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  2015, Vol. 34 Issue (2): 526-533    DOI: 10.7522/j.issn.1000-0534.2013.00188
    
Study on the Relationship Between Mesoscale Wind Field Changes and Rainstorm Using Windprofiler Data
ZHOU Xinyu1, LIAO Fei1,2, SUN Guangfeng1
1. Guangzhou Meteorological Observatory, Guangzhou 510080, China;
2. Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou 510080, China
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Abstract  By using the windprofiler data, this paper studies the relationship between mesoscale wind field changes and rainstorm. Firstly, it is indicated that the high spatial and temporal resolution data can clearly reveal the effect of mesoscale wind filed changes such as low-level jet and low-level wind shear before the heavy precipitation happens. Before the heavy precipitation happens, the strong wind field and the momentum continuously go downstream, making the low-level positive vorticity increase, with the warm and humid air, trigger the precipitation. Secondly, an index I is designed to represent the intensity and height of the low-level jet, the index will increase rapidly before the heavy precipitation. Thirdly, the low-level vertical wind shear increases significantly, and it plays a significant role in triggering the generation of heavy precipitation.
Key words:  Windprofiler      Rainstorm      Low-level jet      Vertical wind shear     
Received:  07 January 2013      Published:  24 April 2015
P458.1+1  
Articles by authors
ZHOU Xinyu
LIAO Fei
SUN Guangfeng

Cite this article: 

ZHOU Xinyu, LIAO Fei, SUN Guangfeng. Study on the Relationship Between Mesoscale Wind Field Changes and Rainstorm Using Windprofiler Data. , 2015, 34(2): 526-533.

URL: 

http://www.gyqx.ac.cn/EN/10.7522/j.issn.1000-0534.2013.00188     OR     http://www.gyqx.ac.cn/EN/Y2015/V34/I2/526

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