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2. National Centers for Environmental Prediction. http://www.ncep.noaa.gov/ (last accessed: July 2010).
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4. The National Center for Atmospheric Resource. http://www.ncar.ucar.edu/ (last accessed: July 2010).
5. Global change master directory. http://gcmd.nasa.gov/Resources/pointers/meteo_university.html (last accessed: July 2010).