2020年6月大气环流和天气分析

Analysis of the June 2020 Atmospheric Circulation and Weather

2020年6月环流特征表现为:极涡偏强,呈单极型分布,偏向东半球一侧;中高纬环流呈多波型,冷空气活动频繁;西太平洋副热带高压强度较常年偏强,面积偏大。主要天气气候特点是全国平均气温为20.7℃,较常年同期(20.0℃)偏高0.7℃,全国平均降水量为112.7 mm,较常年同期偏多13.5%,江淮梅雨于6月上旬先后爆发,入梅偏早、强度偏强。月内我国共出现5次区域性暴雨天气过程,部分地区暴雨洪涝严重。华北北部、华南南部及新疆北部、云南等地的部分地区气象干旱持续发展。月内生成和登陆台风接近常年,今年第二号台风鹦鹉(Nuri)于6月14日在广东省阳江市海陵岛登陆。

The main characteristics of the general atmospheric circulation in June 2020 are as follows.There was one polar vortex center in the Eastern Hemisphere,stronger than usual.The circulation in Eurasian middle-high latitudes showed a multiwave pattern.The strength of Western Pacific subtropical high was stronger and the covered area was larger than in normal years.The monthly mean temperature was 20.7℃,0.7℃higher than normal.The monthly mean precipitation amount was 112.7 mm,which is 13.5%more than normal.Five regional heavy rainfall processes occurred in China this month and some places were hit by severe rainstorm and floods.Droughts were found in nothern part of North China,southern part of South China,northern Xinjiang and Yunnan etc.in June.Typhoon Nuri landed in Yangjiang,Guangdong Province,which is the second landing typhoon in China this year.