High-Latitude Antarctic Neutral Mesospheric and Thermospheric Dynamics and Thermodynamics

高纬度南极中性层和热层动力学和热力学

• 批准号: 9615157
• 负责人: Gonzalo Hernandez
• 金额: $ 28.7万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9615157&HistoricalAwards=false
• 关键词: Latitude; Antarctic; Neutral; Mesospheric; Thermospheric

Abstract 9615157 Hernandez It is possible to deduce the temperature and windspeed of the atmosphere by measuring the emission spectra of certain trace gasses, especially of those which are confined to fairly narrow altitude regions. This project uses a Fabry-Perot infrared interferometer located at South Pole, Antarctica, to look at the band spectra of several trace species, most importantly the hydroxyl radical (OH), in orthogonal directions. By determining the Doppler shift of the lines the winds can be measured, while the brightness and line ratios within the bands provide density and temperature information. The OH is the atmosphere is primarily found in a narrow band near 90 km altitude. The fact that the measurements are being made at the axis of rotation of Earth significantly limit the types of planetary waves, thus simplifying the study of the large scale dynamics of the atmosphere. ***

通过测量某些痕量气体的发射光谱，特别是那些局限于相当狭窄的高度区域的气体的发射光谱，可以推断出大气的温度和风速。本项目使用位于南极洲南极的法布里-珀罗红外干涉仪，在正交方向上观察几种痕量物质的波段光谱，其中最重要的是羟基自由基（OH）。通过确定谱线的多普勒频移，可以测量风，而谱线内的亮度和谱线比提供密度和温度信息。OH是大气中主要存在于90千米高度附近的窄带中。测量是在地球自转轴上进行的，这一事实大大限制了行星波的种类，从而简化了对大气大尺度动力学的研究。* * *