一次长江中下游降水增幅的成因分析  

Cause Analysis on Precipitation Enhancement in the Middle and Lower Yangtze Valley

作　　者：黎明[1] 

机构地区：[1]山东省济南市气象局,山东济南250002

出　　处：《安徽农业科学》2010年第34期19652-19654,共3页Journal of Anhui Agricultural Sciences

摘　　要：利用中国气象局MICAPS资料,对长江中下游2008年1月19日降水增幅过程进行了天气动力学方面的成因分析。结果表明,冷暖空气交汇是降水增幅的基本条件;地面倒槽、850～700 hPa暖切变和850～500 hPa低槽是降水增幅的影响系统;西南、东南低空急流是降水增幅的重要动力机制;西南低空急流为降水增幅输送了充沛的水汽。By means of MICAPS data from China Meteorological Administration,the weather dynamics causes of precipitation enhancement in the middle and lower Yangtze Valley on January 19,2008 was analyzed.The results showed that the convergence of cold and warm air was the basic condition of precipitation enhancement,and the influence systems of precipitation enhancement were surface inverse trough,warm shear at the 850-700 hPa and low trough at 850-500 hPa,while southwest and southeast low jet stream were the important dynamic mechanism of precipitation enhancement,and southwest low jet stream transported abundant water vapor for precipitation enhancement.

关 键 词：长江中下游 降水增幅 成因分析 

分 类 号：P458.121[天文地球—大气科学及气象学]