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

合作研究：CEDAR——极光热层中尺度离子中性耦合的实验和模拟研究

• 批准号: 0640641
• 负责人: John Meriwether
• 金额: $ 33.91万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-15 至 2013-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0640641&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Experimental; Modeling

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.

使用三个法布里-珀罗干涉仪和 AMISR 非相干散射雷达研究了极光热层中离子和中性粒子在活跃和极光条件下的耦合。 热层中性风的三个分量（纬向、经向和垂直）被隔离在 AMISR 覆盖范围内大小约为 50 公里 - 75 公里的中尺度单元中。 目标是量化极光热层中焦耳热的中尺度响应，并评估极光弧附近的离子中性耦合。 测量结果还提供中性风的发散度和涡度。 基于物理的全球电离层-热层模型 (GTIM) 应用增强的空间分辨率和测量约束来评估各种强迫函数的重要性，包括洛伦兹阻力、粒子沉淀能量沉积和焦耳加热。