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

该项目将研究高纬度地区短周期重力波的来源以及影响其传播的大气条件。这项调查将利用位于南极半岛Rothera的全天成像仪和流星雷达所获得的重力波和中间层风速测量数据。观测到的波浪数据将与海军作战全球大气预测系统高级高空（NOGAPS-ALPHA）预测和高层大气数据同化模型，以及用于波源区域定位的傅立叶射线追踪模型一起进行分析。这一分析将导致确定高纬度地区的主要波源，包括对地形波重要性的评估，以及对影响波的传导和传播的大气条件的描述。

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.