气象与环境学报Issue(6)：25-30,6.DOI:10.3969/j.issn.1673-503X.2014.06.004
一次西南涡暴雨的等熵位涡特征分析
Analysis of isentropic potential vorticity for a heavy rain caused by a southwestern low vortex
摘要
Abstract
Based on the conventionally meteorological data and GFS reanalysis data with 0.5 °×0.5 °resolution,a heavy rainstorm on July 19,2010 caused by a southwest low vortex in Hebei province and Shandong province were analyzed,including its forming conditions and evolution of isentropic potential vorticity.The results show that the southwestern low vortex,high jet,low jet and surface low pressure are the main weather systems of this process. The evolution and forming of isentropic potential vorticity are indicative to activity status of cold air.Convergence of airflow on both south and north sides of the isentropic potential vorticity center is favorable to development of surface low pressure.High potential vorticity moves downward,which leads to the heavy rain.Precipitation area has a better corresponding relationship with area of large isentropic potential vorticity values and its moving direc-tion.关键词
西南涡/暴雨/等熵位涡/垂直结构Key words
Southwestern low vortex/Heavy rain/Isentropic potential vorticity/Vertical structure分类
天文与地球科学引用本文复制引用
田秀霞,何丽华,陈笑娟..一次西南涡暴雨的等熵位涡特征分析[J].气象与环境学报,2014,(6):25-30,6.基金项目
公益性行业（气象）专项“东北、华北暴雨发生发展特点及预报技术研究”（GYHY200906011）和河北省暴雨创新团队项目共同资助。 （）
