1976. This polygon shapefile contains ice observations in the Arctic region for February 23, 1976. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
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1977. This polygon shapefile contains ice observations in the Arctic region for February 23, 1977. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for February 23, 1978. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for February 23, 1981. 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 February 24, 1972. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1967. This polygon shapefile contains ice observations in the Arctic region for February 25, 1967. 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 February 25, 1968. 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 February 25, 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 February 25, 1971. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1974. This polygon shapefile contains ice observations in the Arctic region for February 25, 1974. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).