Clipping of news on Brazilian Culture, Law and Citizenship
24/08/2012
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Norwegian Institute states that record melt already happened, while other institutions want to wait until next week to confirm the indentation
The area of Arctic sea ice shrinkage showed a record, surpassing the previous minimum of 2007, in a sign of how climate change is transforming the region, according to some scientific estimates.
"We have reached the minimum ice area today (Thursday, 23). Never measured less than now," he told Reuters Ola Johannessen, founding director of the Nansen Environmental and Remote Sensing Center in Norway. "It is below the minimum of 2007."
However, the National Snow and Ice Data Center (NSIDC), the United States, considered by many the leading authority in relation to sea ice, projected that the record minimum extent for 2007 is expected to be broken next week. The decrease recorded in the summer in general continues in September.
Other scientists who monitor the ice interpret satellite data in slightly different ways.
A panel on the ice compiled by the Danish Meteorological Institute (DMI, its acronym in English) showed that ice extent has shrunk a little bit more than the minimum of 2007. The DMI said NSIDC disagree to judge when the record was broken.
The ice has been shrinking steadily in recent decades in the Arctic, threatening the livelihoods of indigenous people and wildlife. The change has also helped open an area rich in oil and gas and brings the promise of new shipping routes and shorter.
"This is due to climate change," said Nicolai Kliem, head of the ice DMI, about the decline of summer ice in the long run. Scientists estimate that the summer sea ice could disappear entirely in coming decades.
The retreat of the ice may be autoalimentando. The ice reflects sunlight back into space, and as it shrinks, exposes the dark water that absorbs more heat, accelerating the melt.
Source: Ig News
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This article was translated by an automatic translation system, and was therefore not reviewed by people.