1971. This polygon shapefile contains ice observations in the Arctic region for January 18, 1971. 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 January 18, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1979. This polygon shapefile contains ice observations in the Arctic region for January 18, 1979. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1976. This polygon shapefile contains ice observations in the Arctic region for January 19, 1976. 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 January 19, 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 January 19, 1981. 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 January 2, 1973. 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 January 20, 1972. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1975. This polygon shapefile contains ice observations in the Arctic region for January 20, 1975. 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 January 20, 1977. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).