宁夏工程技术2023，Vol.22Issue(4)：302-311,10.
六盘山一次灾害性冰雹天气过程分析
Analysis of a Disastrous Hail Weather Process in the Liupan Mountains
摘要
Abstract
Using specialized observation equipment such as three-dimensional anemometers,laser ceilometers,Ka-band cloud radars,X-band dual-polarization radars,and micro rain radars,the hailstorm weather event that occurred in the Liupan Mountains on July 12,2021,was analyzed.Combined with the atmospheric circulation situation at the time and surface meteorological data,statistical methods were used to analyze the atmospheric circulation,dynamic field,and microphysical characteristics of the weather event,and differences in precipitation particles between the mountain summit and base were compared.The results show that the lifespan of individual hail cells during this event was close to 1 hour,with the precipitation echo lasting from formation to dissipation for about 2.5 hours.The hail event was accompanied by strong winds and a drop in temperature within 20 minutes of its occurrence,with the location on the eastern slope of the Liupan Mountains,and was mainly due to topographical effects.Fifteen minutes before the onset of hail,three cloud layers began to appear,with vigorous cloud development and a thick cloud layer(about 2 km),and the cloud base height changed rapidly during the hail event.Twenty minutes before the hail began,there was a sudden increase in radar echo within the cloud body.From the initial convection to the end of the hail,the echo lasted for an extended period,with the movement direction from northwest to southeast,and the maximum composite reflectivity reaching 52.5 dBZ.关键词
六盘山/冰雹/不稳定能量/上升运动/回波强度/微物理特征Key words
Liupan Mountains/hail/unstable energy/upward motion/echo intensity/microphysical characteristics分类
大气科学引用本文复制引用
林彤,邓佩云,周楠,李龙燕,宁欣婷,王雪妮..六盘山一次灾害性冰雹天气过程分析[J].宁夏工程技术,2023,22(4):302-311,10.基金项目
宁夏自然科学基金项目(2022AAC03684) （2022AAC03684）
中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室开放研究项目(CAMF-202306) （CAMF-202306）
中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室项目(CAMP-202106) （CAMP-202106）
