Dynamic Seasonal Transition from Winter to Summer in the Northern Hemisphere Stratosphere
ZHANG Yu-Li1,2, LIU Yi2, LIU Chuan-Xi2
Figure 1 a The evolution of zonal-mean zonal wind contour at 70 hPa units: m s -1 , 1989-1990. The period between the two blue red lines is a month 31 days with the strongest westerly easterly wind. b The evolution of similarity between daily zonal wind and winter zonal wind field R w at 70 hPa and 51#cod#x000b0;N in 1990.