華南及鄰近地區中尺度對流系統之研究

A Study of Mesoscale Convective System in the southern China and Its Vicinity

丘台光(Tai-Kung Chiou) ； 廖學鎰(Shyne-Yih Liao)

《大氣科學》 11卷1期 (1984/03) Pp. 85-99

摘要

On the basis of the definition of the mesoscale convective system, TBB＜-32°C and horizortal scale ＞200KM, two evident cases occured in the Southern China and its vicinity duving the period of 1981 and 1982 are analyzed in detail.The similar method whick Maddox took to analyze MCC in 1981 is adopted in this study. The meteorological images, redar images, surface and air sounding data are used to study the associated meteorological condition and structure of mesoscale convective system. The MCC in the States and the MCC in the Southern china are therefore compared.The results reveal that the favorable meteorological conditions of mesoscale convective system in the Southern China and its vicinity are lower level jet stream, continuous and strong warm advection, short trough and the convergence of southerly warm-humid air and northly cold-dry air, The precipitation outflow of convective cells or the interaction between the precipitation outflow and cold front is very important triggering factor whick affected the genesis, development of the mesoscale conective system.

並列摘要

On the basis of the definition of the mesoscale convective system, TBB＜-32°C and horizortal scale ＞200KM, two evident cases occured in the Southern China and its vicinity duving the period of 1981 and 1982 are analyzed in detail.The similar method whick Maddox took to analyze MCC in 1981 is adopted in this study. The meteorological images, redar images, surface and air sounding data are used to study the associated meteorological condition and structure of mesoscale convective system. The MCC in the States and the MCC in the Southern china are therefore compared.The results reveal that the favorable meteorological conditions of mesoscale convective system in the Southern China and its vicinity are lower level jet stream, continuous and strong warm advection, short trough and the convergence of southerly warm-humid air and northly cold-dry air, The precipitation outflow of convective cells or the interaction between the precipitation outflow and cold front is very important triggering factor whick affected the genesis, development of the mesoscale conective system.