CEDAR: Studies of Magnetosphere Ionosphere Thermosphere Coupling

这个CEDAR项目的目的是为了更好地理解磁层和电离层之间的耦合，并量化输入中性大气的能量。提出的策略包括两个部分：第一，根据行星际介质和磁活动的不同参数建立高纬度电离层对流的经验模型；第二，仔细检查与稳定风力条件相对应的事件。由于电离层条件变化很大，因此需要结合经验模拟和案例研究；电离层-磁层系统受多个过程控制，每个过程的响应时间具有不同的时间尺度。因此，即使考虑到与稳定条件相对应的事件，经验模型也可能无法准确描述在个别情况下获得的模式。我们方法的另一个方面是，在适当的时候，将电场、电流和极光特征映射到磁层赤道平面上。

The purpose of this CEDAR project is to better understand the coupling between the magnetosphere and ionosphere, and to quantify the resultant energy input into the neutral atmosphere. The proposed strategy has two components: first, to establish empirical models of convection in the high latitude ionosphere for various parameters of the interplanetary medium and magnetic activity; second, to examine carefully selected events that correspond to stable wind conditions. A combination of empirical modeling and case studies is needed because the ionospheric conditions are highly variable; the ionosphere-magnetosphere system is controlled by several processes, each with a response time characterized by different time scale. Therefore, the empirical models might not provide an accurate description of the pattern obtained for individual circumstances even when events corresponding to stable conditions are considered. Another aspect of our approach will be, when appropriate, to map electric fields, currents, and auroral features to the magnetospheric equatorial plane.