Radar signal intensity from different levels in steady snow,
by Raymond Wexler and Pauline M. Austin.
Description
- Language(s)
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English
- Published
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Cambridge, M.I.T. Dept. of Meteorology, [1954]
- Summary
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Introduction: In this study deductions concerning the growth of snow crystals are made from measurements of the radar echo from steady snow at various levels in the atmosphere. Cunningham (1) used radar observations to help in formulating a hypothesis for the growth and melting of snowflakes and the subseauent growth of the water drops in a particular storm. In his study the radar observations were of a qualitative nature, since they consisted of photographs of the RHI scope. The theory of the variation with elevation of the radar echo intensity in widespread steady precipitation was analyzed by Wexler (2) and comparison was made with radar observations of warm front precipitation by Browne at Cambridge University, England. The theory is repeated here with modification. The intensity of the radar signal from precipitation is dependent upon the size, shape, number and composition (ice or water) of the scattering particles. All of these various characteristics cannot be learned from the radar measurements alone but useful deductions can be made when other available information, such as radiosonde and wind data, is considered in conjunction with the radar observations. In particular, because of the sensitive dependence of radar reflectivity upon particle size, it appears reasonable to attempt to interpret an increase in radar signal strength in terms of particle growth.
- Note
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"March 1, 1954."
- Physical Description
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27 pages
illustrations
28 cm
Viewability
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University of Illinois at Urbana-Champaign
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