1966. This line shapefile contains ice observations in the Arctic region for December 2 1966. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
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1966. This line shapefile contains ice observations in the Arctic region for December 9, 1966. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1966. This line shapefile contains ice observations in the Arctic region for November 25, 1966. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1966. This line shapefile contains ice observations in the Arctic region for October 7, 1966. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
1966. This line shapefile contains ice observations in the Arctic region for December 16, 1966. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, and 1998. Patuxent Wildlife Research Center. This line shapefile portrays the current routes used for conducting Breeding Bird Surveys in the lower 48 States. This layer is part of the 1997-20... National Atlas of the United States.
1966. This line shapefile contains ice observations in the Arctic region for December 23, 1966. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1966. This line shapefile contains ice observations in the Arctic region for November 4, 1966. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).
1966. This line shapefile contains ice observations in the Arctic region for December 30, 1966. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).
1966. This line shapefile contains ice observations in the Arctic region for October 14, 1966. This layer is part of the Arctic Climate System (ACSYS) Hi... Arctic Climate System (ACSYS).