ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 45 Issue 10 > 2019,45(10):1494-1500. DOI:10.7519/j.issn.1000-0526.2019.10.016 Prev Next
Analysis of the July 2019 Atmospheric Circulation and Weather
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Abstract:
The main characteristics of the general atmospheric circulation in July 2019 are shown as follows. There were two polar vortex centers with stronger strength than normal in the Northern Hemisphere. As the 500 hPa geopotential height showed, the cold vortex over Europe was stronger than normal. The western Pacific subtropical high was by south during the first and middle dekads and moved northward during the last dekad of this month. In July, the monthly mean precipitation of China was 126.3 mm, more than the normal by 4.7%. The positive anomaly of precipitation was more than 100% in most regions of Jiangnan and the Southwest China while the negative anomaly of rainfall reached more than 50% in Huanghuai and Jianghuai regions. The monthly mean temperature of China was 22.1℃, which is a little higher than the usual. The mean high temperature days in July were 5.7 d, which is more than the usual (4.3 d). The high temperature days were significantly more than the normal in the south of North China, Huanghuai, Jianghuai and the south of Xinjiang. There were 61 stations where extreme high temperature events occurred and these stations are mostly located in the provinces of Shanxi, Liaoning, Xinjiang and Guangdong. There were seven regional torrential rain processes, most in South China and many stations measured extreme daily precipitation. Four typhoons were generated and only one landed China in July, less than normal.
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