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Title: Monitoring of boundary layer winds using a lower atmospheric wind profiler
Authors: Reddy, K Krishna
Ohno, Yuichi
Keywords: Wind profiler;MST radar;Tropospheric weather;Weather prediction
Issue Date: Dec-2003
Publisher: NISCAIR-CSIR, India
Abstract: An L-band (1357.5 MHz) lower atmospheric wind profiler (LAWP) has been installed and successfully operated at Gadanki, India, since September 1997. First results of the accuracy, can be given on the basis of about 24 days intercomparisons between LA WP and Indian MST radar data. The root mean square differences (r.m.s. deviation) have been found to range between 1.18 m/s and 1.6 m/s for the wind speed. The two wind profilers compliment each other quite well, considering both the availability and the reliability of the wind measurements. Statistics of the data availability are shown based on 342-days data both in low mode and high mode. The 80% availability of the LAWP was determined with wind measurements of 3.6 km in low mode and 5 km in high mode. It means that the Gadanki-LA WP is also capable of yielding quality data to support the study of severe weather. The presence of abundant amount of moisture in the lower and middle troposphere during summer monsoon enabled good measurements up to about 6 km height, a range much greater than the dry season. The results indicate that the LAWP could help improve the understanding of the atmospheric processes involved in severe weather (mesoscale convective systems, tropical cyclone and storms) in the tropical region.
Page(s): 360-372
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections: IJRSP Vol.32(6) [December 2003]

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