CEDAR Post-doc: Mesospheric Acoustic Gravity Wave Imaging and Tomography at a Sub Auroral Site

ATM9813867该提案将支持波士顿大学空间物理中心的Steven Smith博士的博士后研究。 该研究将使用波士顿大学CEDAR光学断层成像设备（COTIF）来研究中间层和低热层（MALT）。 COTIF是一个位于新英格兰的四个站点网络，由位于Millstone Hill的一台全天空成像仪和三台成像摄谱仪（两台在缅因州，一台在罗得岛）组成，是全世界唯一能够进行地基大气发射层析成像的光学设施。 该项目将利用新的空间配置探测80至150公里范围内的结构。 这项研究将利用现有的和新的数据。 将特别着重研究声重力波的高度变化。 数据分析将产生两个高度重力波垂直动量通量的估计。 垂直通量的辐散通过中性风和波浪的相互作用，给出了平均风场的加速或减速。 重力波的长期季节和当地时间变化也将被研究

ATM9813867This proposal will support the post-doctoral research of Dr. Steven Smith at Boston University's Center for Space Physics. The research will use the Boston University CEDAR Optical Tomography Imaging Facility (COTIF) to study the mesosphere and lower thermosphere (MALT). COTIF is a four-site network in New England consisting of an all-sky imager at Millstone Hill and three imaging spectrographs (two in Maine and one in Rhode Island), the only optical facility worldwide capable of ground-based atmospheric emission tomography. This project will take advantage of a new spacing configuration for detecting structure in the 80 to 150 km domain. The study will make use of existing as well as new data. Specific emphasis will be placed on studying the altitude variations of acoustic gravity waves. The data analysis will yield estimates of the vertical momentum flux of gravity waves at two altitudes. The divergence of the vertical flux gives the acceleration or deceleration of the mean wind field by interactions between the neutral winds and waves. Long term seasonal and local time variations in gravity waves will also be investigated