Formation and Breakdown of High-Latitude Density Cells in Response to Ion Drag Forcing

时间-GCM模式被用于一系列步骤来研究在扰动的高纬度电离层-热层系统中产生四单元密度模式的机制。中心假设是，在强电动力强迫事件(风暴)期间，由流体的纯粹引起的静止的两单元模式的动态崩溃，产生了四单元模式。这项研究首先通过分离产生两个电池模式的物理机制以及它们在太阳周期中的变化来检验这一假设，然后检查四个电池发电与太阳和磁活动指数之间的相关性。细胞发育的形态也与伴随细胞结构的风和温度变化有关，并与潮汐和重力波的影响分开。

The TIME-GCM model is used in a series of steps to investigate the mechanism for creation of a four-cell density pattern in the disturbed high latitude ionosphere-thermosphere system. The central hypothesis is that dynamical breakdown of the quiescent two-cell pattern, caused by fluid sheer during strong electrodynamic forcing events (storms), produces the four-cell pattern. The research examines the hypothesis by first isolating the physical mechanisms generating the two-cell pattern and their variations of a solar cycle, then examines correlation between four-cell generation and solar and magnetic activity indices. The morphology of cell development is also indexed to wind and temperature variations accompanying the cell structures, and is separated from the effects of tides and gravity waves.