我国中低纬地区上空低电离层中的行星波

本文通过5年的电离层吸收观测资料与平流层增温事件对比及吸收资料的谱分析,得出以下几点初步结论:1)极区平流层增温事件的影响可能通过子午环流和行星波传播,经过5—9天后到达中低纬地区,从而引起那里的电离层吸收变化;2)冬季行星波沿子午方向的平均速度大约在10m/s到15m/s之间变化;3)全年均有周期为32天、18天、10天、8天和2天的行星波出现,它对大气湍流系数有明显影响。计算得出行星波扰动引起中层的NO浓度偏离未扰值可高达40%。 

Planetary Waves in the Lower Ionosphere Over the Mid-and Low Latitude Regions in China

In this paper,spectra of observed ionospheric absorption data of radio waves for five years were analysed and its comparison with events of stratospheric warmings was made.Some preliminary conclusions of the results are: (1) the effects of stratospheric warming in polar regions on the mid-and low latitudes absorption through planetary wave propagation take 5 to 9 days;(2) in winter,the meridional velocity of planetary wave is between 10 m/s and 15m/s;(3) planetary waves at periods of 32,18,10,8 and 2 days appear for any seasons of the year.They affect the coefficient of atmospheric turbulences.A calculation showed that the deviation of NO density in the mesosphere from its original value by planetary disturbances can be up to 40%.