Studies of Gravity Waves in the Atmosphere

波浪在大气的各个层面传播，有点类似于海洋中的波浪，并通过它们所携带的能量和动量将高层和低层大气区域耦合起来。被称为行离子扰动的波起源于极光区，并在全球传播，而被称为次声波的波源相对较近，区域影响有限。大多数波浪产生于气象事件，传播数千公里，并以指数增长的速度上升到很高的高度。该项目的工作旨在发展对高层大气声重力波（AGW）的理论认识，并集中在五个特定领域：1)参与世界声重力波研究（WAGS）， 2)相干雷达对大气波和湍流的研究，3)大气声重力波在真实大气中的传播模式计算，4)大气中尺度扰动的非线性相互作用，5)基于混沌的大气中重力波连续体的模拟。

Waves propogate through all levels of the atmosphere, somewhat analagous to waves in the ocean, and serve to couple the upper and lower atmosphere regions by virtue of the energy and momentum that they carry. Waves known as traveling ionic disturbances originate in the auroral zones and travel globally, while waves known as infrasonde have relatively nearby sources and restricted regional effects. The majority of waves arise from meteorological events and propagate thousands of kilometers and ascend to great height with exponential growth. The work in this project is aimed at developing theoretical understanding of acoustic gravity waves (AGW) in the upper atmosphere with efforts concentrated in five particular areas: 1) participation in the World Acoustic Gravity Wave Study (WAGS), 2) studies of atmospheric waves and turbulence by coherent radars, 3) model computation of AGW propagation in a realistic atmosphere, 4) nonlinear interaction of mesoscale perturbations in the atmosphere, and 5) modeling of the middle atmosphere gravity wave continuum in terms of chaos.