CEDAR Postdoc: Antarctic Mesospheric Gravity Waves Utilizing a High Altitude Numerical Weather Prediction System

该项目将调查极地高纬度短周期重力波的来源以及影响其传播的大气条件。这项调查将利用南极半岛罗瑟拉共设的全天成像仪和流星雷达获取的重力波和中层风速的测量结果。观测到的波浪数据将与海军作战全球大气预报系统高级高海拔(NOGAPS-Alpha)高层大气预报和数据同化模式以及用于波源区定位的傅里叶射线跟踪模式一起进行分析。这项分析将确定高纬度的主要波源，包括评估地形波的重要性，以及描述影响波导入和传播的大气条件。

This project will investigate sources of short-period gravity waves at high polar latitudes as well as the atmospheric conditions which influence their propagation. This investigation will utilize measurements of gravity waves and mesospheric wind speeds acquired by an all-sky imager and meteor radar co-located at Rothera on the Antarctic Peninsula. The observed wave data will be analyzed in conjunction with the Navy Operational Global Atmospheric Prediction System Advanced High Altitude (NOGAPS-ALPHA) forecasting and data assimilative model of the upper atmosphere, along with a Fourier ray tracing model for localization of wave source regions. This analysis will result in an identification of dominant wave sources at high latitudes, including an assessment of the importance of orographic waves, as well as a characterization of atmospheric conditions which affect wave ducting and propagation.