摘要
利用银川河东机场日常观测资料以及NCEP再分析资料对2012年7月20日、7月29日2次强雷暴伴强降水过程进行了对比分析.结果表明,西太平洋副热带高压迅速西伸至西北地区东部,有利于西南暖湿气流向河东机场的输送,为河东机场强对流天气的发生、发展和持续提供了充沛的水汽和不稳定能量;中低层低涡与河东机场强对流天气有着重要的关系,配合低层有暖平流时,容易诱发河东机场强对流天气;冷空气的侵入速度以及强度,决定着河东机场雷暴天气发生时的强度以及持续时间.
Through the conventional observational data and the NCEP data of Yinchuan Hedong Airport,two thunderstorms and heavy precipitation weather processes were comparative analyzed,which occurred in July 20 and 29,2012.The results showed that it is propitious for the water vapor and instability energy transport to Hedong Airport area when the West Pacific subtropical high moves rapidly to the northwest part of China,and occurs easily.The middle and low layer vortex are closely relations to severe convection weather process in Hedong Airport area.Especially,when the warm advection exits in low layer,it is easy to cause severe convection weather process in Hedong Airport area.The speed and the intension of invasion of cold air determine the intension and the duration of severe convection weather process.
出处
《宁夏工程技术》
CAS
2013年第3期219-224,共6页
Ningxia Engineering Technology
关键词
雷暴
副热带高压
暖平流
低涡
thunderstorm
west pacific subtropical high
warm advection
vortex
