1977. This polygon shapefile contains ice observations in the Arctic region for December 15, 1977. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
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1980. This polygon shapefile contains ice observations in the Arctic region for December 15, 1980. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1986. This polygon shapefile contains ice observations in the Arctic region for December 15, 1986. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for December 16, 1978. This polygon shapefile contains ice observations in th... Arctic Climate System (ACSYS).
1973. This polygon shapefile contains ice observations in the Arctic region for December 17, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1979. This polygon shapefile contains ice observations in the Arctic region for December 17, 1979. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1972. This polygon shapefile contains ice observations in the Arctic region for December 18, 1972. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1975. This polygon shapefile contains ice observations in the Arctic region for December 18, 1975. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1980. This polygon shapefile contains ice observations in the Arctic region for December 18, 1980. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1989. This polygon shapefile contains ice observations in the Arctic region for December 18, 1989. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).