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Climate change: instability spreads in the ice sheet of the West Antarctic



It turns out that the ice sheet has become 122 meters thinner in some places and the glaciers have become unstable according to scientists from the University of Leeds in England.

Affected glaciers are unstable because they melt and calve (breaking up chunks of ice), reducing their mass faster than they can replenish by snowfall, and the thinning has spread to 24% of the western Antarctic since 1992.

The largest ice flows in the region – the Pine Island and Thwaites glaciers lose five times faster ice than at the start of the measurements.

A team of scientists from the British Center for Polar Observation and Modeling (CPOM), which is based at the University, used satellite observations and climate models for 25 years to track the development of snow and ice cover in the region.

  The study examines changes in ice thickness from 1[ads1]992 to 2017.

"In parts of the Antarctic, the ice sheet has thinned extremely, and so we set out to show how much is due to climate and climate changes. How much was weather-related?" Said Andy Shepherd, senior study author and CPOM director ,

And ice losses lead to sea-level rise worldwide, Shepherd added.

"Total ice losses from the East and West Antarctic have contributed 4.6 mm to the rise in global sea level since 1992," he said.

  The world's largest ice shelf is melting ten times faster than the average.

Marcus Engdahl of the European Space Agency, co-author of the study, underlined the importance of satellite missions for exploring our planet's soil, "he said in a statement. [19659002] "For this reason, the view from space is an essential instrument for tracking the effects of climate change." Sun-warmed ocean water melting the Antarctic ice shelf.

The northwest sector of the Ross Ice Shelf in the Antarctic, which is approximately the total The size of France has melted ten times faster than the global average due to ocean water, according to experts from the University of Cambridge.

"The stability of ice shelves is generally related to being exposed to warm, deep ocean waters, however we have found that the surface water too Being heated by solar radiation plays a crucial role in melting ice shelves, "said Craig Stewart, senior author of the study of the New Zealand National Institute of Water and Atmospheric Research.


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