CEDAR: Arctic Observations of the Upper Mesosphere and Thermosphere

这个项目包括两个实验。第一项研究将研究e区中性成分在响应极光加热时的时间发展。PI将在两个地点进行定量测量：第一个地点位于Sondre Stromfjord的极地帽，将代表与向南的IMF相关的午夜至黎明部分反太阳中性流的上游地点；第二个位于第一个的赤道方向，代表下游地点。该实验同时测量了e区成分变化和极光诱导的焦耳和粒子加热输入的空间特征。对两者的观察将有助于研究控制原子氧消耗的局部过程与传输过程的作用。第二个实验将确定大气重力波是否会导致夜光云粒子升华。该研究将使用来自瑞利激光雷达和迈克尔逊干涉仪的数据，该干涉仪目前位于Sondre Stromfjord，以及新开发的紫外光谱仪。PI将测量太阳最大低气压角在地平线以下6至8度之间时NLC云粒子和AGWs的特征。

This project consists of two experiments. The first will investigate temporal development in the neutral composition in the E-region in response to auroral heating. The PI will make quantitative measurements at two sites: the first, located in the polar cap at Sondre Stromfjord, will represent an upstream site in the antisunward neutral flow in the midnight to dawn sector associated with southward IMF; the second, located equatorward of the first, represents the downstream site. This experiment simultaneously measures spatial characteristics of compositional changes and aurorally-induced Joule and particle heating inputs into the E-region. Observations of both will allow the investigation of the role of local versus transport processes which govern depletions of atomic oxygen. The second experiment will determine if atmospheric gravity waves cause noctilucent cloud particles to sublimate. The study will use data from a Rayleigh lidar and a Michelson interferometer, currently located at Sondre Stromfjord and from a newly developed UV spectrograph. The PI will measure characteristics of NLC cloud particles and AGWs during a maximum solar depression angle between 6 and 8 degrees below the horizon.