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1975. This polygon shapefile contains ice observations in the Arctic region for July 21, 1975. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for July 21, 1978. This polygon shapefile contains ice observations in the Ar... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for July 21, 1981. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1997. This polygon shapefile contains ice observations in the Arctic region for July 21, 1997. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for July 21, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1999. This polygon shapefile contains ice observations in the Arctic region for July 21, 1999. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
2000. This polygon shapefile contains ice observations in the Arctic region for July 21, 2000. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1966. This line shapefile contains ice observations in the Arctic region for July 22, 1966. This layer is part of the Arctic Climate System (ACSYS) Histo... Arctic Climate System (ACSYS).
1967. This polygon shapefile contains ice observations in the Arctic region for July 22, 1967. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1968. This polygon shapefile contains ice observations in the Arctic region for July 22, 1968. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).