1985. This polygon shapefile contains ice observations in the Arctic region for August 18, 1985. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
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1985. This polygon shapefile contains ice observations in the Arctic region for August 12, 1985. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1985. This polygon shapefile contains ice observations in the Arctic region for October 22, 1985. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
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, and 2008. International Heat Flow Commission, International Association of Seismology and Physics of the Earth's Interior, and Oklahoma State University. Department of Geography. Cartography Service. This point shapefile contains heat flow data for China compiled from sources dating from 1981 to 2008. Heat flow is a measure of heat loss across t... International Heat Flow Commission.
1985. This polygon shapefile contains ice observations in the Arctic region for October 14, 1985. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1985. This polygon shapefile contains ice observations in the Arctic region for October 8, 1985. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, and 1994. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This polygon shapefile shows the boundaries of geologic units within the United States. This layer is part of the Geologic Map of the United States... Geological Survey (U.S.).
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.
1985. This polygon shapefile contains ice observations in the Arctic region for October 1, 1985. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1985. This polygon shapefile contains ice observations in the Arctic region for September 23, 1985. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).