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影响山东的台风暴雨天气的湿位涡诊断分析
引用本文:赵宇,杨晓霞,孙兴池.影响山东的台风暴雨天气的湿位涡诊断分析[J].气象,2004,30(4):15-19.
作者姓名:赵宇  杨晓霞  孙兴池
作者单位:山东省气象台,济南,250031
摘    要:应用湿位涡理论 ,对发生在山东境内由台风和台风减弱的低压引发的两场大暴雨过程进行诊断。结果表明 :这两场暴雨都产生在θe 陡立密集区附近 ,θe 陡立密集区附近易导致湿斜压涡度发展 ;对流层中低层MPV1 <0 ,850hPa上MPV2 >0 ,综合反映了暴雨区对流不稳定和斜压不稳定的发展 ;对流层高层高值湿位涡下传 ,有利于位势不稳定能量的储存和释放 ,使降水增幅。

关 键 词:湿位涡  倾斜涡度发展  台风暴雨

A Diagnostic Analysis of Moist Potential Vorticity for Typhoon Heavy Rain in Shandong Province
Zhao Yu,Yang Xiaoxia,Sun Xingchi.A Diagnostic Analysis of Moist Potential Vorticity for Typhoon Heavy Rain in Shandong Province[J].Meteorological Monthly,2004,30(4):15-19.
Authors:Zhao Yu  Yang Xiaoxia  Sun Xingchi
Abstract:By using the theory of moist potential vorticity(MPV),the characteristics of MPV are analyzed in the process of two rainstorms caused by typhoon or weaken typhoon circulation in Shandong Province. The results show that the two heavy rain events occurred in the very stiff and dense section of moist isentropes, which can lead to the development of moist slantwise vorticity. MPV1<0 and MPV2>0 in the low troposphere reflect the development of convective and baroclinic instability . The downward spread of high from the upper troposphere is also of an advantage to the release and deposit of instability energy and the results in the amplification of rainstorm.
Keywords:moist potential vorticity  slantwise vorticity development  typhoon rainstorm
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