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1

Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China

2

Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Institute of Heavy Rain, CMA, Wuhan 430205, China

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Wuhan Central Meteorological Observatory, Wuhan 430074, China

4

Xiamen Meteorological Bureau, Xiamen 361012, China

5

Shanghai Center for Satellite Remote Sensing Applications, Shanghai 201199, China





*

Author to whom correspondence should be addressed.



Academic Editor: Robert W. Talbot

Abstract Multiple wind retrieval algorithms are performed to retrieve wind fields, based on which radar reflectivity is extrapolated to implement nowcasting. The frequently used nowcasting algorithm COTREC continuity of tracking radar echo by correlation, based on the reflectivity and wind retrieval algorithm GVAD gradient velocity azimuth display, based on radial velocity are used. The wind fields retrieved by the two methods are taken as motion vectors to give a 60-min forecast of radar reflectivity. Comparison analysis on precipitation events shows that GVAD can be used in operational nowcasting as COTREC performs and for stable precipitation duration, COTREC gives better nowcasting results than GVAD, while, for evolving precipitation duration, GVAD gives better nowcasting results than COTREC. View Full-Text

Keywords: Doppler weather radar; wind retrieval; COTREC; GVAD; nowcasting Doppler weather radar; wind retrieval; COTREC; GVAD; nowcasting





Autor: Nan Li 1,2,* , Ming Wei 1, Ben Niu 3, Jiawen Pan 4, Wengang Zhang 2 and Wei Guo 5

Fuente: http://mdpi.com/



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