ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 49 Issue 10 > 2023,49(10):1277-1284. DOI:10.7519/j.issn.1000-0526.2023.091301 Prev Next
Analysis of the July 2023 Atmospheric Circulation and Weather
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
The main characteristics of the atmospheric circulation in July 2023 are shown as follows. The polar vortex split into multiple centers distributed around the pole in the Northern Hemisphere, stronger than normal. Compared to the normal, the western Pacific subtropical high was stronger with the position further westward and northward. The monthly mean precipitation across China in July was 122.0 mm, close to the normal. There were 45 stations where the daily precipitation broke the historical records. The positive anomaly of precipitation was significantly 1 to 2 times more than that in western part of Jilin and southern part of Hebei in the same period of a year. However, the negative anomaly of rainfall was 50% less in the northern and central parts of Northwest China, the northern and central parts of Guangxi, the central part of Hunan and the northern part of Xinjiang. There were eight regional rainstorm processes in this month. Influenced by Typhoon Doksuri and the residual circulations, extremely severe rainfall occurred in Taiwan, eastern Zhejiang, eastern Fujian and the BeijingTianjinHebei Region from 26 to 29 July and from 29 July to August 1 in order. Three tropical cyclones were generated in the South China Sea and the western North Pacific, two of which made landfall in China. Generally, the number of landfall typhoons in the July China was less than in the previous years. Typhoon Doksuri was the second strongest typhoon that landed in Fujian. The monthly mean temperature in China was 23.0℃, which was slightly higher than the usual. The mean maximum temperature in western Shandong, southern Hebei, and northwestern and northeastern Xinjiang was 2-4℃ higher than normal. Totally, there were seven high temperature processes in this month. A largescale persistent high temperature weather heated China form 5 to 16 July. The maximum temperature exceeded 35℃ in the most of the central and eastern China, western Inner Mongolia and Xinjiang, and the daily maximum temperature at 12 national stations surpassed the historical extremes.
Keywords:
Project Supported:
Clc Number:
Mobile website
