1968. This polygon shapefile contains ice observations in the Arctic region for September 23, 1968. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
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1987. This polygon shapefile contains ice observations in the Arctic region for October 5, 1987. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1974. This polygon shapefile contains ice observations in the Arctic region for August 12, 1974. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1985. This polygon shapefile contains ice observations in the Arctic region for October 22, 1985. 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 September 30, 1968. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1967. This polygon shapefile contains ice observations in the Arctic region for September 2, 1967. 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 October 7, 1967. 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 July 26, 1977. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1970. This polygon shapefile contains ice observations in the Arctic region for October 1, 1970. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1966. This line shapefile contains ice observations in the Arctic region for September 2, 1966. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).