ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Analysis of the January 2011 Atmospheric Circulation and Weather
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Abstract:
The following are the main characteristics of the atmospheric circulation in January 2011. The polar vortex was located to the North America in the Northern Hemisphere. The circulation presented a threewave pattern in middlehigh latitudes. The East Asia and the North America major troughs were weaker than the troughs in average conditions, and the European trough was stronger. The frontal zone in East Asia was further south than normal. The south branch trough was located at 90°E nearby and its intensity was equivalent to normal. The subtropical high in Northwest Pacific was equivalent weaker than normal obviously. The average temperature (-8.3 ℃) was 2.4 ℃ less than the normal years and the average precipitation (8.2 mm) was 3.9 mm less than the normal years. The drought conditions in North China and Huanghuai area, etc. have been more serious. The active cold air currents resulted in severe freezing rain and snow disasters. There were three cold air processes and six rainfall processes.
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