###
DOI:
本文二维码信息
上海地区暖季午后对流的雷达气候学特征分析
管理
(上海中心气象台)
Radar Climatology Analysis of Warm Season Afternoon Convective Storm over Shanghai
Guan Li
(Shanghai Central Meteorological Observato)
摘要
相似文献
本文已被:浏览 109次   下载 20
投稿时间:2019-09-15    修订日期:2020-10-30
中文摘要: 本文利用探空资料和客观分析产品(风暴追踪(STI)和风暴结构(SS)),对2014—2018年上海地区暖季(6—9月)弱天气尺度系统强迫下局地对流的环境因子参数、风暴空间分布和回波三维结构进行了气候学统计分析。风暴追踪产品提供风暴位置、风暴历史路径等信息,利用风暴位置统计了暖季上海不同区域午后对流发生频次,同时利用风暴历史路径统计风暴移动的轨迹频次的空间分布,进而分析弱天气尺度系统强迫下上海午后对流的触发原因。结合风暴位置和历史路径将局地风暴划分为外部移入型、局地新生移动型和局地新生少动型三类风暴,利用对应的风暴结构产品统计比较了两类风暴的回波三维结构特征。研究结果表明:影响上海的午后对流主要发生在中心城区至长江口区域,其主要成因为城市热岛和北支海风锋;同时三类风暴在质心高度、垂直液态水含量方面存在较明显差异。
Abstract:During the warm season ( June–September ) from 2014 to 2018, the sounding parameters and indices of convention as well as the spatial characteristics and distributions of afternoon convective storms in Shanghai under weak synoptic-scale forcing are documented using atmospheric sounding data, storm tracking identification (STI) and storm structure (SS). The STI product provides the storm’s current position and the historical position. Storm frequency statistics in different region is made utilizing the storm position firstly, then use the storm historical position to statistics the spatial distribution of storm track .So as to analysis the trigger mechanism in Shanghai under weak synoptic-scale forcing. The afternoon convective storms are classified into 3 types as storm from other places , storm anchoring and storm moving by historical storm position . The corresponding storm structure is introduced to make the statistic of storm structure characters. The results show: the afternoon convective storm affected shanghai in warm season mainly occurs in the region from urban to the Yangtze estuary, which is mainly due to the urban heat island effect and sea breeze. And the classified storms show difference in centroid height and vertical integral liquid of storm .
文章编号:201909150337     中图分类号:    文献标志码:
基金项目:国家自然科学基金重点项目,国家自然科学基金项目(面上项目,重点项目,重大项目)
引用文本:
管理,0.[en_title][J].Meteor Mon,():-.
Guan Li,0.Radar Climatology Analysis of Warm Season Afternoon Convective Storm over Shanghai[J].Meteor Mon,():-.