CEDAR: A Study of the Response of the Low Latitude Thermosphere and Ionosphere to Geomagnetic Storms

研究人员将使用一个耦合的热层-电离层-等离子层模型来研究安静和磁干扰条件下的低纬度热层和电离层。目的是了解动力学，等离子体密度和电动力学之间的相互作用，以响应地磁风暴。静时低纬度热层和电离层表现出有趣的反馈相互作用，产生了赤道电离异常、反转前东向电场增强、磁赤道高速中性风、日落后异常中性峰以及与温度特征同时存在的大垂直风等特征。在地磁风暴期间，磁层的变化通过重新分配电离的电场影响大气。这反过来又改变了中性风和大气成分。研究人员将尝试使用一个复杂的模型来模拟这些影响，该模型将热层、电离层和等离子层结合在一起，他们将使用地面和空间测量来测试结果。

ATM9813747absThe investigators will use a coupled thermosphere-ionosphere-plasmasphere model to study the low latitude thermosphere and ionosphere under quiet and magnetically disturbed conditions. The purpose is to understand the interactions between dynamics, plasma density, and electrodynamics in response to geomagnetic storms. The quiet-time low latitude thermosphere and ionosphere exhibit interesting feedback interactions that give rise to features such as the equatorial ionization anomaly, the pre-reversal enhancement of the eastward electric field, high velocity neutral winds at the magnetic equator, neutral peaks in the post sunset anomaly, and large vertical winds co-located with the temperature features. During a geomagnetic storm, changes in the magnetosphere affect the atmosphere through electric fields that redistribute ionization. This in turn modifies neutral winds and atmospheric composition. The researchers will attempt to simulate these effects using a sophisticated model that couples the thermosphere, ionosphere, and plasmasphere, and they will test the results using ground- and space-based measurements.