North Bay warm melting polar ice near the Arctic ice disappearing by 2040 12 13
2006 07:55
Above: September 20 published photos show a separation from the glacier iceberg floating in the Greenland Southwest sea.
scientists in the latest issue of top of the vast expanse of the Arctic, will become a blue-green ocean, polar bear hunting by large ice floes in the home will face extinction.
the experts, the Arctic will be ice-free in Russia and Canada The study of the U.S. National Center for Atmospheric Research (NCAR) scientists Holland said: more severe. the former will remain stable, but then will rapidly increase. supercomputer simulations based on the situation in 2040 will be completely ice-free Arctic.
Ocean area has been substantially the rapid melting of Arctic ice disappeared
There are two reasons First, the warm ocean currents that flock to global warming the Arctic. In addition, as sea water absorbs more sunlight than ice, the ice melted, while Yang will make the Arctic warming and melting ice to further increase the speed.
one of the computer simulation are shown, with an area of 230 square miles (596 square kilometers) of the Arctic ice sheet, will fade in 10 years to 77 million square miles (199 square kilometers), to 2040, only a very small amount of ice always keep the ocean will occur along the northern coast of Greenland and Canada, and most of the Gulf in September when the North Pole will be completely ice-free. As the thickness of winter ice, from the current 12 feet (3.7 meters), reduced to only 3 feet (about 0.9 meters ).
the past 25 years, Arctic ice has decreased by 25%. Over the past 2 years, Ocean area of 6% annual rate of reduction than the 10 years since 1979 were higher than the 1.5% recorded very much. If Greenland warming of the ice cover ultimately melt, sea levels will rise 23 feet (about 7 meters).
potential changes in the global ecosystem
melting Arctic ice will change the Earth's ecosystems, including marine and surface organisms, weather, shipping patterns, and even national defense policy. Scientists at the University of Colorado Selei Ze said the new channel will bring economic benefits for Russia, while Canada, this is more of an opportunity to bring economic take-off.
U.S. Treadwell said the Arctic Research Commission, countries will be under the new geographical boundaries to develop new strategies, such as the United States may need to send troops patrolling the border in northern Alaska, and in response to the new path to develop prevention measures for oil leaks.
Source: China News
Arctic ice significantly reduced over the past two years, may soon disappear. (NASA map)
2040, the Arctic ice melting
all the Yangcheng Evening News (2006-12-1314 : 28)
United States, Arctic ice melting faster.
Task Force Report predicted member of the National Center for Atmospheric Research Fellow, Marica? Holland expected, due to the growing global climate warming, 70% of the area covered by Arctic ice is gradually melting, in the next 30 to 50 years, almost all the Arctic ice will disappear from the earth.
study also noted that today, the Arctic ice melting faster annual rate, is expected after 20 years, sea ice will be 4 times faster than ever, the rapid rate of melting.
University and McGill University researchers are also involved in research projects on the Arctic ice. They use supercomputers in the Arctic ice for historical analysis and future projections.
In general, the Arctic ice area changes with the seasons . Usually, the Arctic ice cap from late spring to September each year continue to shrink, and by autumn and winter has returned to the maximum.
researchers carried out a simulation study results show that glaciers in the Arctic summer, from about 600 in 10 years million square kilometers down to 2 million square kilometers. in accordance with the prediction that by 2040, glaciers in the Arctic basin will not be re-built in, only a small amount of perennial sea ice would remain in northern Greenland and Canada.
influence surface Although widely
Arctic far away from most human habitation, but the ice to melt but it will cause global ecosystem change, marine biology, weather conditions, shipping patterns, and even affect national defense policy.
Arctic cold weather is less and less to other areas will directly affect the climate model. the Colorado area as an example, the local ski area will be smaller areas, plants will follow changes in planting season.
In addition, the last a study on the United States, due to melting of glaciers, with 20 years ago, the Alaska Beaufort Sea polar bear precarious living conditions. robbed the summer ice melt polar bear territory, and by polar bears hunt seals for a living have to move land, by the consumption of stored fat to sustain life.
more harm than good
However, Se Leizi that, from a positive point of view, Russia has frozen a number of areas of possible future through the ship, and the new flight paths opening will bring economic benefits, promote economic development.
lost a lot of Arctic ice will bring a series of problems, such as wildlife, fish, how to adapt to ecosystem changes, and the Arctic have close geographical boundaries of countries how to deal with new and other issues.
scientists agree that human activities led directly to global climate change. Therefore, the only limit human emissions of greenhouse gases to slow down the rate of melting of Arctic ice.
Wang (Xinhua News Agency feature articles)
(Ziqi / preparation)
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