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1977. This polygon shapefile contains ice observations in the Arctic region for December 12, 1977. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1982. This polygon shapefile contains ice observations in the Arctic region for December 12, 1982. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1988. This polygon shapefile contains ice observations in the Arctic region for December 12, 1988. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1994. This polygon shapefile contains ice observations in the Arctic region for December 12, 1994. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for December 12, 1997. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
2000. This polygon shapefile contains ice observations in the Arctic region for December 12, 2000. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
2001. This polygon shapefile contains ice observations in the Arctic region for December 12, 2001. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
2002. This polygon shapefile contains ice observations in the Arctic region for December 12, 2002. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1971. This polygon shapefile contains ice observations in the Arctic region for December 13, 1971. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1973. This polygon shapefile contains ice observations in the Arctic region for December 13, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).