Energy Flux and Wavelet Diagnostics of Secondary Mountain Waves
Energy Flux and Wavelet Diagnostics of Secondary Mountain Waves
复制标题
次生山波的能量通量和小波诊断
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Ronald B. Smith
中科院分区：
文献类型：
--
作者：
B. Woods;Ronald B. Smith
摘要近年来，利用速度、温度功率谱和动量通量估计对飞机山波资料进行了初步分析。本文认为，能量流子波(即压力-速度子波互谱)为不同类型的山体波的定位和分类提供了更有力的工具。在本文的第一部分中，使用各种线性山波解的压力-速度互谱被证明能够解开不同传播方向和波长的配置波。也可以确定群速度矢量场。第二部分，将能量流小波技术应用于2006年地形诱导旋翼实验(T-REX)产生的五个进入平流层的山波个例。利用GPS高度对飞机静压进行静力校正，确定了沿航迹的摄动压力。在其中4种情况下，长上传和短下支撑并置。
Abstract In recent years, aircraft data from mountain waves have been primarily analyzed using velocity and temperature power spectrum and momentum flux estimation. Herein it is argued that energy flux wavelets (i.e., pressure–velocity wavelet cross-spectra) provide a more powerful tool for locating and classifying different types of mountain waves. In the first part of the paper, pressure–velocity cross-spectra using various linear mountain-wave solutions are shown to be capable of disentangling collocated waves with different propagation directions and wavelength. A field of group velocity vectors can also be determined. In the second part, the energy flux wavelet technique is applied to five cases of mountain waves entering the stratosphere from the Terrain-Induced Rotor Experiment (T-REX) in 2006. Perturbation pressure along the flight track is determined using aircraft static pressure corrected hydrostatically with GPS altitude. In four of the cases, collocated long up-propagating and short down-prop...