Atmospheric Rotors and Severe Turbulence in a Long Deep Valley
Atmospheric Rotors and Severe Turbulence in a Long Deep Valley
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长长的深谷中的大气转子和剧烈湍流
DOI：
10.1175/jas-d-15-0192.1
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发表时间：
2016
影响因子：
3.1
通讯作者：
V. Grubišić
中科院分区：
文献类型：
--
作者：
Lukas Strauss;S. Serafin;V. Grubišić
AbstractThe概念模型的大气转子的背景下，一个山谷，从地形诱导转子实验（T-REX）在2006年进行的数据在南部的山脉内华达州和欧文斯谷，加州。研究了所有具有强烈山波活动的T-REX病例，并详细介绍了其中4例（IOP 1、4、6和13）。他们的分析揭示了在强烈的跨山风期间可能在山谷中形成的各种转子状湍流结构。在山谷中的典型流动场景包括升高的湍流区，在山谷反转下坡流分离，在山谷西风和沿谷流的湍流相互作用，以及高度瞬态的山波和转子。这些情景可能与中纬度锋面系统穿越该区域的不同阶段有关。欧文斯谷的观测表明，经典转子概念的元素被调制，有时几乎完全抵消。
AbstractThe conceptual model of an atmospheric rotor is reexamined in the context of a valley, using data from the Terrain-Induced Rotor Experiment (T-REX) conducted in 2006 in the southern Sierra Nevada and Owens Valley, California. All T-REX cases with strong mountain-wave activity have been investigated, and four of them (IOPs 1, 4, 6, and 13) are presented in detail. Their analysis reveals a rich variety of rotorlike turbulent flow structures that may form in the valley during periods of strong cross-mountain winds. Typical flow scenarios in the valley include elevated turbulence zones, downslope flow separation at a valley inversion, turbulent interaction of in-valley westerlies and along-valley flows, and highly transient mountain waves and rotors. The scenarios can be related to different stages of the passage of midlatitude frontal systems across the region. The observations from Owens Valley show that the elements of the classic rotor concept are modulated and, at times, almost completely offset ...