Start Date: End Date: Published Date Data Date
Data acquired January 1, 1979 - December 31, 2008 720 x 720 JPEG
Snow and ice play an important role in keeping our planet cool, though not in the way you might think.
Image by Robert Simmon, made with data provided by Mark Flanner, University of Michigan. Caption by Holli Riebeek.
Published May 19, 2011 Data acquired January 1, 1979 - December 31, 2008