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1977. This polygon shapefile contains ice observations in the Arctic region for October 20, 1977. 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 October 25, 1977. 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 October 8, 1977. 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 September 10, 1977. 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).
1977. This polygon shapefile contains ice observations in the Arctic region for September 21, 1977. 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 29, 1977. 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 3, 1977. 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 September 6, 1977. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, and 2014. U.S. Fish and Wildlife Service. This polygon shapefile represents the extent, approximate location and type of wetlands and deepwater habitats in the Northeastern United States be... U.S. Fish and Wildlife Service.