ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 46 Issue 11 > 2020,46(11):1520-1528. DOI:10.7519/j.issn.1000-0526.2020.11.012 Prev Next
Analysis of the August 2020 Atmospheric Circulation and Weather
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Abstract:
The main characteristics of the general atmospheric circulation in August 2020 are as follows. There were two polar vortex centers in the Northern Hemisphere and they were a little weaker than normal. The circulation at middlehigh latitudes of the Eurasian showed straight, and the general circulation was of latitudinal type with small longitude. The Western Pacific subtropical high was stronger than that of the climatological normal, and the location was west compared to normal years. The monthly mean temperature was 21.6℃, 〖JP2〗higher than normal (20.8℃) by 0.8℃. The monthly mean precipitation was 134.5 mm, 〖JP〗28% higher than normal (105.2 mm). During this month, 9 torrential rain processes with some extreme records occurred in China, causing flood disasters across the regions of southwest, northwest, Huanghuai and some other places. There were 7 tropical cyclones active over South China Sea and Western North Pacific, among which typhoon Hagupit (2004), Mekkhala (2006) and Higos (2007) made landfall in China. The total and landing numbers of typhoon were more than normal. Longlasting high temperature events happened in Jiangnan, Jianghan and Jianghuai regions with the duration reaching or exceeding historical extreme records in some regions.
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