MAUI/MALT: Studies of High Frequency Atmospheric Gravity Waves in Mesospheric Airglows

研究人员将测量和研究毛伊岛的大气重力波结构和进入中间层的通量。OH气辉图像中观测到的结构将用于计算具有大垂直波长的重力波所携带的水平动量的垂直通量。该仪器由一个宽带单滤光片OH成像仪组成，具有较大的集光功率。气辉成像仪是唯一能够测量具有大相速的重力波的仪器，这种重力波携带了中间层中波动量通量的主要部分。气辉测量将与毛伊岛站点的激光雷达和流星雷达的风测量相结合。第二个目标是测量和研究这些短水平尺度波传播的垂直方向的符号。向上传播的动量可能被向下传播的波抵消。这些观测将为研究重力波的能量沉积及其对全球变化过程的影响提供有用的信息。

The investigators will measure and study the atmospheric gravity wave structure and flux into the mesosphere at Maui. The structure observed in OH airglow imagery will be used to calculate the vertical flux of horizontal momentum carried by gravity waves with large vertical wavelengths. The instrument to be used consists of a broadband, single filter, OH imager with the large light gathering power. Airglow imagers are uniquely capable of measuring gravity waves with large phase speeds that carry the major portion of the wave momentum flux in the mesosphere. The airglow measurements will be combined with wind measurements from a lidar and meteor radar collocated at the Maui site. A secondary objective is to make measurements of, and study the sign of, the vertical direction these short horizontal scale waves are propagating. Upward propagating momentum may be cancelled by downward propagating waves. These observations will contribute information useful for the study of energy deposition by gravity waves and their effects on global change processes.