High-Latitude Antarctic Neutral Mesospheric and Thermospheric Dynamics and Thermodynamics

埃尔南德斯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。 该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带谱，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，而谱带内的亮度和谱线比率提供密度和温度信息。 OH是大气中主要发现在一个狭窄的带近90公里的高度。 在地球自转轴上进行测量的事实大大限制了行星波的类型，从而简化了对大气大尺度动力学的研究。 ***

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. ***