CEDAR: Identification of Planetary Waves and Migrating as well as Nonmigrating Tidal Oscillations at Latitudes Using a Longitudinal Chain of Airglow Optical Instruments

CEDAR：使用气辉光学仪器的纵向链识别行星波以及纬度上的迁移和非迁移潮汐振荡

• 批准号: 9714648
• 负责人: Gulamabas Sivjee
• 金额: $ 21万
• 依托单位: Embry-Riddle Aeronautical University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-01-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9714648&HistoricalAwards=false
• 关键词: CEDAR; Identification; Planetary; Waves; Migrating

Investigators observe effects wave-driven fluctuations on composition and thermodynamics of the polar middle atmosphere and the lower thermosphere, which may reflect effects of tidal, planetary or gravity waves. They differentiate gravity-wave driven disturbances from those due to tides and planetary waves by periodicity and persistence of observed wave-like modulations of upper atmospheric quantities. However, they are conducting coordinated measurements from four polar stations located at different longitudes, since they cannot differentiate migrating tides from non-migrating tides at a single polar station. In investigating MLT disturbances, they are coordinating these polar sites airglow observations and detailed model calculations of tidal and planetary wave effects on airglow brightness and temperature. Supplementary data is collected from radars and lidars, integrated with airglow measurements whenever the former two are available, providing the vertical structure of different wave modes. This research lays groundwork for future support of TIMED missions.

研究人员观察到波浪驱动的波动对极地中层大气和低层热层的组成和热力学的影响，这可能反映了潮汐波、行星波或重力波的影响。他们通过观测到的高层大气量的波状调制的周期性和持久性，将重力波驱动的扰动与潮汐和行星波引起的扰动区分开来。但是，他们正在从位于不同经度的四个极站进行协调测量，因为他们无法在一个极站区分迁移潮和非迁移潮。在研究MLT扰动时，他们正在协调这些极地地点的气辉观测和潮汐和行星波对气辉亮度和温度影响的详细模型计算。从雷达和激光雷达收集补充数据，并在前两者可用时与气辉测量相结合，提供不同波模式的垂直结构。这项研究为未来支持TIMED任务奠定了基础。