ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 50 Issue 12 > 2024,50(12):1551-1560. DOI:10.7519/j.issn.1000-0526.2024.110801 Prev Next
Analysis of the September 2024 Atmospheric Circulation and Weather
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Abstract:
In September 2024, the western Pacific subtropical high was significantly more westward and stronger than usual, controlling most regions of southern of China. The persistent high temperature and less rainfall in Sichuan, Chongqing and the middle reaches of the Yangtze River regions led to the continuous worsening of meteorological drought. In northern of China, zonal westerly circulation played the main theme, so there was not much active cold air. In September, the national mean temperature was 18.5℃, 1.6℃ higher than that of the same period of normal years, with high temperature weather mainly experienced in the area south of Yangtze River, the South China and the eastern part of Southwest China. The national average precipitation was 78.7 mm, 20.5% more 〖JP2〗than the normal value. 〖JP〗The autumn rain of West China began on 29 September, which was 27 days 〖JP2〗later than the usual onset date (2 September) and recorded〖JP〗 the latest since 1961. Areas with excessive rainfall were mainly impacted by typhoons. There were eight typhoons generated in the Northwest Pacific and the South China Sea, three typhoons more than the five in the same period of normal years. Among them, three typhoons made landfall, 1.3 more than normal (1.7). The Super Typhoon Yagi was the strongest typhoon making landfall in China in autumn since 1949. Under Yagi’s influence, severe torrential rain occurred in Hainan, Guangxi and other regions. On 16 and 19 September, the two typhoons Bebinca and Pulasan landed in Shanghai consecutively, and the time interval between them was the shortest in Shanghai as recorded. As a result, parts of East China received heavy rain or torrential rain, and some localized regions even experienced torrential rain or severe torrential rain.
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