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Modification of an empirical short-wave radiation formula using satellite observations
Filetype[PDF-1.29 MB]


Details:
  • Personal Author:
    Clapp, Philip F. (Philip Fanshawe)
  • Corporate Authors:
    National Meteorological Center (U.S.)
  • Description:
    Recent estimates of the brightness and albedo of the earth-atmosphere system, averaged for individual months from meteorological-satellite data, are used to test-and modify a formula for the short-wave radiation budget. The formula is used in a numerical model designed for long-range forecasting experiments. Whereas previously the model formula assumed that the average transmissivity of the clouds is a slowly-varying function of latitude alone, the tests discussed here show that there is a linear-inverse relation between cloudiness and transmissivity. This is due mainly to a strong tendency for the average thickness of the different cloud types, as well as for the relative frequency of the more vertically-developed types, to increase as the monthly-mean cloudiness increases. This modification has an important effect on the heat budget of the earth atmosphere system, and is easy to introduce into the model.

  • Keywords:
  • Document Type:
    Professional Paper
  • Place as Subject:
    United States
  • Collection(s):
    National Weather Service (NWS)
  • Main Document Checksum:
  • Supporting Files:
    No Additional Files
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