Nonmigrating tidal coupling from the MLT region into the ionosphere and upper thermosphere

在这个项目中，我们打算找出耦合机制，映射到电离层和上热层，这些潮汐的存在被确定在许多数量的中层/低热层（MLT）区域观察到的非迁移潮汐信号。接下来的一个步骤是识别它们背后的耦合过程。为此，我们利用CHAMP测量，一方面，在纬向风，赤道电射流（EEJ）和电子密度中发现了突出的波-4结构。另一方面，热层潮汐风场的Hough模式扩展（HME）技术的基础上的TIMED测量和垂直等离子体漂移的中华卫星一号测量得出的可用于进行研究。使用时间-大气环流模式进行的建模研究将用于连接未取样区域，并测试耦合过程背后的物理学。此外，它们还将有助于解释观测到的潮汐信号的年度变化。

Within this project we intend to find out the coupling mechanisms that map the nonmigrating tidal signals observed in the mesosphere/lower thermosphere (MLT) region into the ionosphere and upper thermosphere, where the presence of these tides was identified in numerous quantities. A consequent next step is to identify the coupling processes behind them. For this we make use of CHAMP measurements, on the one hand, where the prominent wave-4 structure was revealed in the zonal wind, equatorial electrojet (EEJ) and electron density. On the other hand, tidal wind fields of the thermosphere derived from the Hough Mode Extention (HME) technique based on TIMED measurements and vertical plasma drifts derived from ROCSAT-1 measurements are available to conduct the research. Modeling studies performed with the TIME-GCM will be used to bridge the unsampled regions and to test the physics behind the coupling processes. They furthermore shall help explaining the observed annual variations of the tidal signals.