Study Claims Humans Responsible for Half of Arctic Ice Melt
Wednesday, August 17, 2011
(photo: Greenpeace)
Humans are responsible for about half of the recent melting of polar ice, according to scientists at the nation’s leading climate research center.
Using supercomputers and advanced climate models, scientists at the National Center for Atmospheric Research in Boulder, Colorado, determined for the first time that greenhouse gases and particulates from pollution had caused one half of the Arctic sea melt-off.
The other half was due to “natural variability,” or nonhuman forces impacting the polar climate.
According to the report, “Since accurate satellite measurements became available in 1979, the extent of summertime Arctic sea ice has shrunk by about one third. The ice returns each winter, but the extent shrank to a record low in September 2007 and is again extremely low this year, already setting a monthly record low for July.”
Environmentalists are expected to use the study to strengthen their fight for greater protection of the polar bear, whose habitat is directly affected by the loss of ice flows.
Scientists also noted in their paper that over the next several decades, the polar ice may stabilize or even expand somewhat at times, which could complicate governments’ and businesses’ plans to take advantage of new sea lanes opening up in the Arctic.
-Noel Brinkerhoff
New Study Blames Human Beings for Half of Arctic Ice Melt (by Richard Mauer, Anchorage Daily News)
Arctic Ice Melt Could Pause in Near Future, Then Resume Again (University Corporation for Atmospheric Research)
Inter-Annual to Multi-Decadal Arctic Sea Ice Extent Trends in a Warming World (Geophysical Research Letters)
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