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1 Goddard Laboratory for Atmospheric Sciences, NASA/Goddard Space Flight Center, Greenbelt, MD 20771.2 National Center for Atmospheric Research, Boulder, CO 80307. (The National Center for Atmospheric Research is funded by the National Science Foundation.)3 Department of Meteorology, Pennsylvania State University, University Park, PA 16802.4 NOAA/WPL, Boulder, CO 80302.
Randall et al. (Sat,) studied this question.