{"id":51163,"date":"2020-08-21T13:46:00","date_gmt":"2020-08-21T10:46:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/sea-level-rise-quickens-as-greenland-ice-sheet-sheds-record-amount\/"},"modified":"2020-08-21T13:46:00","modified_gmt":"2020-08-21T10:46:00","slug":"sea-level-rise-quickens-as-greenland-ice-sheet-sheds-record-amount","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/sea-level-rise-quickens-as-greenland-ice-sheet-sheds-record-amount\/","title":{"rendered":"#Sea level rise quickens as Greenland ice sheet sheds record amount"},"content":{"rendered":"

“#Sea level rise quickens as Greenland ice sheet sheds record amount<\/strong>”<\/p>\n

\n
\n
\n
\"Until<\/img>
\n Until 2000, Greenland’s ice sheet accumulated as much mass as it shed
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

Greenland’s massive ice sheet saw a record net loss of 532 billion tonnes last year, raising red flags about accelerating sea level rise, according to new findings.<\/p>\n

\n <\/section>\n

That is equivalent to an additional three million tonnes of water streaming into global oceans every day, or six Olympic pools every second.<\/p>\n

Crumbling glaciers and torrents of melt-water slicing through Greenland’s ice block\u2014as thick as ten Eiffel Towers end-to-end\u2014were the single biggest source of global sea level rise in 2019 and accounted for 40 percent of the total, researchers reported in the journal Communications Earth & Environment.
\nLast year’s loss of mass was at least 15 percent above the previous record in 2012, but even more alarming are the long-term trends, they said.
\n“2019 and the four other record-loss years have all occurred in the last decade,” lead author Ingo Sasgen, a glaciologist at the Helmholtze Centre for Polar and Marine Research in Germany, told AFP.
\nThe ice sheet is now tracking the worst-case global warming scenario of the UN’s climate science<\/a> advisory panel, the IPCC, noted Andrew Shepherd, director of the Centre for Polar Observation and Modelling at the University of Leeds.
\n“This means we need to prepare for an extra ten centimetres or so of global sea level rise by 2100 from Greenland alone,” said Shepherd, who was not involved in the study.
\nRedraw world’s coastlines<\/b>
\nIf all of Greenland’s ice sheet were to melt, it would lift global oceans by seven metres (23 feet).
\nEven a more modest rise of a couple of metres would redraw the world’s coastlines and render land occupied today by hundreds of millions of people uninhabitable. <\/p>\n

\n
\n
\"If<\/img>
\n If all of Greenland’s ice sheet were to melt, it would lift global oceans by seven metres
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

Until 2000, Greenland’s ice sheet\u2014covering an area three times the size of France\u2014general<\/a>ly accumulated as much mass as it shed.
\nRunoff, in other words, was compensated by fresh snowfall.
\nBut over the last two decades ago, the gathering pace of global warming has upended this balance.<\/p>\n

The gap is widening at both ends, according to the study, which draws from nearly 20 years of satellite data.
\nChanging weather patterns\u2014also a consequence of climate change\u2014has resulted in less cloud cover, and thus less snow. These high pressure systems have also resulted in more, and warmer, sunny days, accelerating the loss of mass.
\nIn 2019, the ice sheet lost a total of 1.13 trillion tonnes, about 45 percent from glaciers sliding into the sea, and 55 percent from melted ice, said Sasgen. It gained about 600 billion tonnes through precipitation.
\nA study in the same journal last week concluded that the Greenland’s ice sheet has passed a “tipping point”, and is now doomed to disintegrate, though on what time scale is unknown.
\n‘Alarm bells ringing’<\/b>
\nSasgen says it is too soon to know if we have reached a point of no return, but agrees that the ice sheet is likely to continue losing mass, even in colder years.
\n“But that doesn’t mean that trying to limit warming doesn’t matter,” he added. <\/p>\n

\n
\n
\"Forecast<\/img>
\n Forecast retreat of Greenland’s ice sheet
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

“Every decimal degree you save in terms of warming will save a certain amount of sea level rise, both in magnitude and speed.”
\nAt the other end of the world, the West Antarctic Ice Sheet\u2014which holds another six metres worth of sea level rise\u2014is similarly thought to be teetering on a tipping point, with many experts convinced it has already passed it.
\nScientists not involved in the research were not surprised by the findings, but expressed concern.
\n“The ice sheet has lost ice every year for the last 20 years,” said Twila Moon, a research scientists at the University of Colorado.
\n“If everyone’s alarm bells were not already ringing, they must be now.”
\nStuart Cunningham, an oceanographer from the Scottish Association for Marine Science, warned about the potential impact on the North Atlantic circulation, a current that keeps northwestern Europe five to ten degrees Celsius warmer that similar latitudes elsewhere on the globe.
\n“Climate models show this circulation can be switched off by adding fresh water to the North Atlantic,” he said, noting this happ<\/a>ened during the end of the last ice age.
\n“This tipping point in the climate system is one of the potential disasters facing us.”
\nFrom 1992 to 2018, Greenland lost about four trillion tonnes of mass, causing the mean sea level to rise by 11 millimetres, according to a December 2019 study in Nature<\/i>.<\/p>\n

\n<\/hr>\n
\n<\/hr>\n

\n \u00a9 2020 AFP<\/p>\n

\n Citation<\/strong>:
\n Sea level rise quickens as Greenland ice sheet sheds record amount (2020, August 21)
\n retrieved 21 August 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-08-sea-quickens-greenland-ice-sheet.html<\/p>\n

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“#Sea level rise quickens as Greenland ice sheet sheds record amount” Until 2000, Greenland’s ice sheet accumulated as much mass as it shed Greenland’s massive ice sheet saw a record net loss of 532 billion tonnes last year, raising red flags about accelerating sea level rise, according to new findings. That is equivalent to an…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[12464,56693],"class_list":["post-51163","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-earth-sciences","tag-sea-level-rise-quickens-as-greenland-ice-sheet-sheds-record-amount"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/51163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=51163"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/51163\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=51163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=51163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=51163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}