Ray Methods for Atmospheric Gravity Waves

在80公里至100公里的区域，重力波的来源来自对流层和平流层，并且可以通过射线追踪技术来确定共同来源。射线追踪方法在这里得到了三方面的研究努力，首先解决了应用于缓慢变化的重力波的传统限制。我们的方法包括处理由对流层对流产生的快速变化的波。研究的第二个任务是调和经典色散形式在欧拉（地面）和拉格朗日（与波）参考系中，迄今为止似乎产生不同的光线追踪结果。最后，这项工作扩展了常见的射线追踪方法，包括波在现实的三维大气中的传播，而不是迄今为止使用的稳态近似。

The source of gravity waves in the region 80km - 100 km is from the troposphere and stratosphere, and the ability to divine common sources can be achieved by ray-tracing techniques. Ray tracing methods are here enhanced by a three-fold research effort that first addresses the traditional limitation of application to slowly varying gravity waves. Our approach includes treatment of rapidly varying waves generated by tropospheric convection. The second task of the research is reconciliation of the classical dispersion formalism in both Eularian (ground-based) and Lagrangian (with the wave) reference frames, which to date appear to produce differing ray-trace results. Finally, this effort expands common ray trace methods to include wave propagation through a realistic, three-dimensional atmosphere rather than the steady-state approximations used to date.