WASHINGTON (AP) - in a key index of climate warming in the world, the arctic sea ice to decrease when low, this year, wipe exchange the old for the record.
Last Sunday, in the arctic ice cap of 132 square miles. This is a small 18%, than the previous record in 2007 of 161 square miles, according to the us national snow and ice data center in boulder, Colorado Colorado records back in 1979 on the basis of the satellite tracking.
"The most important thing is, we have to break records, incompletely break a record," data center scientists walter meier said. Sea ice in 2007 fell 22%, lower than the previous record is the level of 2005.
The arctic ice melts in the summer, in the winter growth, Monday resumed growth. Meier said, in the 1980 s, summer sea ice cover area is slightly less than the United States 48 states. Now, it's about half.
Man-made global warming is melting of sea ice and its more in the past decades, it become more extreme thin this year, surprisingly, snow and ice data center director mark Serreze said.
"The recent XiaZhiBing acceleration and loss, all in the past six years the lowest six September ice degree,." Serreze said. "I think it is quite amazing."
Serreze said, in addition to a strong storm caused by the loss of ice, the summer melt from day to day the stability of global warming effect. But he and others said, the polar region is the global first saw the signs of climate change.
"Arctic sea ice is one of nature's most sensitive thermometer," said Jason box, Ohio state university polar research.
In the arctic climate change in all over the world what happens, scientists in the study.
Meier said, "in the arctic ice" basically maintain cooler role just like air conditioning. When sea ice melting, like air conditioning efficient operation, he said.
Sea ice reflect the sun's heat from the earth's more than 90%, but when it is replace dark open ocean, more than half of the quantity of heat is absorbed into the water, MEL said.
In the snow and ice data center scientists say they computer model shows that, the arctic will be in the summer of 2050 ice is basically free, but they added that the current trend showed that the melting of sea ice faster than computer prediction.




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