1975. This polygon shapefile contains ice observations in the Arctic region for August 7, 1975. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
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1985. This polygon shapefile contains ice observations in the Arctic region for July 29, 1985. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for September 28, 1981. 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 3, 1973. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1971. This polygon shapefile contains ice observations in the Arctic region for September 13, 1971. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1971. This polygon shapefile contains ice observations in the Arctic region for August 17, 1971. 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 6, 1973. 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 29, 1977. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1971. This polygon shapefile contains ice observations in the Arctic region for August 20, 1971. 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 July 28, 1972. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).