一次豫东暖区暴雨特征分析
Analysis on the Rainstorm Characteristics of Warm Region in the Eastern Henan Province
康庄 1康邵钧2
作者信息
- 1. 河南省虞城县气象局,河南虞城 476300
- 2. 河南省商丘市气象局,河南商丘 476000
- 折叠
摘要
利用常规气象资料、数值预报产品、卫星云图和雷达回波等观测资料,从环流特征、影响系统、物理量场等方面,对2016年7月19-20日豫东地区一次暴雨特征进行分析.结果表明,此次暴雨主要有暖区对流降水造成,范围广,强度大,主要影响系统有副热带高压、低涡、切变线和低空急流等.动力条件有低层正涡度增大,辐合加强,有利于上升运动.西南和东南急流提供充沛水汽,暖云层和湿层厚,层结不稳定,降水效率高,雨强大.云图表现为斜压叶状云系,雷达为多单体涡带状回波.
Abstract
Using the observation data such as conventional meteorological data, numerical forecast products, satellite cloud images and radar echoes, the characteristics of rainstorms in the eastern Henan Province during July 19-20,2016 were analyzed from the aspects of circulation characteristics, influence system and physical field.The results showed that the rainstorm was mainly caused by the convective precipitation in the warm area.The range was wide and the intensity was large.The main influence systems were subtropical high, low vortex, shear line and low level jet.The dynamic condition was that the positive vorticity of the lower layer increases, and the convergence was enhanced, which was favorable for the ascending motion.Southwest and Southeast jet provided abundant water vapor, warm clouds and wet layer thick, unstable stratification, high precipitation efficiency, strong rain.Cloud was the baroclinic leaflike structures, and radar was single vortex band echo.
关键词
暖区暴雨/环流特征/影响系统/卫星云图/雷达回波/物理量场Key words
Warm rainstorm/Circulation characteristics/Influence system/Satellite cloud image/Radar echo/Physical field引用本文复制引用
基金项目
河南省科技攻关计划项目(162102110025)
商丘市科技成果转化项目(152007)
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据