气象与环境科学
氣象與環境科學
기상여배경과학
METEOROLOGICAL AND ENVIRONMENTAL SCIENCES
2012年
1期
62-66
,共5页
大冰雹%高空冷涡%横槽%雷达回波特征
大冰雹%高空冷渦%橫槽%雷達迴波特徵
대빙박%고공랭와%횡조%뢰체회파특정
large hail%high-altitude cold vortex%horizontal tank%the radar echo characteristics
利用常规资料和多普勒雷达资料,分析了2011年6月24日洛阳嵩县冰雹天气过程。结果表明:高空横槽转竖,干冷空气入侵,中低层强的偏东风辐合,暖湿气流辐合上升,为冰雹的发生提供了有利的动力和水汽条件;高空冷平流,低层暖平流,为强对流性天气的发生提供了不稳定层结;适宜于冰雹生成发展的0℃层高度,指示有利于对流发展的各类指数,为冰雹的分析预报提供了较好的依据;早期的雷达回波信号及其所带来的天气,为提前对强对流天气性质正确判断和监测预警提供了较好的参考信息;强度〉55dBz的回波高度高于-20℃层高度,VIL值〉60kg/m^2,回波顶高〉12km,有中气旋出现等,是降雹的可靠信号。
利用常規資料和多普勒雷達資料,分析瞭2011年6月24日洛暘嵩縣冰雹天氣過程。結果錶明:高空橫槽轉豎,榦冷空氣入侵,中低層彊的偏東風輻閤,暖濕氣流輻閤上升,為冰雹的髮生提供瞭有利的動力和水汽條件;高空冷平流,低層暖平流,為彊對流性天氣的髮生提供瞭不穩定層結;適宜于冰雹生成髮展的0℃層高度,指示有利于對流髮展的各類指數,為冰雹的分析預報提供瞭較好的依據;早期的雷達迴波信號及其所帶來的天氣,為提前對彊對流天氣性質正確判斷和鑑測預警提供瞭較好的參攷信息;彊度〉55dBz的迴波高度高于-20℃層高度,VIL值〉60kg/m^2,迴波頂高〉12km,有中氣鏇齣現等,是降雹的可靠信號。
이용상규자료화다보륵뢰체자료,분석료2011년6월24일락양숭현빙박천기과정。결과표명:고공횡조전수,간랭공기입침,중저층강적편동풍복합,난습기류복합상승,위빙박적발생제공료유리적동력화수기조건;고공랭평류,저층난평류,위강대류성천기적발생제공료불은정층결;괄의우빙박생성발전적0℃층고도,지시유리우대류발전적각류지수,위빙박적분석예보제공료교호적의거;조기적뢰체회파신호급기소대래적천기,위제전대강대류천기성질정학판단화감측예경제공료교호적삼고신식;강도〉55dBz적회파고도고우-20℃층고도,VIL치〉60kg/m^2,회파정고〉12km,유중기선출현등,시강박적가고신호。
By use of conventional data and Doppler radar data, the hail process on the June 24, 2011 in Luoyang Song county was analyzed. The results show that the heavy hail is due to high-altitude vertical cross-slot switch, dry cold air intrusion, strong easterly winds in the low-level convergence, con- vergence of warm air rise, which provides favorable power and water vapor conditions for the occurrenceof hail. The high-altitude cold advection, low-level warm advection, provides unstable stratification for the occurrence of severe convective weather. The 0 ℃ layer height which is suitable for the development and generated of hail, the various types of index which is conducive to the convection development, pro- vides a good basis for the analysis and prediction of hail. The early radar echo signal caused by the weather provides reference information for judging convective weather nature and monitoring and early warning. The intensity over 55 dBz echo height is higher than - 20℃height, VIL values is over 60 kg/ m^2, echo top height is over 12 km and mesocycyclone is appear are reliable hail signal.