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Detailed Reference Information |
Vaughan, G. and Worthington, R.M. (2000). Effects of humidity and precipitation on VHF radar vertical beam echoes. Radio Science 35: doi: 10.1029/1999RS002260. issn: 0048-6604. |
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We investigate in this paper the variation in power of VHF radar vertical echoes as a function of atmospheric humidity. We find that the echoes are greatest in air of moderate (30--70%) humidity, and least in very dry or near-saturated air. Compared to moderate humidities, the standard model for radar echoes, based on potential refractivity, overpredicts the echo power at high relative humidity by ~10 dB. We propose that this is due to the effect of precipitation in suppressing small-scale humidity gradients. A model which assumes complete suppression underpredicts the observed power drastically, showing that precipitation can only remove a part of the small-scale structure in refractivity which is caused by fluctuations in humidity. ¿ 2000 American Geophysical Union |
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Abstract |
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Keywords
Meteorology and Atmospheric Dynamics, Remote sensing, Meteorology and Atmospheric Dynamics, Instruments and techniques, Radio Science, Radar atmospheric physics |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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