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1980. This polygon shapefile contains ice observations in the Arctic region for June 16, 1980. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1971. This polygon shapefile contains ice observations in the Arctic region for December 9, 1971. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1970. This polygon shapefile contains ice observations in the Arctic region for June 25, 1970. 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 November 16, 1972. 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 May 10, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
1970. This polygon shapefile contains ice observations in the Arctic region for July 2, 1970. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
1975. This polygon shapefile contains ice observations in the Arctic region for June 26, 1975. 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 October 19, 1981. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1989. This polygon shapefile contains ice observations in the Arctic region for May 15, 1989. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for November 17, 1978. This polygon shapefile contains ice observations in th... Arctic Climate System (ACSYS).