1983. This polygon shapefile contains ice observations in the Arctic region for September 25, 1983. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
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1976. This polygon shapefile contains ice observations in the Arctic region for August 10, 1976. 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 August 2, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1971. This polygon shapefile contains ice observations in the Arctic region for September 23, 1971. 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 September 10, 1973. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
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).