1993. This polygon shapefile contains ice observations in the Arctic region for January 11, 1993. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
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1912. Rand McNally and Company. Relief shown by hachures.; Includes inset: Southern portion of Chile and Argentine Republic.; Page 39 and 40 of "Library Atlas of the World." 47 x ... Rand, McNally & Co (Chicago), 1912.
1993. This polygon shapefile contains ice observations in the Arctic region for April 13, 1993. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1993. This polygon shapefile contains ice observations in the Arctic region for April 19, 1993. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for July 24, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for July 27, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for July 28, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for July 29, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for July 30, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1998. This polygon shapefile contains ice observations in the Arctic region for July 31, 1998. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).