Collaborative Research: Observations and Modeling of Acoustic Waves in the Ionosphere and Lower Thermosphere

该项目将进行建模和数据分析工作，以评估声波和高频重力波对高层大气的热、化学和动力状态的影响程度。具体而言，该项目将：(1)在北美两个地点使用数字高频多普勒测深仪（TIDDBIT）观测电离层扰动；(2)利用数值波传播模式推断引起观测到的电离层变化的潜在大气扰动，并表征进入电离层的能量和动量通量；(3)利用群速度和射线追踪模型来检测声源。

This project will conduct a modeling and data analysis effort to assess the extent to which acoustic waves and high frequency gravity waves influence the thermal, chemical, and dynamical states of the upper atmosphere. Specifically, the project will: (1) observe ionospheric perturbations using digital high-frequency Doppler sounders (TIDDBIT) from two North American locations; (2) use a numerical wave propagation model to infer the underlying atmospheric perturbations that cause the observed ionospheric variations and to characterize the energy and momentum flux into the ionosphere; and (3) use group velocity and raytracing models to examine sources of acoustic waves.