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气象:2021,47(11):1426-1432
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2021年8月大气环流和天气分析
周冠博,高拴柱
(国家气象中心,北京 100081)
Analysis of the August 2021 Atmospheric Circulation and Weather
ZHOU Guanbo,GAO Shuanzhu
(National Meteorological Centre, Beijing 100081)
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投稿时间:2021-10-09    修订日期:2021-10-26
中文摘要: 2021年8月环流特征如下:北半球极涡呈单极型分布,强度偏强;亚洲大陆中高纬为“两槽一脊”型;西北太平洋副热带高压明显偏西。8月全国平均降水量为118.3 mm,较常年同期(105.2 mm)偏多12 %;全国平均气温为21.1℃,较常年同期(20.8℃)偏高0.3℃。月内共出现了10次区域性强降水过程,其中1次降水活动与台风有关。共有4个热带气旋(风力8级以上)在西北太平洋和南海海域活动,其中台风卢碧先后登陆我国广东和福建。月内,南方遭受暴雨洪涝灾害;西北东部等地气象干旱持续;华南西北部、江南西南部及四川东南部等地高温日数多;多地遭受强对流天气灾害,部分地区受灾较重。
Abstract:The main characteristics of the general atmospheric circulation in August 2021 are as follows. The polar vortex of Northern Hemisphere presented a single pattern. In the mid high latitudes of Asia, the circulation presented a two trough and one ridge pattern. The subtropical high lay westward obviously. Meanwhile, the monthly mean precipitation was 118.3 mm, which is more than its normal value (105.2 mm) by 12.0%. The monthly mean temperature was 21.1℃, 0.3℃ higher than its climatological mean (20.8℃). Ten regional torrential rainfall events happened in August, and one of them was caused by tropical cyclone. In August, four tropical cyclones were active over the northwestern Pacific Ocean and the South China Sea, and Typhoon Lupit (2109) made landfall in Fujian Province and Guangdong Province of China. During this month, southern China suffered from heavy rains and floods, and drought continued over eastern areas of Northwest China. In addition, persistent high temperature occurred in northwest of South China, southwest of Jiangnan and southeast of Sichuan Province. Many provinces experienced severe convections, and some areas suffered from serious disasters.
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周冠博,高拴柱,2021.2021年8月大气环流和天气分析[J].气象,47(11):1426-1432.
ZHOU Guanbo,GAO Shuanzhu,2021.Analysis of the August 2021 Atmospheric Circulation and Weather[J].Meteor Mon,47(11):1426-1432.