2008年7月15日辽宁暴雨等熵分析  

Isentropic Analysis of Rainstorm in Liaoning on July 15th,2008

作　　者：贾旭轩[1] 蒋大凯[1] 张炳川[1] 

机构地区：[1]沈阳中心气象台,辽宁沈阳110016

出　　处：《安徽农业科学》2010年第21期11230-11232,共3页Journal of Anhui Agricultural Sciences

摘　　要：利用2008年7月14日～16日的NCAR/NCEP逐日再分析资料和辽宁省常规自动站降水资料,对于辽宁区域性暴雨天气过程进行等熵分析,根据等熵面上的等压线、等比湿线以及风场的变化特征,得出暴雨落区并且与等压面的分析结果做了对比。结果表明,330K等熵面上的暖湿输送带为暴雨产生提供了丰沛水汽条件,等熵面上气压与风场的分布有助于了解气流的升降。与等压面分析相比,等熵面上的分析更能直观的判断降水落区,预报效果优于等压面分析预报结果。By using the NCAR /NCEP reanalysis data and daily routine of Liaoning Province of AWS precipitation data,the Liaoning regional heavy rainfall were Isentropic analyzed.According to isobaric lines,specific humidity lines and change characteristics of wind field in isentropic surface,derived rain drop zone and with the constant pressure surface analytical results were compared.The results showed that,in 330 K isentropic surface,the conveyor belt of torrential rain produced by warm and wet to provide abundant water vapor conditions,Isentropic surface pressure and wind field distribution help to understand the movements of air currents.Compared with the isobaric surface analysis,Isentropic analysis is more intuitive to judge precipitation zone,prediction is better than the results of isobaric analysis.

关 键 词：等熵面 水汽输送带 等比湿线 

分 类 号：S422[农业科学—植物保护]