Arctic & Antarctic - page 5

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2012 Arctic Report Card - Dramatic changes in the Arctic

The Arctic Report Card is tracking recent environmental changes, with 20 essays on different aspects of the environment. The Arctic Report Cards produced by the National Oceanic and Atmospheric Administration (NOAA) are a source of reliable and brief information on the

December 07, 2012

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Major study finds ice sheet loss at both poles increasing

In a landmark study published on Thursday, November 29, 2012 in the journal Science, 47 researchers from 26 laboratories report the combined rate of melting for the ice sheets covering Greenland and Antarctica has increased during the last 20 years. Together, these ice

November 30, 2012

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Pine Island Glacier's calving front free of sea ice

Flying over the Antarctica's Pine Island Glacier last year in October, NASA’s Operation IceBridge  scientists discovered a massive rift 29 kilometers (18 miles) long, 80 meters (260 feet) wide on average, and 50 to 60 meters (170 to 200 feet) deep. When that

November 24, 2012

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Antarctic sea ice cover is increasing under the effects of climate change

Antarctic sea ice drift caused by changing winds are responsible for observed increases in Antarctic sea ice cover in the past two decades according to new study by British Antarctic Survey and NASA. While Arctic experienced dramatic record ice loss due the climate

November 18, 2012

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Retreat of Crane Glacier on Antarctic's Larsen-B ice shelf

Hektoria and Crane glaciers on the Antarctic Peninsula have continued thinning since the Larsen-B ice shelf’s collapse in 2002.  They are considered to be among some of the fastest changing in recent years. Almost the entire Larsen B Ice Shelf splintered and

November 04, 2012

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NOAA, National Archives team up with citizen-scientists to reconstruct historical climate of the Arctic

Before there were satellites or weather data transmitters or computer databases, there were Arctic sea voyages and sailors dutifully recording weather observations in ship logs. Now a new crowdsourcing effort could soon make a wealth of weather data from these ship

October 26, 2012

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Wind shift could affect sea ice loss and bring more extreme weather to North America and Europe

Arctic has been experiencing a shift in the general patterns of high and low pressures recently, as well as the direction and speed of the winds. These changes may explain some of the dramatic sea ice loss experienced in the Arctic regions. Wind speed and direction

October 24, 2012

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ESA satellites observing sea ice

As reported earlier this year, Arctic sea ice is thawing at an unprecedented rate. News is perturbing, provided that heat exchange between sea and atmosphere is largely influenced by sea ice. Thermal flux, the rate at which heat energy transfers, can change

October 15, 2012

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Even major oil company warns of a potential disaster of Arctic oil drilling

Arctic region is the world’s last untapped oil and gas reserves.With rapid ice melt the region becomes more accessible to oil and gas companies. Oil has been produced continuously onshore in the Arctic for several decades. Offshore drilling first took place in

October 01, 2012

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Arctic sea ice shrinks to smallest extent ever recorded

Rate of summer ice melt smashes two previous record lows and prompts warnings of accelerated climate change. Arctic sea ice cover likely melted to its minimum extent for the year on September 16, according to scientists at the National Snow and Ice Data Center

September 20, 2012

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State of ozone hole

An international  treaty to protect the ozone layer, agreement to phase out chemicals which attack the Earth’s vital ozone shield, signed nearly 25 years ago prevented an environmental disaster according to latest press release by World Meteorological

September 17, 2012

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Million years old Antarctic Lake Ellsworth to be drilled soon

In October, after 16 years of planning a 12-man team of British scientists, engineers and support staff will  go deep into the heart of the frozen continent to collect samples of water and sediments from an ancient lake buried beneath ice to reveal vital secrets

September 10, 2012

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Antarctic ice sheet earthquakes shed light on ice movement and earthquakes

Penn State geoscientists made analysis of small, repeating earthquakes in an Antarctic ice sheet. They point that it may  lead to an understanding of glacial movement and also shed light on stick slip earthquakes like those on the San Andreas fault or in

August 31, 2012

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Arctic sea ice at lowest level on record

The amount of sea ice in the Arctic has fallen to the lowest level on record. On August 27, Arctic sea ice was at 4.10 million square kilometers (1.58 million square miles), or about 30 % of the Arctic Ocean’s surface according to the National Snow and Ice Data

August 28, 2012

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Arctic sea ice set to reach its lowest extent ever recorded

Ice volume in the Arctic has declined dramatically over the past decade.  Unprecedented rate of Arctic sea ice melt is set to reach its lowest extent ever recorded by the end of this week.Current melt rate of more than 100,000 square kilometers per day is expected

August 25, 2012

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Rapid ice melt opens Arctic's Northwest Passage

Ice retreated rapidly in the Parry Channel between mid-July and early August 2012. Parry Channel is a part of elusive Northwest Passage. The loss of Arctic sea ice is predicted to open up the Northwest Passage, shortening shipping routes and facilitating the exchange

August 11, 2012

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Great Arctic Cyclone of 2012 - Rare and unusually strong storm formed over Arctic

An unusually strong storm formed off the coast of Alaska on Aug. 5, then moved over the central Arctic. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite took the images that make up the mosaic during various passes over the North Pole

August 10, 2012