ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 49 Issue 5 > 2023,49(5):633-640. DOI:10.7519/j.issn.1000-0526.2023.042501 Prev Next
Analysis of the February 2023 Atmospheric Circulation and Weather
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Abstract:
The main characteristics of the general atmospheric circulation in February 2023 are as follows. Two polar vortex centers existed in the Northern Hemisphere, with the sub-center located along the Sea of Okhotsk and stronger than normal. The atmospheric circulation over mid-high latitudes of Eurasia changed from multi-wave type to “two-trough-and-one-ridge” type. Most of the mid-high latitude region of China was in the frontal zone ahead of ridge, with a positive anomaly before the trough range, so the associated cold air activities were more in number but weaker in intensity. The southern branch trough with regular position and intensity held a more frequency of rain and snow events in the northern China and phased continuously rainy weather in the southern China. The February average temperature over China was 0.3℃, 1.6℃ warmer than normal, and the monthly average precipitation was 15.5 mm, 5% less than normal.
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