ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 46 Issue 3 > 2020,46(3):441-448. DOI:10.7519/j.issn.1000-0526.2020.03.015 Prev Next
Analysis of the December 2019 Atmospheric Circulation and Weather
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Abstract:
The main characteristics of the general atmospheric circulation in December 2019 are as follows. There were two polar vortex centers in the Northern Hemisphere. The circulation presented a threewave pattern in middlehigh latitudes. The East Asian trough behaved weakly while the south branch trough was stronger. And the subtropical high was located more westward than that in the same period of normal years. Monthly mean precipitation over China was 11.2 mm, which is 6.7% higher than normal (10.5 mm). Monthly mean temperature over China was －2.7℃, which is 0.5℃ higher than normal (－3.2℃). Three relatively severe rainfall events and three cold air processes with moderate strength occurred in December. In addition, two largescale continuous foghaze weather appeared in the central and eastern part of China during 7-10 and 20-26 December.
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