基于FY-4A资料的20210430强对流天气过程分析  

Analysis of Strong Convection Weather Process in 20210430 Based on FY-4A Data

作　　者：耿晓雯 汤洁[1] 安礼政 夏网萍[1] Geng Xiao-wen(Huai’an Meteorological Bureau of Jiangsu Province,Huai’an,Jiangsu 223001)

机构地区：[1]江苏省淮安市气象局,江苏淮安223001

出　　处：《农业灾害研究》2023年第4期111-113,共3页Journal of Agricultural Catastrophology

基　　金：淮安市气象局气象科研项目(202108)。

摘　　要：受东北冷涡影响,2021年4月30日傍晚起淮安市中北部地区出现最大直径为5 cm左右冰雹、12级雷雨大风等强对流天气。利用MICAPS观测资料、FY-4A卫星多通道扫描成像辐射计AGRI资料分析此次强对流天气的初生及发展过程,结果表明:(1)此次强对流天气过程整层天气系统呈现前倾结构和“上干下湿”的不稳定层结,利于强对流的触发;(2)淮安站上空云顶亮温下降—短暂上升—迅速下降的特征反映了淮安强对流天气是由不同对流云团造成的;(3)在较强对流天气发生前的0~1 h内,FY-4A AGRI卫星资料对云团的初生及发展有一定的短临预警指示作用。Affected by the northeast cold vortex,strong convective weather such as hail with the maximum diameter of about 5cm,thunderstorm and gale of magnitude 12 occurred in the central and northern part of Huai’an City from the evening of April 30,2021.The MICAPS observation data and the FY-4A satellite multi-channel scanning imaging radiometer AGRI data are used to analyze the birth and development process of this strong convective weather.The results show that:(1)The whole layer of the weather system of this strong convective weather process presents a forward tilt structure and an unstable stratification of“up dry and down wet”,which was conducive to the triggering of strong convection.(2)The characteristics of cloud-top brightness temperature over Huai’an Station,which was decreasing,rising briefly and falling rapidly,reflect that the strong convective weather in Huai’an was caused by different convective clouds.(3)Within 0~1 h before the occurrence of strong convective weather,the FY-4A AGRI satellite data had a certain short-term and imminent warning indication for the birth and development of cloud clusters.

关 键 词：风云四号A星 多通道扫描成像辐射计 对流初生 强对流天气 

分 类 号：P458[天文地球—大气科学及气象学]