Ground Based Optical Remote Sensing of Cross-scale Coupling Processes Occurring in Earth's Auroral Thermosphere

地球极光热层中发生的跨尺度耦合过程的地基光学遥感

• 批准号: 1140075
• 负责人: Mark Conde
• 金额: $ 58.32万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-15 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1140075&HistoricalAwards=false
• 关键词: Ground; Based; Optical; Remote; Sensing

This project will use three imaging Doppler spectrometers to study wind and temperature in the Earth's thermosphere from about 120 to 240 km altitude over a grid spanning approximately 2000 x 1300 km in latitude and longitude respectively. Within the field of view some volumes will be observed tri-statically by all three instruments allowing for the first time unambiguous spatial mapping of the three vector components of the thermospheric wind field over an extended region. There will in addition be extended bi-static and mono-static coverage as well. This new Doppler imaging array will be applied to the following four science questions: 1) Do thermospheric wind and temperature fields contain local structure arising because the wind field can become dynamically unstable? 2) What is the spatial distribution of vertical wind disturbances in the auroral thermosphere? 3) How do thermospheric gravity waves perturb thermospheric winds and temperatures? 4) How do small-scale wind gradients affect dispersion of thermospheric air masses?

该项目将使用三台成像多普勒光谱仪，在纬度和经度分别跨越约2000 x 1300公里的网格上，研究海拔约120至240公里的地球热层中的风和温度。在视场内，所有三种仪器将对某些体积进行三静力观测，从而首次对一个扩展区域内的热层风场的三个矢量分量进行明确的空间映射。此外，还将扩展双静态和单静态的覆盖范围。这种新的多普勒成像阵列将应用于以下四个科学问题：1)由于风场可能变得动态不稳定，热层风和温度场是否包含局部结构？2)极光热层垂直风扰动的空间分布是怎样的？3)热层重力波如何干扰热层风和温度？4)小尺度风梯度如何影响热层气团弥散？