1977. This polygon shapefile contains ice observations in the Arctic region for November 15, 1977. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
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1973. This polygon shapefile contains ice observations in the Arctic region for August 6, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1967. This polygon shapefile contains ice observations in the Arctic region for June 17, 1967. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1989. This polygon shapefile contains ice observations in the Arctic region for May 2, 1989. This layer is part of the Arctic Climate System (ACSYS) Hist... Arctic Climate System (ACSYS).
1970. This polygon shapefile contains ice observations in the Arctic region for December 10, 1970. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1968. This polygon shapefile contains ice observations in the Arctic region for July 15, 1968. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1970. This polygon shapefile contains ice observations in the Arctic region for December 23, 1970. 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 June 10, 1971. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1982. This polygon shapefile contains ice observations in the Arctic region for August 17, 1982. 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 18, 1973. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).