1970. This polygon shapefile contains ice observations in the Arctic region for March 25, 1970. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
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1971. This polygon shapefile contains ice observations in the Arctic region for March 25, 1971. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1974. This polygon shapefile contains ice observations in the Arctic region for March 25, 1974. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1973. This polygon shapefile contains ice observations in the Arctic region for March 26, 1973. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1977. This polygon shapefile contains ice observations in the Arctic region for March 26, 1977. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1979. This polygon shapefile contains ice observations in the Arctic region for March 26, 1979. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for March 26, 1981. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1972. This polygon shapefile contains ice observations in the Arctic region for March 27, 1972. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1980. This polygon shapefile contains ice observations in the Arctic region for March 27, 1980. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1969. Arctic Climate System (ACSYS). This polygon shapefile contains ice observations in the Arctic region for March 28, 1969. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).