摘要
利用常规观测资料,对2022年7月6日河西走廊中部出现的一次区域性极端高温天气过程的环流背景、影响系统及天气成因进行分析。结果表明:(1)盛夏季节,100 hPa南亚高压的发展增强,为河西地区极端高温天气发生发展提供了有利的气候条件和大尺度环流条件;(2)南亚高压和大陆性高压是造成此次极端高温天气的2个主要影响系统,高原暖脊(暖中心)和地面热低压是2个相对浅薄的近地层影响系统;(3)南亚高压和大陆性高压相互叠加,由其引起的下沉增温和晴空辐射增温是造成此次极端高温天气的直接原因。
Using conventional observation data,the circulation background,influence system and weather cause of a regional extreme high temperature weather process in the middle of Hexi Corridor on July 6,2022 are analyzed.The results show that:(1)In midsummer,the development of 100 hPa South Asia High provides favorable climate background conditions and large-scale circulation background conditions for the occurrence and development of extreme high temperature weather in Hexi region.(2)The South Asia High and the Continental High are the two major impact systems that have caused this extreme high temperature weather.The Plateau Warm Ridge(warm center)and the ground thermal low are two relatively shallow near ground impact systems.(3)The South Asia High and the continental high superpose each other,and the subsidence and clear sky radiation caused by them are the direct causes of this extreme high temperature weather.
作者
安婷婷
崔宇
An Ting-ting(Zhangye Meteorological Bureau of Gansu Province,Zhangye,Gansu 734000)
出处
《农业灾害研究》
2023年第2期74-76,共3页
Journal of Agricultural Catastrophology
关键词
河西中部
极端高温
南亚高压
热低压
Central Hexi
Extreme high temperature
South Asia High
Thermal low pressure
