Analysis of the June 2023 Atmospheric Circulation and Weather
The main characteristics of atmospheric circulation in the Northern Hemisphere exhibited a multipolar distribution of polar vortices in June 2023. The 500 hPa geopotential height field over the Ural Mountains was significantly weaker than the climatological average for the same period. The Western Pacific subtropical high was located more northward and westward than the normal situation. The average precipitation in June was 86.7 mm, which is 16% less than normal; and the least rainfall amount for the same period since 2005. The national average temperature was 21.1℃, showing a positive anomaly of 0.7℃, the second-highest since 1961. During this month, there were five regional torrential rain events mainly in Southwest China and the areas south of the Jianghuai Region. During this month, five large-scale high-temperature processes influence the western and northern parts of China. Moreover, seven severe convective weather events occurred in the provinces of Liaoning, Jilin, Jiangsu, Anhui, Guangdong and Guangxi. In terms of typhoon, there was only one generated in June, the least in June on record. What’s more, the decreased precipitation and higher temperature worsened the drought condition in the northern part of China.