NEWS: Climate Change March 25, 2013 – 4:05 pm
Arctic sea ice cover reached during a limit for 2013-13 on Mar 15
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Arctic sea ice border on Mar 15 was 15.13 million sq. km. The orange line shows a 1979 to 2000 median border for that day. The black cranky indicates a geographic North Pole. (PHOTO COURTESY OF THE NSIDC)
On Mar 15, Arctic sea ice border appears to have reached a annual limit extent, a National Snow and Ice Data Center conspicuous Mar 25.
That date noted a commencement of a yearly sea ice warp season, with a 2012-13 limit border of about 15 million block kilometres entrance in as a sixth lowest in a satellite record.
The limit border was 733,000 sq. km. next a 1979 to 2000 normal of 15.86 million sq. km.
And it occurred 5 days after than a 1979 to 2000 normal date of Mar 10.
The NSIDC conspicuous a date of a limit Arctic ice border has sundry extremely over a years.
The beginning limit in a satellite record occurred as early as Feb. 24 in 1996 and as late as Apr 2 in 2010. The lowest limit border occurred in 2011.
But a trend is streamer in a downward direction: a 10 lowest maximums in a satellite record of some-more than 30 years occurred from 2004 to 2013.
Over a 2012 to 2013 winter season, Arctic sea ice border did grow by a record 11.72 million sq. km.
The record expansion was a outcome of a record low smallest final September, that left a larger border of sea aspect unclosed by ice to re-freeze this winter, a NSIDC said.
Last autumn’s record low and this winter’s record ice expansion uncover there’s a “more conspicuous anniversary cycle in Arctic sea ice and a augmenting prevalence of first-year ice in a Arctic,” a Colorado-based centre said.
Article source: http://www.nunatsiaqonline.ca/stories/article/65674arctic_sea_ice_starts_its_big_melt_data_centre/
