Polar Melting: Difference between revisions
From WikiDemocracy
Jump to navigationJump to search
mNo edit summary |
|||
| Line 8: | Line 8: | ||
}} | }} | ||
=====Ice shelf collapses in previously stable East Antarctica===== | ===== 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] | [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. | 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 27: | ||
=====Warming Greenland ice sheet passes point of no return===== | =====Warming Greenland ice sheet passes point of no return===== | ||
AUGUST 13, 2020 by Laura Arenschield, The Ohio State University | 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. | 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 36: | ||
=====A possible explanation for why West Antarctica is warming faster than East Antarctica===== | =====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===== | =====A massive waterfall formed on Greenland's ice sheet. Here's why it matters===== | ||
