气象2024，Vol.50Issue(8)：1024-1032,9.DOI:10.7519/j.issn.1000-0526.2024.070801
2024年5月大气环流和天气分析
Analysis of the May 2024 Atmospheric Circulation and Weather
摘要
Abstract
The main characteristics of the general circulation in May 2024 are that the polar vortex in the Northern Hemisphere was partially mono-polar with stronger intensity than usual.The 500 hPa geopoten-tial height presented the distribution of a four-wave pattern in middle-high latitudes of the Northern Hemi-sphere,which means that the circulation had transformed from a three-wave pattern in winter into a four-wave pattern in summer,and the meridional degree of the Eurasian circulation was relatively high.The western Pacific subtropical high was stronger and located more westerly and northerly than that in normal years,while the south branch trough was weaker than usual.The monthly mean temperature across China in May was 17.7℃,1.2℃ warmer than normal.The monthly mean precipitation was 69.5 mm,which is 1％less than normal.During this month,five regional torrential rain processes occurred in China,but the South China Sea summer monsoon erupted in the sixth pentad(May 26),2 pentads later than the normal onset time in the fourth pentad in May.In addition,three severe convection weather events occurred this month,making the hit areas suffer from gales and hailstorm.Moreover,the northern part of China was troubled by two sand-dust events in this month.关键词
大气环流/暴雨/沙尘/强对流Key words
atmospheric circulation/torrential rain/sand-dust/severe convection分类
大气科学引用本文复制引用
郭楠楠,林建..2024年5月大气环流和天气分析[J].气象,2024,50(8):1024-1032,9.基金项目
国家重点研发计划(2021YFC3000901)和中国气象局水文气象重点开放实验室开放研究课题面上项目(23SWQXM031)共同资助 （2021YFC3000901）
