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The Antarctic is likely to cause rapid sea-level rise under the influence of climate change



  Antarctica
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Australian National University (ANU) scientists have shown that Antarctic ice melt causes rapid and high sea-level rise and is a warning of the impact of man-made climate change.

The researchers looked at historical and new data from the & # 39; last interglacial, which took place between 1

25,000 and 118,000 years ago, and where sea levels rose 10 meters above current levels over the last millennia.

The study, published in Nature Communications shows that sea levels rose up to three meters per century, mainly due to ice loss in the Antarctic ice sheet.

Lead author Professor Eelco Rohling said the last interglacial increase was due to natural climate instabilities.

"These were smaller and slower than the man-made climate disorders of today," he said.

"Our study shows It is clear that the Antarctic, which for a long time was considered a sleeping giant for sea-level rise, is the main actor."

"And it seems that they turn into periods of time for society and in some ways of great relevance, can greatly change that would affect human infrastructure. "

The study shows for the first time how much ice was lost in the last interglacial phase first in the Antarctic and subsequently in Greenland, the beginning of the interglacial Antarctic meltwater caused global ocean circulation changes leading to warming of the ocean [Co-chiefauthorDrAtmosphericandoceanicwarmingoccursimultaneouslyinbothpolarregions

"This leads to simultaneous ice loss in Antarctica and Greenland," said Dr Hibbert is larger and developing faster than the last interglacial.

"As a result, sea level rise rates may evolve over the next few centuries, even higher than those found for the interglacial we studied." [19659005] The study was shared by Professor Rohling and Dr. Hibbert von der ANU Sam with colleagues from Australia, Norway, Spain, the USA and Germany.


W. The crumbling ice sheet of the Antarctic is supposed to redraw the global coastline


Further information:
Eelco J. Rohling u. A. Asynchronous ice volume contributions of the Antarctic and Greenland to the last interglacial sea-level rise, Nature Communications (2019). DOI: 10.1038 / s41467-019-12874-3

Provided by
Australian National University




Quote :
The Antarctic is expected to lead to rapid sea level rise under the impact of climate change (2019, 6 November)
retrieved on 6 November 2019
from https://phys.org/news/2019-11-antarctica-rapid-sea-level-climate.html

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