After Cool Summer, Arctic Ice Extent 12th Lowest In Record, But Most Of Thickest Multiyear Ice Gone
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The probable minimum extent of 4.72 million square kilometers (1.82 million square miles) was reached on Sept. 16, the center said. It was the highest since 2014 and ranks as the 12th lowest in the 43-year satellite record, the center said. Though significantly higher than the record-low extent of 2012 and the near-record-low extent last year, this years minimum is low compared to earlier years and part of a declining trend.
All 15 of the lowest-extent minimums have been in the last 15 years, the NSIDC said. This years minimum extent was 1.5 million square kilometers (579,000 square miles) below the 1981-2010 average. Sea ice extent minimums have fallen by 13 percent per decade, relative to the 1981-2010 average, since satellite records began in 1979, the center said.
This years minimum, the product of melt that was moderated by the cool and cloudy weather, was part of the natural variation in the system, said NSIDC Director Mark Serreze.Its better than it was. Its still not good, Serreze said. Theres no reason to think that theres any rebound.
And this year the minimum extent figure, which tends to get the most news media attention, masks other troubling signs, such as near-record thinness and the lost of multiyear ice. The total amount of that ice, which has survived one or more summer melts, was among the lowest since ice-age records started in 1984, the NSIDC said. Multiyear ice, which tends to be thicker and more resistant to melting than new ice, is pretty much as low as its ever been, Serreze said. Most of the old ice is now gone,
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https://www.arctictoday.com/a-cool-summer-sees-arctic-sea-ice-reach-its-12th-lowest-minimum-extent-on-record/