中高层大气重力波对太阳活动周期响应特征研究

地球中间层和低热层（80-110km）区域是地球中性大气向空间等离子的过渡区，是中高层大气研究的热点区域。一方面，低层大气激发波动（主要是重力波）主要在该区域耗散，驱动中高层大气全球环流；另一方面，重力波传播又反过来受到背景大气环流以及波-波相互作用的影响。在中间层和低热层区域内，重力波对太阳活动周期的响应以及太阳活动周期对上述波-波或者波-流相互作用的调制，至今研究有限。本项目的目标是通过地基、空基的综合观测，给出中间层和低热层高度不同纬度、不同区域重力波对太阳活动周期的响应特征，并通过模式研究中间层和低热层区域太阳活动周期对波-波或者波-流相互作用的调制机理。

The mesosphere and lower thermosphere (MLT) of the Earth (80-110km) are the transition zone between the Earth's neutral atmosphere and the space plasma, and are the hotspots of the middle and upper atmosphere research. On the one hand, the atmospheric waves excited from the lower atmosphere, i.e., the gravity waves, mainly dissipate in this region, driving the global circulation of the middle and upper atmosphere. On the other hand, gravity wave propagation is also affected by background atmospheric circulation and wave interaction. However, only a few studies focused on the response of gravity waves to the solar cycle and the modulation of the wave-wave or wave - mean flow interaction by the solar cycle. Thus, the purpose of this project is to reveal the response of gravity wave to the solar cycle through comprehensive global observations, and try to find the modulation mechanism of the solar cycle on the wave-wave or wave - mean flow interaction with the help of numerical model.