Polar Melting: Difference between revisions

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=====Ice shelf collapses in previously stable East Antarctica=====

===== Meanwhile, Thwaites is not waiting around =====

[https://www.dailykos.com/stories/2025/1/22/2298597/-Meanwhile-Thwaites-is-not-waiting-around?pm_campaign=front_page&pm_source=trending&pm_medium=web by Jamess 22/1/25 DAILY KOS]

Yesterday’s Thwaites Crack Opened Up Today, and More Cracks Appear: Update

===== Melting glaciers and ice caps could unleash wave of volcanic eruptions, study says =====

[https://www.theguardian.com/environment/2025/jul/08/climate-crisis-melting-glaciers-ice-caps-volcanic-eruptions-chile-antartica-volcanoes by Damian Carrington 8/7/25 The Guardian]

The loss of ice releases the pressure on underground magma chambers and makes eruptions more likely. This process has been seen in Iceland, an unusual island that sits on a mid-ocean tectonic plate boundary. But the research in Chile is one of the first studies to show a surge in volcanism on a continent in the past, after the last ice age ended.

===== Glaciers will keep melting for centuries even if warming stops, study warns =====

[https://www.the-independent.com/climate-change/news/swiss-glacier-collapse-melting-b2761880.html by Stuti Mishra 3/6/25 INDEPENDENT]

About 40 per cent of the world's glacier mass is already set to disappear due to past greenhouse gas emissions. The ongoing loss not only contributes to sea-level rise but also threatens freshwater supplies and increases the risk of natural hazards in mountainous regions.

===== Gone with the glaciers: Researchers track unprecedented ice loss =====

[https://phys.org/news/2025-06-glaciers-track-unprecedented-ice-loss.html by Hakai Institute 25/6/25 PHYS ORG]

A study published in Geophysical Research Letters reveals that glaciers in western Canada, the United States, and Switzerland lost around 12% of their ice between 2021 and 2024.

===== Gone with the glaciers: Researchers track unprecedented ice loss =====

[https://phys.org/news/2025-06-glaciers-track-unprecedented-ice-loss.html by Hakai Institute 25/6/25 PHYS ORG]

A study published in Geophysical Research Letters reveals that glaciers in western Canada, the United States, and Switzerland lost around 12% of their ice between 2021 and 2024.

===== New maps show where snowfall is disappearing =====

[https://edition.cnn.com/2023/11/25/weather/snowfall-temperatures-climate-change-water/index.html by Eric Zerkel 25/11/23 CNN]

Snowfall is declining globally as temperatures warm because of human-caused climate change, a new analysis and maps from a NOAA climate scientist show.

===== Warming of +1.5 °C is too high for polar ice sheets =====

[https://www.nature.com/articles/s43247-025-02299-w by Chris R.Strokes 20/5/25 Communications earth & environment]

Global mean sea level (GMSL) increased by around 20 cm from 1901 to 2018, with the rate of change accelerating from ~1.4 mm year−1 (1901–1990) to ~3.7 mm year−1 (2006–2018)1 and, most recently, to 4.5 mm year−1 (2023)2. Several processes contribute to sea-level rise (SLR), but melting of glaciers and ice sheets is the dominant source, adding ~1.6 mm year−1 from 2006 to 2018, and now exceeding thermal expansion of the oceans (~1.4 mm year−1)1. Smaller mountain glaciers and ice caps dominated the cryosphere’s contribution to GMSL rise during the 20th Century1,3,4,5 and they will continue to shrink rapidly1,6, with profound impacts on water resources and human activities

#

===== Sea ice controls net ocean uptake of carbon dioxide by regulating wintertime stratification =====

[https://www.nature.com/articles/s43247-025-02395-x by Elise S.Droste 18/6/25 communications earth & environment]

Sea-air exchange of carbon dioxide in the Southern Ocean is strongly seasonal, with ocean uptake in summer, which is partly offset by carbon dioxide outgassing in winter. This seasonal balance can shift due to sea ice conditions, inducing interannual variability in the Southern Ocean carbon sink. A decade (2010–2020) of unique, year-round marine carbonate chemistry observations from the Rothera Time Series (West Antarctic Peninsula) reveals that interannual variability in seawater fugacity of carbon dioxide depends on wintertime processes.

===== Ice shelf collapses in previously stable East Antarctica =====

[https://apnews.com/article/climate-science-new-york-new-york-city-antarctica-4f5f1817bffd632e48e845d4638cc237 by By SETH BORENSTEIN March 25, 2022 AP NEws]

The collapse, captured by satellite images, marked the first time in human history that the frigid region had an ice shelf collapse. It happened at the beginning of a freakish warm spell last week when temperatures soared more than 70 degrees (40 Celsius) warmer than normal in some spots of East Antarctica. Satellite photos show the area had been shrinking rapidly the last couple of years, and now scientists wonder if they have been overestimating East Antarctica’s stability and resistance to global warming that has been melting ice rapidly on the smaller western side and the vulnerable peninsula.

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=====Warming Greenland ice sheet passes point of no return=====

AUGUST 13, 2020 by Laura Arenschield, The Ohio State University

[https://phys.org/news/2020-08-greenland-ice-sheet.html?fbclid=IwAR1y-PfgqdoOjD9gpuxCK31pjWhZKCL__o9UkZEOMerEICiT5NkcOOF_Nik ]

[https://phys.org/news/2020-08-greenland-ice-sheet.html?fbclid=IwAR1y-PfgqdoOjD9gpuxCK31pjWhZKCL__o9UkZEOMerEICiT5NkcOOF_Nik]

Nearly 40 years of satellite data from Greenland shows that glaciers on the island have shrunk so much that even if global warming were to stop today, the ice sheet would continue shrinking.

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=====A possible explanation for why West Antarctica is warming faster than East Antarctica=====

[https://phys.org/news/2020-06-explanation-west-antarctica-faster-east.html?fbclid=IwAR1dELgDVsZf-eoYNuh3CUXKBMW2eF0lr2vvOBcq_2V5vNiFR3HGwcxy_Vg ]

[https://phys.org/news/2020-06-explanation-west-antarctica-faster-east.html?fbclid=IwAR1dELgDVsZf-eoYNuh3CUXKBMW2eF0lr2vvOBcq_2V5vNiFR3HGwcxy_Vg]

=====A massive waterfall formed on Greenland's ice sheet. Here's why it matters=====

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@@ Line 8: / Line 8: @@
 }}
-=====Ice shelf collapses in previously stable East Antarctica=====
+===== Meanwhile, Thwaites is not waiting around =====
+[https://www.dailykos.com/stories/2025/1/22/2298597/-Meanwhile-Thwaites-is-not-waiting-around?pm_campaign=front_page&pm_source=trending&pm_medium=web by Jamess 22/1/25 DAILY KOS]
+ Yesterday’s Thwaites Crack Opened Up Today, and More Cracks Appear: Update
+===== Melting glaciers and ice caps could unleash wave of volcanic eruptions, study says =====
+[https://www.theguardian.com/environment/2025/jul/08/climate-crisis-melting-glaciers-ice-caps-volcanic-eruptions-chile-antartica-volcanoes by Damian Carrington 8/7/25 The Guardian]
+ The loss of ice releases the pressure on underground magma chambers and makes eruptions more likely. This process has been seen in Iceland, an unusual island that sits on a mid-ocean tectonic plate boundary. But the research in Chile is one of the first studies to show a surge in volcanism on a continent in the past, after the last ice age ended.
+===== Glaciers will keep melting for centuries even if warming stops, study warns =====
+[https://www.the-independent.com/climate-change/news/swiss-glacier-collapse-melting-b2761880.html by Stuti Mishra 3/6/25 INDEPENDENT]
+ About 40 per cent of the world's glacier mass is already set to disappear due to past greenhouse gas emissions. The ongoing loss not only contributes to sea-level rise but also threatens freshwater supplies and increases the risk of natural hazards in mountainous regions.
+===== Gone with the glaciers: Researchers track unprecedented ice loss =====
+[https://phys.org/news/2025-06-glaciers-track-unprecedented-ice-loss.html by Hakai Institute 25/6/25 PHYS ORG]
+ A study published in Geophysical Research Letters reveals that glaciers in western Canada, the United States, and Switzerland lost around 12% of their ice between 2021 and 2024.
+===== Gone with the glaciers: Researchers track unprecedented ice loss =====
+[https://phys.org/news/2025-06-glaciers-track-unprecedented-ice-loss.html by Hakai Institute 25/6/25 PHYS ORG]
+ A study published in Geophysical Research Letters reveals that glaciers in western Canada, the United States, and Switzerland lost around 12% of their ice between 2021 and 2024.
+===== New maps show where snowfall is disappearing =====
+[https://edition.cnn.com/2023/11/25/weather/snowfall-temperatures-climate-change-water/index.html by Eric Zerkel 25/11/23 CNN]
+ Snowfall is declining globally as temperatures warm because of human-caused climate change, a new analysis and maps from a NOAA climate scientist show.
+===== Warming of +1.5 °C is too high for polar ice sheets =====
+[https://www.nature.com/articles/s43247-025-02299-w by Chris R.Strokes 20/5/25 Communications earth & environment]
+ Global mean sea level (GMSL) increased by around 20 cm from 1901 to 2018, with the rate of change accelerating from ~1.4 mm year−1 (1901–1990) to ~3.7 mm year−1 (2006–2018)1 and, most recently, to 4.5 mm year−1 (2023)2. Several processes contribute to sea-level rise (SLR), but melting of glaciers and ice sheets is the dominant source, adding ~1.6 mm year−1 from 2006 to 2018, and now exceeding thermal expansion of the oceans (~1.4 mm year−1)1. Smaller mountain glaciers and ice caps dominated the cryosphere’s contribution to GMSL rise during the 20th Century1,3,4,5 and they will continue to shrink rapidly1,6, with profound impacts on water resources and human activities
+#
+===== Sea ice controls net ocean uptake of carbon dioxide by regulating wintertime stratification =====
+[https://www.nature.com/articles/s43247-025-02395-x by Elise S.Droste 18/6/25 communications earth & environment]
+ Sea-air exchange of carbon dioxide in the Southern Ocean is strongly seasonal, with ocean uptake in summer, which is partly offset by carbon dioxide outgassing in winter. This seasonal balance can shift due to sea ice conditions, inducing interannual variability in the Southern Ocean carbon sink. A decade (2010–2020) of unique, year-round marine carbonate chemistry observations from the Rothera Time Series (West Antarctic Peninsula) reveals that interannual variability in seawater fugacity of carbon dioxide depends on wintertime processes.
+===== Ice shelf collapses in previously stable East Antarctica =====
 [https://apnews.com/article/climate-science-new-york-new-york-city-antarctica-4f5f1817bffd632e48e845d4638cc237 by By SETH BORENSTEIN March 25, 2022 AP NEws]
   The collapse, captured by satellite images, marked the first time in human history that the frigid region had an ice shelf collapse. It happened at the beginning of a freakish warm spell last week when temperatures soared more than 70 degrees (40 Celsius) warmer than normal in some spots of East Antarctica. Satellite photos show the area had been shrinking rapidly the last couple of years, and now scientists wonder if they have been overestimating East Antarctica’s stability and resistance to global warming that has been melting ice rapidly on the smaller western side and the vulnerable peninsula.
@@ Line 23: / Line 57: @@
 =====Warming Greenland ice sheet passes point of no return=====
 AUGUST 13, 2020 by Laura Arenschield, The Ohio State University
-[https://phys.org/news/2020-08-greenland-ice-sheet.html?fbclid=IwAR1y-PfgqdoOjD9gpuxCK31pjWhZKCL__o9UkZEOMerEICiT5NkcOOF_Nik ]
+[https://phys.org/news/2020-08-greenland-ice-sheet.html?fbclid=IwAR1y-PfgqdoOjD9gpuxCK31pjWhZKCL__o9UkZEOMerEICiT5NkcOOF_Nik]
   Nearly 40 years of satellite data from Greenland shows that glaciers on the island have shrunk so much that even if global warming were to stop today, the ice sheet would continue shrinking.
@@ Line 32: / Line 66: @@
 =====A possible explanation for why West Antarctica is warming faster than East Antarctica=====
-[https://phys.org/news/2020-06-explanation-west-antarctica-faster-east.html?fbclid=IwAR1dELgDVsZf-eoYNuh3CUXKBMW2eF0lr2vvOBcq_2V5vNiFR3HGwcxy_Vg ]
+[https://phys.org/news/2020-06-explanation-west-antarctica-faster-east.html?fbclid=IwAR1dELgDVsZf-eoYNuh3CUXKBMW2eF0lr2vvOBcq_2V5vNiFR3HGwcxy_Vg]
 =====A massive waterfall formed on Greenland's ice sheet. Here's why it matters=====