Archive for East Antarctica

Mystery Antarctic ‘Crater’ Could Be House-Sized Meteor Blast

Posted in 2015, astronomy with tags , , on January 12, 2015 by MARIE EMMANUELLE QUILICHINI

 

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Scientists conducting a routine aerial research flight above East Antarctica noticed a strange ring-like structure in the normally flat and featureless ice.

It appeared to be a series of broken ‘icebergs’ surrounded by a 2km (1.24 miles) wide circular scar, surrounded by a few other smaller circular scars in the ice.

German scientists from the Alfred Wegener Institute on a routine survey flight spotted the 2km (1.24 mile) wide crater (main picture) in the ice shelf off the Princess Ragnhild Coast of East Antarctica, which can be seen in the north east corner of the continent in the inset map.

The location matched those of a meteorite spotted by Australian scientists at the Davis Research Station off the eastern coast of Antarctica in 2004. Low frequency sound detected in 2004 around the world also suggested a 7-10 metre wide meteorite exploded Antarctica and rained down debris onto the ice
Read more: http://www.dailymail.co.uk/sciencetech/article-2906488/Mystery-mile-wide-ring-Antarctica-Enormous-scar-crater-house-sized-meteorite-hit-Earth-2004.html#ixzz3OdwXeSMi

Antarctic Ice Shelf On Brink Of Unstoppable Melt That Could Raise Sea Levels For 10,000 Years

Posted in 2014 with tags , , , on May 5, 2014 by MARIE EMMANUELLE QUILICHINI

Ice calving from the Petzval Glacier in Paradise Bay in Antarcti

 

OSLO, May 4 (Reuters) – Part of East Antarctica is more vulnerable than expected to a thaw that could trigger an unstoppable slide of ice into the ocean and raise world sea levels for thousands of years, a study showed on Sunday.

The Wilkes Basin in East Antarctica, stretching more than 1,000 km (600 miles) inland, has enough ice to raise sea levels by 3 to 4 metres (10-13 feet) if it were to melt as an effect of global warming, the report said.

The Wilkes is vulnerable because it is held in place by a small rim of ice, resting on bedrock below sea level by the coast of the frozen continent. That “ice plug” might melt away in coming centuries if ocean waters warm up.

“East Antarctica’s Wilkes Basin is like a bottle on a slant. Once uncorked, it empties out,” Matthias Mengel of the Potsdam Institute for Climate Impact Research, lead author of the study in the journal Nature Climate Change, said in a statement.

Co-author Anders Levermann, also at Potsdam in Germany, told Reuters the main finding was that the ice flow would be irreversible, if set in motion. He said there was still time to limit warming to levels to keep the ice plug in place.

Almost 200 governments have promised to work out a U.N. deal by the end of 2015 to curb increasing emissions of man-made greenhouse gases that a U.N. panel says will cause more droughts, heatwaves, downpours and rising sea levels.

Worries about rising seas that could swamp low-lying areas from Shanghai to Florida focus most on ice in Greenland and West Antarctica, as well as far smaller amounts of ice in mountain ranges from the Himalayas to the Andes.

Sunday’s study is among the first to gauge risks in East Antarctica, the biggest wedge of the continent and usually considered stable. “I would not be surprised if this (basin) is more vulnerable than West Antarctica,” Levermann said.

TO BE CONTINUED ON THEIR WEBSITE

http://www.huffingtonpost.com/2014/05/05/antarctic-ice-melt_n_5263660.html?utm_hp_ref=climate-change

AN OVERVIEW OF THE DAMAGE CAUSED BY RISING WATER AROUND THE WORLD

Posted in 2013 with tags , , , , , , , , , , , on November 9, 2013 by MARIE EMMANUELLE QUILICHINI

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One house remains above water level

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An orange line painted on the condemned house – and Robb Braidwood, Office of Emergency Management Chesapeake, Virginia – shows the usual high water in the area.” A storm is not even necessary , says Braidwood. Heavy rains and winds in the wrong direction at a high enough tide. “

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As seawater warms, it expands. This thermal expansion accounts for about a third of the current rise in sea level. The melting of mountain glaciers account for another third.By 2100, it will no doubt raises several centimeters sea level, but no more. The volume of ice mountains remains small enough.

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Its contribution is small today but worrying sign, its surface began to melt in the summer. The ice sheet contains enough water to raise sea levels by almost 7.5 m.

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The East Antarctica seems fairly stable. However, the warming of the ocean mine parts of the ice sheet of West Antarctica. The future of the cap, such as Greenland, is very uncertain.

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A coastal defense work today protects Malé, the capital of Maldives. This archipelago in the Indian Ocean is the lowest country in the world and flat. Rising seas could force Maldivians to abandon their homeland before 2100. More than 100 000 people live on this island of 1.9 km2.

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Dangerously exposed to the next typhoon, these families homeless crowd into coastal slums in Manila, Philippines. Rapid land subsidence worse by the global sea level rise.

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