1973. This polygon shapefile contains ice observations in the Arctic region for September 10, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
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1968. This polygon shapefile contains ice observations in the Arctic region for July 29, 1968. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1972. This polygon shapefile contains ice observations in the Arctic region for August 14, 1972. 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 August 23, 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 October 13, 1977. 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 August 25, 1975. 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 August 14, 1989. 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 September 21, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1973. This polygon shapefile contains ice observations in the Arctic region for July 30, 1973. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1971. This polygon shapefile contains ice observations in the Arctic region for October 11, 1971. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).