Antarctica’s ‘Doomsday Glacier’ is in serious danger, new research confirms

Antarctica's 'Doomsday Glacier' is in serious danger, new research confirms

Scientists call it the Doomsday Glacier.

Part of this is the alarming melting of the British-sized glacier Twaits in western Antarctica: it recedes half a mile (2,625 feet) per year. Scientists estimate that all glaciers will be gone in about 200 to 600 years. When it does, it will Raise the sea level to 1.6-2 feet (0.5 m).

But sea level rise does not end there. Twitz’s nickname is mostly from what happens after the meltdown.

Currently, glaciers act as a buffer between warmer seas and other glaciers. Its collapse could lead to snowfall in neighboring western Antarctica. The process will raise sea levels to about 10 feet and permanently submerge many coastal areas, including New York City, Miami and the Netherlands.

“It’s a big change, changing the coastline,” said David Holland, a professor of meteorology at New York University, who contributes research to the International Twitz Glacier collaboration. Told PBS Newshor in February.

This worm, two new studies added details to the frightening picture. The research was published in the journal Last Week Cryosphere It was found Warm ocean currents in the lower reaches of the Twaits Glacier may be destroyed.

Meanwhile, a study published on Monday Satellite imagery used To show that parts of the Tweets and its neighboring Pine Island Glacier are decomposing faster than previously thought. Published by Procedures of the National Academy of Sciences.

The images below reveal what will happen to the Tweets and nearby glaciers in the future as well.

The melting of the Twaits and Pine Island glaciers is already about 5 percent of sea level rise.

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(Lhermitte et al., PNAS, 2020)

the above: Satellite imagery between October 2014 and May 2019 shows extensive damage to Tweets and Pine Island glaciers.

It’s not just the Tweets: the Antarctic ice sheet Melts six times faster Than in the 1980s. It sheds 252 billion tons per year, up from 40 billion tons per year 40 years ago.

Scientists estimate sea level to rise as the entire Antarctic ice sheet melts 200 feet high (60 m).

Pictures taken before and after the spacecraft show the Whites merge into the sea.

“Satellites show a glacier coming ashore,” said Ted Scambose, a senior scientist at the University of Colorado. Told NASA in February.

According to new research, this rapid melting occurs due to the decomposition of natural buffers held by whites and pine glaciers.

Twitz2(Ian Joffin / University of Washington)

the above: Cravas near the grounding line of the Pine Island Glacier in Antarctica.

Glaciers similar to those in the image of the Pine Island Glacier above form near the scissor edges of glaciers: areas where fast-moving glacier ice meets ice or rock, and what it contains.

New PNAS Research Scissor margins on Pine Island and the Twaits Glacier are weakening and disintegrating, which has been found to cause ice to flow into the ocean.

The loss of the Twitz Glacier is highly worrying, and the US and UK have created an international agency to study it.

That organization, the International Twitz Glacier Cooperation, Studying the glacier through icebreaker ships that can break up thick ice sheets.

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In February, researchers discovered a chamber about the size of Manhattan at the bottom of the Tweets.

3(NASA / OIB / Jeremy Harbeck)

the above: A 1,000-foot-high chamber grows beneath the Twitz Glacier in western Antarctica.

Chamber, which NASA scientists found In 2019, 14 billion tons of ice could be captured using ice penetrating radar.

The diagram below shows how the glacier moves under the warm warm water, which slowly melts from the bottom.

(International Twitz Glacier Collaboration)(International Twitz Glacier Collaboration)

the above: The 3D diagram of the Twitz Glacier depicts sea-floor channels that can cause hot water to carry and melt to the bottom of the glacier.

As the ice sheets melt from below, They will lose their structure, They melt faster and disintegrate in the ocean, as the Twaits do.

Researchers estimate that the Pine Island Glacier has lost the size of Los Angeles over the past six years.

“These are the first signs that the Pine Island ice shelf is disappearing,” said Steff Lermit, a satellite expert and lead author. PNAS Research, Said Washington Post.

“This damage is hard to heal.”

Sea level rise is expected to affect 800 million people by 2050, according to a 2018 report.

Tweets5(Climate Central)

the above: A forecast of what New York City will look like when it rises 10 feet above sea level.

Report, Climate network of C40 cities, Rising above sea level would endanger the power supply to 470 million people and lead to 1.6 billion people being regularly exposed to high temperatures.

This article was originally published Business Insider.

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