Ray Methods for Atmospheric Gravity Waves

在80公里-100公里范围内，重力波源来自对流层和平流层，通过射线追踪技术可以实现预测公共源的能力。光线追踪方法在这里通过三倍的研究工作得到了加强，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。这项研究的第二项任务是协调欧拉(地面)和拉格朗日(与波)参考系中的经典色散公式，到目前为止，这两种参考系似乎产生了不同的光线跟踪结果。最后，这项工作扩展了常见的光线追踪方法，将波通过真实的三维大气传播，而不是迄今使用的稳态近似方法。

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.