A recent analysis produced by NIC using SIPAS.
Revised
May 22, 2007
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National Oceanic and Atmospheric Administration | U.S. Department of Commerce
http://celebrating200years.noaa.gov/transformations/ice_ctr/sipas_chuk06.html
National Oceanic and Atmospheric Administration | U.S. Department of Commerce
http://celebrating200years.noaa.gov/transformations/ice_ctr/sipas_chuk06.html