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  2015, Vol. 34 Issue (2): 401-412    DOI: 10.7522/j.issn.1000-0534.2013.00204
    
Analysis of Equation for Convective Vorticity Vector during a Torrential Rainfall Process in Meiyu Season of 2011
QING Tao1, SHEN Xinyong1,2, HUANG Wenyan1, HUANG Mingce1
1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
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Abstract  Using NCEP FNL analysis data, black body temperature from FY-2E satellite, conventional and auto-metrological stations' observational precipitation data, and simulation output from high-resolution mesoscale model WRF V3.3 to analyze a precipitation process in Jiang-Huai valley in June 2011. Analysis results show that the simulation results are in good agreement with the observations when comparing the precipitation between simulations and observations and reproduce the precipitation process well. This precipitation process was controlled and influenced by the surface low and Meiyu front systems. Period from 14 to 15 June is the mature phase of whole precipitation process, and the most significant character of this period is that many mesoscale convective systems move and develop along the Meiyu front. To investigate how MCS impacts on Meiyu front and torrential rainfall, convective vorticity vector and its vertical component tendency equation were employed to analyze. The result shows that local variation for the vertical component was influenced by the diabatic term, and the relationships among diabatic heating, secondary circulation and Meiyu frontogenesis imply a CISK-like response between MCS and Meiyu frontogenesis. So as a good atmospheric variable, the convective vorticity vector, especially, the vertical component can be used to diagnose and reveal the relationship between MCS associated with diabatic heating and Meiyu frontogenesis.
Key words:  Torrential rainfall      Convective vorticity vector      Diabatic heating      Meiyu frontogenesis     
Received:  18 March 2013      Published:  24 April 2015
P458.1+21.1  

Cite this article: 

QING Tao, SHEN Xinyong, HUANG Wenyan, HUANG Mingce. Analysis of Equation for Convective Vorticity Vector during a Torrential Rainfall Process in Meiyu Season of 2011. , 2015, 34(2): 401-412.

URL: 

http://www.gyqx.ac.cn/EN/10.7522/j.issn.1000-0534.2013.00204     OR     http://www.gyqx.ac.cn/EN/Y2015/V34/I2/401

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