陇东地区极端高温天气气候特征及影响系统分析  

Analysis on Climatic Characteristics and Influence Systems of Extreme High Temperature Weather in Eastern Gansu Province

作　　者：李祥科 张洪芬 刘翔 翟少婧 LI Xiangke;ZHANG Hongfen;LIU Xiang;ZHAI Shaojing(Qingyang Meteorological Bureau,Qingyang Gansu 745000)

机构地区：[1]庆阳市气象局,甘肃庆阳745000

出　　处：《现代农业科技》2024年第14期119-123,共5页Modern Agricultural Science and Technology

基　　金：庆阳市气象局局列项目(QY2022-6);甘肃省青年科技基金(23JRRM0750);甘肃省气象局科研项目(Ms2023-08)。

摘　　要：本文利用1991—2022年庆阳市极端高温天气(35℃以上)的地面、高低空观测资料以及实况观测资料,运用统计学方法和小波分析法,分析了陇东地区极端高温天气时空分布特征及影响系统。结果表明:庆阳市极端高温天气的出现受地形影响较大,其中山川沟壑区出现较多,塬区出现较少;在时间分布上,一天中大部分极端高温出现在14:00—15:00和15:00—16:00,一年中6月、7月极端高温天气较多,年际变化以10年为周期;庆阳市极端高温天气的影响系统主要为高原暖区、青藏高压、副热带高压等,可分为青藏高压控制型、副高环流型以及其他型。Based on the surface,high and low levels observation data and actual observation data of the extreme high temperature weather(above 35℃)in Qingyang City from 1991 to 2022,the spatial and temporal distribution characteristics and influence system of the extreme high temperature weather in eastern Gansu Province were analyzed by using statistical method and wavelet analysis method.The results showed that the appearance of extreme high temperature weather in Qingyang City was greatly influenced by topography,among which there were more in mountains and gullies and less in tablelands.In terms of time distribution,most of the extreme high temperature occured from 14:00 to 15:00 and 15:00 to 16:00 in a day,and more extreme high temperature weather occured in June and July in a year,and the interannual variation took 10 years as the cycle.The main influence systems of the extreme high temperature weather included plateau warm zone,Qinghai-Tibet high and subtropical high,etc.,and the extreme high temperature weather could be divided into Tibetan high control type,subtropical high circulation type and other types.

关 键 词：极端高温天气 气候特征 时空分布 影响系统 

分 类 号：P423[天文地球—大气科学及气象学]