ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 47 Issue 5 > 2021,47(5):638-644. DOI:10.7519/j.issn.1000-0526.2021.05.012 Prev Next
Analysis of the February 2021 Atmospheric Circulation and Weather
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Abstract:
The main characteristics of the general atmospheric circulation in February 2021 are as follows. There were two polar vortex centers in the Northern Hemisphere and they were weaker than normal. The general atmospheric circulation over mid-high latitudes of the Northern Hemisphere showed a four-wave pattern, and the circulation was of zonal type. The western Pacific subtropical high was stronger than normal but its impact range was small. Cold air processes in this month were weak with small influence scope in China. The monthly mean temperature was 1.2℃, higher than normal by 2.9℃, which is the highest in the same period since 1961. An extreme high temperature event occurred because the daily maximum temperatures at 618 national meteorological stations nationwide exceeded the historical extreme values in the same period in records. In February, the monthly mean precipitation was 19.6 mm, 9.5% higher than normal. In addition, in the middle of February, sustained heavy fog weather appeared in the central and eastern part of China, and a sand-dust event occurred across North China at the end of February.
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