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Keywords = GVAD

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16 pages, 1470 KiB  
Article
Application of Multiple Wind Retrieval Algorithms in Nowcasting
by Nan Li, Ming Wei, Ben Niu, Jiawen Pan, Wengang Zhang and Wei Guo
Atmosphere 2015, 6(6), 834-849; https://doi.org/10.3390/atmos6060834 - 18 Jun 2015
Cited by 3 | Viewed by 4834
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 [...] Read more.
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. Full article
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