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1971. This polygon shapefile contains ice observations in the Arctic region for December 2, 1971. 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 3, 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 6, 1971. 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 9, 1967. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1976. This polygon shapefile contains ice observations in the Arctic region for July 1, 1976. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for July 1, 1978. This polygon shapefile contains ice observations in the Arc... Arctic Climate System (ACSYS).
1980. This polygon shapefile contains ice observations in the Arctic region for July 1, 1980. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
1975. This polygon shapefile contains ice observations in the Arctic region for July 10, 1975. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1974. This polygon shapefile contains ice observations in the Arctic region for July 11, 1974. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for July 11, 1978. This polygon shapefile contains ice observations in the Ar... Arctic Climate System (ACSYS).