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Posted Thu Feb 20 2014: from
NASA:
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NASA satellites see Arctic surface darkening faster http://apocadocs.com/s.pl?1392863868
The retreat of sea ice in the Arctic Ocean is diminishing Earth's albedo, or reflectivity, by an amount considerably larger than previously estimated, according to a new study that uses data from instruments that fly aboard several NASA satellites.... As the sea ice melts, its white reflective surface is replaced by a relatively dark ocean surface. This diminishes the amount of sunlight being reflected back to space, causing Earth to absorb an increasing amount of solar energy.
The Arctic has warmed by 3.6 F (2 C) since the 1970s. The summer minimum Arctic sea ice extent has decreased by 40 percent during the same time period. These factors have decreased the region's albedo, or the fraction of incoming light that Earth reflects back into space -- a change that the CERES instruments are able to measure.
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[Read more stories about:
albedo effect, anthropogenic change, arctic meltdown, climate impacts, global warming, holyshit, feedback loop, faster than expected]
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