沙漠与绿洲气象2025，Vol.19Issue(2)：84-91,8.DOI:10.12057/j.issn.1002-0799.2310.20001
一次强冰雹天气环境场及卫星云参数特征分析
Analysis of the Environmental Field and Satellite Cloud Parameter Characteristics of a Severe Hailstorm
摘要
Abstract
Using hourly high-altitude and ground conventional observation data,as well as FY-4A satellite products,we analyzed the characteristics of the environmental field and cloud parameter evolution associated with a severe hailstorm in Yan'an.The results show that:(1)The strong convective process was characterized as a cold advection forcing type at high altitude,with the atmospheric stratification described as"dry and cold aloft,warm and humid below",and the ground convergence line triggered instability,leading to widespread thunderstorms.(2)The process was influenced by a highly organized medium-β scale convective system,and the steep drop in TBB values provided an early warning for hail occurrence more than 20 minutes in advance.Hailfall began when the TBB dropped below-32℃,and values below-70℃were likely indicative of a hailstorm.(3)The high value area of cloud top height gradient at the front of the mature thunderstorm cloud cluster and the high value area of pressure gradient on the upwind side of the 100 or 200 hPa cloud area correspond to the hail area.The cloud top height exceeding 10 km was an important condition for hailfall onset.(4)The main body of mature thunderstorm cloud was composed of ice clouds.On the upwind side,a transition zone of cirrus,mixed and supercooled water cloudswas observed,and multi-layered cloud structures on the downwind side.(5)The convective initiation product can identify the incipient location of thunderstorm clouds in advance to some extent and predict the enhancement process of these clouds.关键词
冰雹/FY-4A/云顶亮温/云顶高度/云顶气压/云类型/对流初生Key words
hail/FY-4A/TBB/CTH/CTP/CLT/CIX分类
大气科学引用本文复制引用
乔丹杨,王瑾婷,彭力,卢晔,刘帆,高萌,谢逸雯..一次强冰雹天气环境场及卫星云参数特征分析[J].沙漠与绿洲气象,2025,19(2):84-91,8.基金项目
陕西省自然科学基础研究计划青年课题(2023-JC-QN-0311) （2023-JC-QN-0311）
中国气象局2024年复盘总结专项(FPZJ2024-135) （FPZJ2024-135）
