1995. This polygon shapefile contains ice observations in the Arctic region for August 28, 1995. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
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1996. This polygon shapefile contains ice observations in the Arctic region for September 9, 1996. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
2006. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the particulate... United States. Bureau of Transportation Statistics.
1992. This polygon shapefile contains ice observations in the Arctic region for October 5, 1992. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1995. This polygon shapefile contains ice observations in the Arctic region for October 9, 1995. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1986. This polygon shapefile contains ice observations in the Arctic region for May 13, 1986. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
1996. This polygon shapefile contains ice observations in the Arctic region for October 21, 1996. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1996. This polygon shapefile contains ice observations in the Arctic region for September 2, 1996. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1996. This polygon shapefile contains ice observations in the Arctic region for August 26, 1996. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1992. This polygon shapefile contains ice observations in the Arctic region for August 10, 1992. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).