2019年11月大气环流和天气分析

Analysis of the November 2019 Atmospheric Circulation and Weather

2019年11月大气环流主要特征为:北半球极涡呈偶极型分布,环流呈四波型,东亚槽略偏弱。全国平均降水量13.6 mm,较常年同期偏少27.7%,出现一次较强降水过程。全国平均气温4.0℃,较常年同期偏高1.2℃,共出现5次冷空气过程,其中1次为寒潮。22—24日,华北中南部、黄淮西部、汾渭平原等地发生1次霾过程。

The main characteristics of the general atmospheric circulation in November 2019 are as follows.There were two polar vortex centers in the Northern Hemisphere.The circulation presented a four-wave pattern in middle-high latitudes.The East Asian trough was weak in this month.The monthly mean precipitation over China was 13.6 mm,which is 27.7%lower than normal.During this month,one rainfall process was seen.The monthly mean temperature was 4.0℃,which is 1.2℃higher than normal.There were five cold air processes in this month,one of which was cold wave.One haze event was experienced in central and southern part of North China,west of Huanghuai Region,and Fenwei Plain during 22-24 November 2019.