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The ice thickness depends on season. In the antarctic sea, practically all sea-ice melts in the antarctic summer (keep in mind that antarctic land is covered by deep glaciers all year).

In the arctic, in summer the ice thins. It used to retain an average thickness of a few meters, but in the past few years it thinned. On Aug 16 2010 PIOMAS published an ice volume of about 5 million cubic meters (they actually published an anomaly of about -9.7 from the 1979-2009 average of 14.7). For that date, the

Arctic Climate Research at the University of Illinois published an area of about 4 million square meters (a few thousand more) so it gives about 1.25 meter average depth. Note that PIOMAS is only using a validated model plus some measurements, as there are no global direct measurements (seems there will be next year). Expect to see more numbers at end of September, as the minimum of arctic sea-ice is around mid-Septrmber.

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Q: What is the average thickness of pack ice?
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