摘要
基于NCEP/NCAR再分析资料和常规气象观测资料,采用气候统计方法,分析了2022年广东春运期间气候异常特征和成因进行综合分析。结果表明:2022年广东春运期间(1月17日至2月25日)表现出前期暖干、中后期异常冷湿、总体温低雨多的气候特征。春运前期,东亚西部地区“北高南低”,西伯利亚高压偏弱,冷空气路径偏西,强度偏弱,对应的冬季风也偏弱,偏南气流位置偏北,广东地区水汽辐合较弱,缺少冷空气的配合,温高雨少;春运中后期,东亚地区“北高南低”,西伯利亚高压异常偏强,冷空气偏强且活动频繁,同时来自孟加拉湾的西南水汽和来自南海水汽输送异常偏强,广东地区处于强水汽辐合区,冷暖气流交绥,降水异常偏多,湿冷明显。
Based on the reanalysis of NCEP/NCAR and conventional meteorological observations and with the method of climatological statistics,this work analyzes the anomalous climatological characteristics of the Spring Festival travel rush of Guangdong province in 2022 and studies the causation comprehensively.The results are shown as follows.During the travel rush(from January 17 to February 25),the climatologi⁃cal characteristics are marked by a warm and dry early stage,anomalously cold and wet mid-and late-stage,and an overall low temperature and abundant rainfall.In the early stage of the travel rush,geopoten⁃tial heights were higher in the north than in the south of the western part of East Asia,a high pressure was weak over Siberia and cold air traveled via a western route and was relatively weak.Correspondingly,winter monsoons were weak and southerly airflow was northward located,resulting in weak convergence of water va⁃por,little meeting with cold air,and high temperature and little rain over the area of Guangdong.In the middle and late stage of the travel rush,however,the same allocation of geopotential heights in East Asia was accompanied by an anomalously strong Siberian high and intense and frequent activity of cold air.Be⁃sides,water vapor from the Bay of Bengal to the southwest and the South China Sea to the south were anoma⁃lously strong and converged over the area of Guangdong to cause cold air currents to meet with warm ones,leading to anomalously more rain and colder temperature with higher humidity.
作者
汪明圣
胡婷
胡娅敏
WANG Ming-sheng;HU Ting;HU Ya-min(Climate Center of Guangdong Province,Guangzhou 510640;Meteorological Observatory of Guangzhou,Guangzhou 511430)
出处
《广东气象》
2023年第2期1-4,共4页
Guangdong Meteorology
基金
气象预报业务关键技术发展专项子项目(YBGJXM(2020)6A-04)
广东省气候中心业务科研项目(QH202001)。
关键词
气候学
气候异常
大气环流
春运
广东
climatology
climatological anomalies
general circulation
Spring Festival travel rush
Guangdong
