1973. This polygon shapefile contains ice observations in the Arctic region for February 8, 1973. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
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1976. This polygon shapefile contains ice observations in the Arctic region for February 9, 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 February 9, 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 9, 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 January 10, 1972. 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 10, 1977. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1980. This polygon shapefile contains ice observations in the Arctic region for January 10, 1980. 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 11, 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 11, 1979. 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 12, 1978. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).