ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 49 Issue 11 > 2023,49(11):1414-1420. DOI:10.7519/j.issn.1000-0526.2023.092701 Prev Next
Analysis of the August 2023 Atmospheric Circulation and Weather
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Abstract:
The main characteristics of the general atmospheric circulation in August 2023 are as follows. The intensity of the polar vortex was slightly stronger in the Northern Hemisphere. The circulation over the mid-to-high latitudes of Asia at 500 hPa showed “two troughs” and “one ridge”. The high-altitude trough affecting the northeastern and northern of China is stronger. The mean location of the ridge line in the western part of the Western Pacific subtropical high was more southward compared to that in normal years. In August, the monthly average temperature was 21.9℃, 0.8℃ higher than in the same period of normal years (21.1℃). The monthly average precipitation was 110.9 mm, which is 3.5% higher than normal (107.1 mm). During this month, the high temperature days were more than normal, with regional high temperature processes appearing successively in China. Meteorological drought continued to in the northwest and northeast of China. Six torrential rain events were reported in China. In August, six typhoons were active in the South China Sea and the Western North Pacific. The generation number of tropical cyclones was higher than that in the previous years, but the number of landfall typhoons was lower than usual. Severe convective weather was frequent and local disasters were severe. In addition, one tornado hit the Dafeng District, Yancheng of Jiangsu Province.
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