利用NCEP资料对赤峰机场一次雷暴天气的初步分析  

A Preliminary Analysis on a Thunderstorm Weather in Chifeng Airport using NCEP Reanalysis Data

作　　者：朱华东[1] 刘俊姌 

机构地区：[1]民航华北空管局气象中心,北京100621 [2]赤峰玉龙机场航务保障部气象台,内蒙古赤峰024413

出　　处：《内蒙古气象》2015年第2期16-18,共3页Meteorology Journal of Inner Mongolia

摘　　要：文章利用NCEP再分析资料对2013年8月15日发生在赤峰机场的雷暴天气进行了初步分析,揭示了此次雷暴天气的产生机制。结果表明:低空暖式切变和高空槽是本次雷暴天气的触发因子,低空西南急流使辐合加剧并迅速输送了水汽;低空槽前气流的突然增大对对流性天气预报有一定的帮助,特别是低空西南急流的建立,不仅增大了水汽输送的效率,迅速积累了大量不稳定能量,还加剧了急流左侧区域的辐合;对流指数的统计经验阈值对雷暴天气预报有着很好的指示作用,综合分析多种指数使预报效果更好;温度层结差并不能说明没有对流性天气,低空充沛的水汽条件能弥补这一不足。In this paper, a process of thunder storm at the area of Chifeng Airport in 15 Aug,2013 is studied using NCEP reanalyses data, and formative mechanism of the thunder storm event is analyzed. It shows that low altitude warm shear and high altitude trough are trigger factors of this event, low altitude southwest jet stream has enhanced convergence and transported water-vapor quickly;Suddenly increase of low altitude airflow in front of the trough has certain help for convective weather forecast, especially the estab-lishment of the low-level southwest jet, not only increase the efficiency of the water vapor transport, quickly accumulated a large number of unstable energy, also contributed to the convergence of rapids on the left side of the area; Convection index statistics expe-rience threshold of thunderstorm weather forecast has a good indicator of the comprehensive analysis of various index forecast effect is better; Differential temperature stratification does not mean that no convection weather, low abundant water vapor condition can make up for the shortage.

关 键 词：雷暴 急流 指数 

分 类 号：P458.121[天文地球—大气科学及气象学]