A novel method for the extraction of local gravity wave parameters from gridded three-dimensional data: description, validation, and application
A novel method for the extraction of local gravity wave parameters from gridded three-dimensional data: description, validation, and application
复制标题
DOI：
10.5194/acp-18-6971-2018
复制
发表时间：
2018-05
影响因子：
6.3
通讯作者：
L. Schoon;C. Zülicke
中科院分区：
文献类型：
--
作者：
L. Schoon;C. Zülicke
抽象的。对于局部诊断波的性质，我们开发，验证，并应用一种新的方法，这是基于希尔伯特变换。它被称为统一波诊断（UWaDi）。它为网格化的三维数据提供任意网格点处的波振幅和三维波数。UWaDi是针对包括两个不同波包的合成测试用例进行验证的。与其他方法相比，UWaDi的性能是非常好的方面的波的属性和他们的位置。对于UWaDi的第一个实际应用，选择了2016年1月30日的轻微突然平流层变暖。通过对欧洲中期天气预报中心的静力惯性重力波分析，我们发现了整个中层大气中重力波的局部发生。利用诊断出的局部振幅和波数，讨论了局部波的垂直传播特性。我们还注意到一些线索本地惯性重力波产生平流层喷流从检测浅慢波在其出口区域附近。
Abstract. For the local diagnosis of wave properties, we develop, validate, and apply a novel method which is based on the Hilbert transform. It is called Unified Wave Diagnostics (UWaDi). It provides the wave amplitude and three-dimensional wave number at any grid point for gridded three-dimensional data. UWaDi is validated for a synthetic test case comprising two different wave packets. In comparison with other methods, the performance of UWaDi is very good with respect to wave properties and their location. For a first practical application of UWaDi, a minor sudden stratospheric warming on 30 January 2016 is chosen. Specifying the diagnostics for hydrostatic inertia–gravity waves in analyses from the European Centre for Medium-Range Weather Forecasts, we detect the local occurrence of gravity waves throughout the middle atmosphere. The local wave characteristics are discussed in terms of vertical propagation using the diagnosed local amplitudes and wave numbers. We also note some hints on local inertia–gravity wave generation by the stratospheric jet from the detection of shallow slow waves in the vicinity of its exit region.