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.

在活性和极光条件下，使用三个Fabry-perot干涉仪和AMISR不一致的散射雷达研究了在激活和极光条件下，离子和中性的偶联。 热层中性风的三个组件（Zonal，子午线和垂直）在AMISR覆盖模式内分离出约50km至75公里的中尺度细胞中。 目的是量化极光热圈中对焦耳加热的中尺度响应，并评估极光弧附近的离子中性耦合。 测量还提供了中性风的差异和涡度。 基于物理学的全球电离层 - 热球模型（GTIM）具有增强的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Lorentz阻力，颗粒降水能量沉积和焦耳加热。