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2/8/14, "Week in Review," Climate Etc., Judith Curry
"Sea ice update
Check out this latest article from NSIDC.
The summary: Arctic sea ice extent remained lower than average in
January, and just within two standard deviations of the long-term
average. Arctic temperatures remained above average, even as cold winter
air embraced North America. The retention of more sea ice in September
2013 has increased the overall thickness and volume of the ice pack
compared to recent years. Antarctic sea ice remains significantly more
extensive than average.
Regarding ice thickness:
Preliminary measurements from CryoSat show that the
volume of Arctic sea ice in autumn 2013 was about 50% higher than in the
autumn of 2012. In October 2013, CryoSat measured
approximately 9,000 cubic kilometers (approximately 2,200 cubic miles)
of sea ice compared to 6,000 cubic kilometers (approximately 1,400 cubic
miles) in October 2012. About 90% of the increase in volume between the
two years is due to the retention of thick, multiyear ice around
Northern Greenland and the Canadian Archipelago. However, this apparent
recovery in ice volume should be considered in a long-term context. It
is estimated that in the early 1980s, October ice volume was around
20,000 cubic kilometers (approximately 4,800 cubic miles), meaning that
ice volume in October 2013 still ranks among the lowest of the past 30
years. CryoSat will continue to monitor sea ice through the current
growth season, and the data will reveal the effect of this past autumn’s
increase on ice volume at the end of winter."
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2/5/14, "Thicker on top, more down under," nsidc.org. "Arctic Sea Ice news and analysis"
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