Arctic & Antarctic - page 9

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Radar reveals fjords hidden beneath Antarctic ice

Employing new ice-penetrating radar over a key area of Earth's largest body of ice, scientists are able to see a vast expanse of mountainous terrain and fjords that were carved by flowing glaciers when sea levels were some 200 feet higher than today.The shape of

June 07, 2011

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New Greenland ice loss study emerges

 In the last decade, two of the three largest glaciers in Greenland have lost enough ice that, if melted, could have filled Lake Erie.This startling picture of Greenland's ice loss comes from a new study that refines measurements of such ice loss and is

May 28, 2011

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Antarctic marine ecosystem threaten by Human Activity

A team of scientists in the United Kingdom and the United States has warned that the native fauna and unique ecology of the Southern Ocean, the vast body of water that surrounds the Antarctic continent, is under threat from human activity. Their study is published

May 16, 2011

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Effects of climate change in the Arctic more extensive than expected

The effects of climate change in the Arctic are already here. A much reduced covering of snow, shorter winter season and thawing tundra. And the changes are taking place significantly faster than previously thought. This is what emerges from a new research report on

May 09, 2011

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Thicker arctic ice had increased over last year

Layers of frozen sea water, known as sea ice, cap the Arctic Ocean. The ice grows dramatically each winter, and melts just as dramatically each summer. In the past decade, the melting has grown more dramatic, while growth has become less so.The pair of images

May 05, 2011

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Asteroid impacts in Antarctica

In a controversial study, gravity maps of the Antarctic continent have revealed what could be multiple asteroid impact sites. Gravity anomalies in Antarctica might mark spots where hundreds of thousands of years ago the frozen continent was struck by giant...

May 02, 2011

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Record-breaking crowd of humpback whales spotted near Antarctica

A record-breaking crowd of humpback whales has been seen in chilly waters near Antarctica, giving researchers a unique opportunity to study the colossal creatures. However, scientists warn the unprecedented whale numbers, drawn to the region for all-night feasting

April 30, 2011

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Study links ozone hole to climate change all the way to the equator

In a study to be published in the April 21st issue of Science magazine, researchers at Columbia University's School of Engineering and Applied Science report their findings that the ozone hole, which is located over the South Pole, has affected the entire circulation

April 27, 2011

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Impact of polar ozone depletion on subtropical precipitation

The ozone hole over Antarctica has been rearranging rainfall patterns throughout the Southern Hemisphere for decades, a new modeling analysis shows. The idea that losing ozone in the cold stratosphere over the South Pole could affect weather in the lower atmosphere...

April 22, 2011

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Arctic Ocean freshwater will cause 'unpredictable changes on climate'

A vast expanse of freshwater in the midst of the Arctic Ocean is set to wreak unpredictable changes on the climate in Europe and North America, new scientific analysis has shown.The water – comprising meltwater from the ice cap and run off from rivers – is at

April 06, 2011

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Russian boreal forests undergoing vegetation change

Russia's boreal forest - the largest continuous expanse of forest in the world, found in the country's cold northern regions - is undergoing an accelerating large-scale shift in vegetation types as a result of globally and regionally warming climate.That in turn is

March 30, 2011

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Arctic ocean show significant increase in freshwater content

Since the 1900, the freshwater content of the upper Arctic Ocean has increased by about 20 %. This corresponds to a rise of approx. 8,400 cubic kilometres and has the same magnitude as the volume of freshwater annually exported on average from this marine region in

March 30, 2011

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2011 arctic ice extent is down

The 2011 maximum extent of Arctic sea ice appears to be tied for the lowest amount in area since satellite measurements began 32 year ago.Researchers at the University of Colorado Boulder said the maximum ice extent was 463,000 square miles below the 1979-2000

March 28, 2011

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New deep-sea volcanic vents found in Antarctic’s Southern Ocean

British researchers say the discovery of deep-sea volcanic vents in the Antarctic’s Southern Ocean suggests they’re more common than previously thought. Deep-sea vents are hot springs on the seafloor, where mineral-rich water nourishes colonies of

February 15, 2011