Professional Paper 1386–A
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Figure 4.—A, National Oceanic and Atmospheric Administration National Environmental Satellite, Data, and Information Service (NOAA NESDIS) snow map. 1–7 March 1976; B, NOAA NESDIS Interactive Multisensor Snow and Ice Mapping System (IMS) snow map, 23 January 2006. Snow cover is shown in white; sea and lake ice is shown in dark blue.