1974. This polygon shapefile contains ice observations in the Arctic region for December 28, 1974. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
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1976. This polygon shapefile contains ice observations in the Arctic region for December 28, 1976. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1977. This polygon shapefile contains ice observations in the Arctic region for December 28, 1977. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1968. This polygon shapefile contains ice observations in the Arctic region for December 29, 1968. 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 3, 1979. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1984. This polygon shapefile contains ice observations in the Arctic region for December 3, 1984. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1967. This polygon shapefile contains ice observations in the Arctic region for December 30, 1967. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1970. This polygon shapefile contains ice observations in the Arctic region for December 30, 1970. 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 30, 1971. 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 30, 1975. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).