Plateau Meteorology

Plateau Meteorology >

2016 , Vol. 35 >Issue 1: 143 - 157

DOI: https://doi.org/10.7522/j.issn.1000-0534.2014.00094

Comparative Analysis of Mesoscale Characteristics between Two MCSs of A Torrectial Rain in Jiangxi Province

  • WANG Xiaokang ,
  • ZHAO Yuchun ,
  • WANG Xiaofang ,
  • LIAO Yishan ,
  • XU Ming
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  • Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Institute of Heavy Rain, China Meteorological Administration, Wuhan 430074, China;2. State key laboratory of severe weather, Beijing 100081, China

Received date: 2014-03-29

  Online published: 2016-02-28

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Abstract

Using of the satellite TBB data,Doppler radar data,and the results of WRF mesoscale non-hydrostatic model,compared the characteristics of two mesoscale convective systems(MCS) with similar Black Body Temperature(TBB) value but quite different surface precipitation in the heavy rainfall in Jiangxi province on 19 June 2010.The results showed that in beneficial water vapor,dynamic and thermal conditions,newborn convective cell grows to strong mesoscale convective system(MCS1).Wind field present convergent in the middle and lower layer and divergent in the higher layer.Cyclonic vortex develops from ground surface to 150 hPa.Plenty water vapor is transported to mid-high layer in the troposphere by vertical upward motion in convective cloud column,causing content of liquid cloud water and cloud ice increased and overlap layer of them deepened.Then total water substances content increase,causing low TBB value and heavy surface rainfall.Weak convergence in middle layer cause the content of water vapor convergence and total liquid water substances of MCS2 are significantly less than MCS1,so only weak surface rainfall occur.But in high troposphere,the cloud ice content and radar reflectivity in tailing stratus cloud of MCS2 is similar to the cloud ice content and radar reflectivity in convective cloud of MCS1 respectively,so the satellite TBB value of MCS2 is similar to MCS1.

Key words： Torrential rain; Mesoscale convective; TBB data; WRF model

Cite this article

WANG Xiaokang , ZHAO Yuchun , WANG Xiaofang , LIAO Yishan , XU Ming . Comparative Analysis of Mesoscale Characteristics between Two MCSs of A Torrectial Rain in Jiangxi Province[J]. Plateau Meteorology, 2016 , 35(1) : 143 -157 . DOI: 10.7522/j.issn.1000-0534.2014.00094

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