Analysis of the February 2016 Atmospheric Circulation and Weather
The main characteristics of the general atmospheric circulation in February 2016 are as follows: There are two polar vortex centers in the Northern Hemisphere. The circulation presents meridional patterns in middlehigh latitudes. The south branch trough behaves actively， and the mean position is located at 90°E nearby. The subtropical high is a little weaker than normal years, and the average south branch trough is also weaker than normal years. The monthly mean precipitation is 12.3 mm, and 29.4% less than normal （17.4 mm）. The monthly mean temperature is -1.6℃, and 0.1℃ higher than normal （-1.7℃）. There is one cold wave process nationwide. Meanwhile, sanddust weather first appeared in Northwest China this year.