1978. This polygon shapefile contains ice observations in the Arctic region for September 13, 1978. This polygon shapefile contains ice observations in t... Arctic Climate System (ACSYS).
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1988. This polygon shapefile contains ice observations in the Arctic region for September 19, 1988. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1980. This polygon shapefile contains ice observations in the Arctic region for August 31, 1980. 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 October 4, 1976. 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 May 27, 1966. This layer is part of the Arctic Climate System (ACSYS) Histor... Arctic Climate System (ACSYS).
1968. This polygon shapefile contains ice observations in the Arctic region for September 2, 1968. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1972. This polygon shapefile contains ice observations in the Arctic region for October 2, 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 September 16, 1976. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1979. This polygon shapefile contains ice observations in the Arctic region for October 1, 1979. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1988. This polygon shapefile contains ice observations in the Arctic region for October 3, 1988. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).