1967. This polygon shapefile contains ice observations in the Arctic region for September 23, 1967. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
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1975. This polygon shapefile contains ice observations in the Arctic region for October 11, 1975. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1982. This polygon shapefile contains ice observations in the Arctic region for September 19, 1982. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1988. This polygon shapefile contains ice observations in the Arctic region for September 12, 1988. 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 August 26, 1968. 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 September 3, 1977. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1991. This polygon shapefile contains ice observations in the Arctic region for September 30, 1991. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1975. This polygon shapefile contains ice observations in the Arctic region for September 22, 1975. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1972. This polygon shapefile contains ice observations in the Arctic region for August 10, 1972. 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 October 15, 1974. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).