Analysis of the April 2024 Atmospheric Circulation and Weather
The main characteristics of the general atmospheric circulation in April 2024 are as follows.There existed one polar vortex center stronger than usual in the Northern Hemisphere,located on the ocean surface southwest of New Siberian Islands.The circulation in middle-high latitudes showed a four-wave pattern,and there was a positive anomaly of the geopotential height over China.The strength of western Pacific subtropical high was stronger and more northward than that in normal years.The monthly mean temperature was 13.2℃,1.7℃ higher than the normal value 11.5℃.The monthly average rainfall reached 79.1 mm,65％more than in normal period(43.6 mm),both of the average temperature and rain-fall peaked the record in the same period since 1961.During this month,there was only one major cold air event,ten severe convection processes and seven large-scale regional rainfall processes affecting China,these events were mainly concentrated in southern China with higher frequency than normal.In addition,six sand-dust events influenced the northern part of China,and the drought in Southwest China was developing in stages.
万方数据
维普
