ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 44 Issue 10 > 2018,44(10):1370-1376. DOI:10.7519/j.issn.1000-0526.2018.10.014 Prev Next
Analysis of the July 2018 Atmospheric Circulation and Weather
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Abstract:
The main characteristics of the general atmospheric circulation in July 2018 are as follows. There was one polar vortex center in the Northern Hemisphere, which was stronger than usual. The 500 hPa geopotential height presented the distribution of a 4wave pattern in the midhigh latitude of the Northern Hemisphere. The strength of western Pacific subtropical high was much stronger and its location was by north compared to normal years. The monthly mean temperature was 22.9℃, 1.1℃ higher than normal, which ranks the third highest since 1961. The monthly mean precipitation amount over the whole country was 133.8 mm, which is more than normal (120.6 mm) by 11%. For the distribution of precipitation, northern China received more rain than usual, but the south had less. Seven rainfall processes with some extreme records occurred in China this month. Five tropical cyclones were active over the Northwest Pacific and the South China Sea, and three of them landed. The total and landing numbers of tropical cyclones were more than usual. The longlasting high temperature events happened in central and eastern China. Meanwhile, severe convective events occurred frequently, influencing a wide range of areas.
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