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The 404 MHZ wind profiler to observe precipitation

Singh, N and Joshi, RR and Damle, SH and Pant, GB (2012) The 404 MHZ wind profiler to observe precipitation. Current Science, 103 (1). pp. 46-54.

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This article delineates the tropical precipitation and classification of precipitating systems into stratiform and convective type, using the UHF wind profiler located at the Indian tropical station Pune (18°32'N, 73°51'E). Under moderate rain conditions the two signals arising due to clear air motions and precipitation are clearly distinguished in the power spectra. An algorithm with suitable methodology has been developed that separates clear air and precipitation echoes when they are clearly distinguishable as seen in the power spectrum. This was tested for various power spectra and found to work well under moderate rain conditions. The sensitivity of the threshold was tested for the precipitation observed on 25 July 2005. In addition, case studies of stratiform rain (precipitation observed over the site on 26 July 2005, 0800 h IST) and convective system (a thunderstorm observed on 16 May 2004) are presented and discussed. An attempt has been made to fit a Gaussian distribution curve to determine the actual Doppler shift and spectral width. The observed convective and stratiform precipitation is described in terms of reflectivity, maximum spectral width and Doppler velocity gradient in the vertical.

Item Type: Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 07 Jun 2014 07:03
Last Modified: 07 Jun 2014 07:03

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