: http://nitter.platypush.tech/physorg_com/status/1654137819755839491#m

#Atmosphericrivers linked to melting #Greenlandicesheet @UWMadison @NatureComms https://www.nature.com/articles/s41467-023-37434-8 https://phys.org/news/2023-05-atmospheric-rivers-linked-greenland-ice.html

After reading this I think I have a better understanding of what tipping points are and which, scarily enough, have been passed. The evidence had been stacking up for a while that sea level rise is locked and this paper clarifies why.

Climate Dominoes | Breakthrough https://www.breakthroughonline.org.au/climatedominoes
#sealevelrise #gis #greenlandicesheet #climatechange #climateemergency #climatecrisis #wais

"Global warming has reached the top of the #Greenland Ice Sheet
Air temperatures at the Greenland ice sheet have been reconstructed with unprecedented quality from an array of ice cores. The analysis shows that modern temperatures are 1.5 °C warmer than those of the 20th Century, and that this warming has been accompanied by increased run-off of Greenland meltwater.

Here we show that the warming in the recent reconstructed decade exceeds the range of the pre-industrial temperature variability in the past millennium with virtual certainty (P < 0.001) and is on average 1.5 ± 0.4 degrees Celsius (1 standard error) warmer than the twentieth century. Our findings suggest that these exceptional temperatures arise from the superposition of natural variability with a long-term warming trend, apparent since ad 1800. The disproportionate warming is accompanied by enhanced Greenland meltwater run-off, implying that anthropogenic influence has also arrived in central and north Greenland, which might further accelerate the overall Greenland mass loss."

https://www.nature.com/articles/s41586-022-05517-z

#GlobalWarming #Climate #ClimateCrisis #Arctic #GreenlandIceSheet

I'll present our work on "Reduced mass loss from the #GreenlandIceSheet under stratospheric aerosol injection" tomorrow 8 March, 15:15-15:35 JST at the Seventh International Symposium on Arctic Research (ISAR-7 https://www.jcar.org/isar-7/, session R4 "Ice Sheets, Glaciers and Ice Cores").

#Geoengineering, contentious topic!

#ISAR7 #SICOPOLIS #ElmerIce

"Exceeding 1.5°C global warming could trigger multiple climate tipping points - Climate tipping points are conditions beyond which changes in a part of the climate system become self-perpetuating. These changes may lead to abrupt, irreversible, and dangerous impacts with serious implications for humanity. Armstrong McKay et al. present an updated assessment of the most important climate tipping elements and their potential tipping points, including their temperature thresholds, time scales, and impacts. Their analysis indicates that even global warming of 1°C, a threshold that we already have passed, puts us at risk by triggering some tipping points. This finding provides a compelling reason to limit additional warming as much as possible."
...
"Observations have revealed that parts of the West Antarctic ice sheet may have already passed a tipping point. Potential early warning signals of the Greenland ice sheet, Atlantic Meridional Overturning Circulation, and Amazon rainforest destabilization have been detected. Multiple abrupt shifts have been found in climate models. Recent work has suggested that up to 15 tipping elements are now active."

https://www.science.org/doi/10.1126/science.abn7950

#Climate #ClimateCrisis #TippingPoints #Amazon #AMOC #AMOCCollapse #GreenlandIceSheet #WestAntarcticIceSheet #WAIS #fff

"As resistance grows to the fossil fuel regime, laws are springing up everywhere to suppress climate activists - The climate crisis accelerates. Anti-protest laws proliferate. - These developments are not unrelated.
...
Why, despite all the warnings, does the world keep hurtling towards destruction? Well, the environmental economist Aviel Verbruggen estimates that the fossil fuel industry generated profits of US$2.8bn each and every day for the last 50 years.
...
You might have seen the new report by the World Meteorological Society, the one warning about humanity entering what UN secretary general António Guterres calls ‘“uncharted territory of destruction”. As emissions exceed pre-pandemic levels, the planet is now as likely as not to face temperatures more than 1.5C above pre-industrial measurements (the limit the UN COP26 summit pledged to avert) within the next five years.

A separate study in Science speculates that key ecological tipping points (including ice sheet collapses and the disruption of a major north Atlantic ocean current) may have already been passed.

The stakes could not be higher for the planet and its people. But they’re also immense for the corporate polluters, with the biggest companies collectively projected to develop new oil and gas fields to the tune of US$932bn by the end of 2030 – and an eye-popping US$1.5tn by 2040."
https://www.theguardian.com/commentisfree/2022/sep/19/as-resistance-grows-to-the-fossil-fuel-regime-laws-are-springing-up-everywhere-to-suppress-climate-activists

#Climate #ClimateCrisis #SurveillanceState #Capitalism #ClimateProtests #fff #FossilFuels #BigOil #TippingPoints #Greenland #GreenlandIceSheet #AMOC #AMOCCollapse

This is so not good: “Global warming is spiking in one of the world’s coldest places, atop the 2-mile thick ice sheet in central Greenland, where new research shows that the first decade of the 2000s was clearly the warmest 10 years on record in at least 1,000 years.” 😳

#ClimateCrisis #GreenlandIceSheet #GlobalWarming #ClimateActionNow

One of the World’s Coldest Places Is now the Warmest it’s Been in 1,000 Years, Scientists Say - Inside Climate News https://apple.news/A3fBa5NHLTnC7PaqxP3EJSg

I guess an implication of this might be that increasing melt and hence subglacial disposal will contribute to increased seasonal acceleration?

Sady, #NotOpenAccess.

'Seasonal acceleration of Petermann Glacier, Greenland, from changes in subglacial hydrology'

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL098009?af=R

#GlacialHydrology
#PetermannGlacier
#Cryosphere
#GreenlandIceSheet

Workshop "The stability of the #Greenland #IceSheet: Lessons from the past"
April 19-21, 2023, Bergen, Norway (plus option for online viewing)

Themes:
ice-sheet surface (atmospheric forcing, Holocene and longer records of climate forcing);
ice-sheet margins (ice-ocean interactions);
ice-sheet base (basal processes and archives of ice sheet history from the bed under and beyond the ice).
http://www.glyfac.buffalo.edu/Faculty/briner/2023greenlandworkshop/

#GreenlandIceSheet

(From #CRYOLIST https://cryolist.org 2022-12-12)

Workshop "The stability of the #Greenland #IceSheet: Lessons from the past"
April 19-21, 2023, Bergen, Norway (plus option for online viewing)

Themes:
ice-sheet surface (atmospheric forcing, Holocene and longer records of climate forcing);
ice-sheet margins (ice-ocean interactions);
ice-sheet base (basal processes and archives of ice sheet history from the bed under and beyond the ice).
http://www.glyfac.buffalo.edu/Faculty/briner/2023greenlandworkshop/

#GreenlandIceSheet

(From #CRYOLIST https://cryolist.org 2022-12-12)

Workshop "The stability of the #Greenland #IceSheet: Lessons from the past"
April 19-21, Bergen, Norway (plus option for online viewing)

Themes:
ice-sheet surface (atmospheric forcing, Holocene and longer records of climate forcing);
ice-sheet margins (ice-ocean interactions);
ice-sheet base (basal processes and archives of ice sheet history from the bed under and beyond the ice).
http://www.glyfac.buffalo.edu/Faculty/briner/2023greenlandworkshop/

#GreenlandIceSheet

(From #CRYOLIST https://cryolist.org 2022-12-12)

Referenced link: https://phys.org/news/2022-12-radar-scans-greenland-ice-sheet.html
Discuss on https://discu.eu/q/https://phys.org/news/2022-12-radar-scans-greenland-ice-sheet.html

Originally posted by Phys.org / @physorg_com@twitter.com: https://twitter.com/physorg_com/status/1599795780625235968#m

Radar scans of the #Greenlandicesheet reveal the shutdown and reconfiguration of ice streams @NatureGeosci https://phys.org/news/2022-12-radar-scans-greenland-ice-sheet.html

Today I am mostly concerned about the #GreenlandIceSheet and #GlobalWarming. More tomorrow, when I publish on my Substack. #climateemergency

#AmitavGhosh made me senstive how #DavidBahr talks of the #GreenlandIceSheet as a living thing, trying to recover and regulate itself. In #GreatDerangement and #NutmegsCurse Ghosh gets us to see the landscape, mountains, forests.. as makers of meaning,: participants in stories. There are a lot of little mountain shrines in Japan, and sacred little spots by the seas. Maybe we all need a place we choose as a center, and refuse to let it be sold or damaged. Gotta read #BecomingNativeToThisPlace.