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Home | School Today | Fast Melting Glacier Raise Sea Levels

Fast-melting glacier raise sea levels

Pine Island Glacier is losing more ice than any other glacier in Antarctica and has been a cause of concern.

By Telangana Today
Published Date - 09:04 PM, Sun - 11 April 21
Fast-melting glacier raise sea levels
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Pine Island Glacier — a region of fast-flowing ice draining in West Antarctica — may cross tipping points, which can lead to future global sea-level rise, researchers have found.

Pine Island Glacier is losing more ice than any other glacier in Antarctica and has been a cause of concern. Along with neighboring Thwaites glaciers, the region is responsible for about 10 percent of the ongoing increase in global sea level.

The study showed that an increase of 1.2 Celsius in ocean temperatures can lead to an irreversible retreat causing a total collapse of the West Antarctic Ice Sheet. Further, it can also raise the global sea level by over three meters, said, researchers.

The long-term warming and shoaling trends in Circumpolar Deep Water, in combination with changing wind patterns in the Amundsen Sea, can expose Pine Island Glacier’s ice shelf to warmer waters for longer periods of time, making temperature changes of this magnitude increasingly likely, the researchers noted.

They found that the critical glacier has at least three distinct tipping points. The first and second tipping events are relatively small but require a large reversal in ocean conditions for recovery. But, the third and final tipping point is crossed with an increase in sub-shelf melt rates equivalent to a 1.2 degree Celsius increase in ocean temperatures, leading to a complete collapse.


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