Collaborative Research: CEDAR--Experimental and Modeling Study of Mesoscale Ion-Neutral Coupling in the Auroral Thermosphere

用三台法布里-珀罗涉仪和阿米西里非相干散射雷达研究了极光热层中离子和中性粒子在活动和平静极光条件下的耦合。热层中性风的三个分量(纬向、经向和垂直)被隔离在一个大约50公里-75公里大小的中尺度单体中，在阿米西里覆盖模式内。其目标是量化极光热层中焦耳加热的中尺度响应，并评估极光弧区附近的离子-中性耦合。这些测量还提供了中性风的散度和涡度。应用基于物理的全球电离层-热层模式(GTIM)，提高了空间分辨率和测量约束，以评估各种强迫函数的重要性，包括洛伦兹阻力、粒子降水能量沉积和焦耳加热。

The coupling of ions and neutrals in the auroral thermosphere, during both active and quite auroral conditions is studied using three Fabry-Perot interferometers and the AMISR incoherent scatter radar. Three components (zonal, meridional, and vertical) of the thermospheric neutral wind are isolated in a mesoscale cell approximately 50km - 75km in size, within the AMISR coverage pattern. The goal is to quantify the mesoscale response to joule heating in the auroral thermosphere, and to evaluate ion-neutral coupling in the vicinity of auroral arcs. The measurements also provide the divergence and vorticity of the neutral wind. The physics-based Global Ionosphere-Thermosphere Model (GTIM) is applied with enhanced spatial resolution and measurement constraint to evaluate the importance of various forcing functions, including Lorentz drag, particle precipitation energy deposition, and Joule heating.