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1993. This polygon shapefile contains ice observations in the Arctic region for September 13, 1993. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1999. This polygon shapefile contains ice observations in the Arctic region for September 13, 1999. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
2000. This polygon shapefile contains ice observations in the Arctic region for September 13, 2000. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
2001. This polygon shapefile contains ice observations in the Arctic region for September 13, 2001. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
2002. This polygon shapefile contains ice observations in the Arctic region for September 13, 2002. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1972. This polygon shapefile contains ice observations in the Arctic region for September 14, 1972. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1977. This polygon shapefile contains ice observations in the Arctic region for September 14, 1977. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1987. This polygon shapefile contains ice observations in the Arctic region for September 14, 1987. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for September 14, 1998. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1999. This polygon shapefile contains ice observations in the Arctic region for September 14, 1999. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).