Study on the characteristics of atmospheric waves in near space during 2013 stratosphere sudden warming in Kunming, China

The wind data from December 1, 2012 to February 28, 2013, which is obtained by meteor radars from Kunming station and other 5 stations near the 120°E meridian chain, is used to analyze the influence of typical 2013 stratosphere sudden warming (SSW) event on the average wind field and atmospheric waves. The results show that during the SSW in 2013, the eastward wind of Kunming station weakened rapidly and turned, and the north wind was abnormally strong, and both the amplitude of the diurnal tide and the semidiurnal tide decreased significantly. Results combined with wavelet analysis reveals planetary waves increased clearly during SSW, but their dominating quasi-periods behave inconsistently at different latitudes and at different times. Meanwhile, the tidal wave structure is found in the f_oF₂ data at Kunming station, which implies that the complex interactions between planetary waves and tidal waves may be the main coupling mechanism. Certainly, more studies will be conducted in the next step to reveal the coupling mechanism.