Thermospheric Dynamics Associated with Substorm Surges and the Diffuse Aurora

计划进行的研究的目的是模拟磁层亚暴引起的热层现象。 特别是，最近观察到的现象内的恢复阶段后午夜漫射极光尚未得到解释，将进行调查，以及响应膨胀阶段浪涌，以前没有被评估。 由于亚暴期间高纬度地区发生的过程可能对全球产生影响，因此这些知之甚少的现象对整个热层都很重要。 拟议的研究将利用加州大学洛杉矶分校最近开发的三维时间相关的有限区域高分辨率模型。 将使用比过去高得多的分辨率来模拟极光区的切变和不稳定性，这将使它们能够首次成功地模拟出来。 UCLA模型是非流体静力学的、时间依赖的和成分依赖的。 CTIM模型将用于提供大尺度风、温度和潮汐结构，作为UCLA模型的输入。

The aims of the planned research are to simulate thermospheric phenomena which occur in response to magnetospheric substorms. In particular, recently observed phenomena within the recovery phase post-midnight diffuse aurora which have not yet been explained will be investigated, as well as the response to expansion phase surges which has not previously been evaluated. Since the processes that occur at high latitudes during substorms may have effects globally, these poorly understood phenomena are important for the thermosphere as a whole. The proposed research will make use of a 3-dimen-sional time-dependent limited area high resolution model, recently developed at UCLA. A much higher resolution will be used than has been used in the past to model shears and instabilities in the auroral zone which should enable them to be simulated successfully for the first time. The UCLA model is non-hydrostatic, time dependent and composition dependent. The CTIM model will be used to provide large scale winds, temperatures and tidal structures as inputs to the UCLA model.