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Hydraulic and Wave Aspects of Novorossiysk Bora

机译：Novorossiysk Bora的液压和波浪方面

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摘要

Bora in Novorossiysk (seaport on the Black Sea coast of the Caucasus) is one of the strongest and most prominent downslope windstorms on the territory of Russia. In this paper, we evaluate the applicability of the hydraulic and wave hypotheses, which are widely used for downslope winds around the world, to Novorossiysk bora on the basis of observational data, reanalysis, and mesoscale numerical modeling with WRF-ARW. It is shown that mechanism of formation of Novorossiysk bora is essentially mixed, which is expressed in the simultaneous presence of gravity waves breaking and a hydraulic jump, as well as in the significant variability of the contribution of wave processes to the windstorm dynamics. Effectiveness of each mechanism depends on the elevated inversion intensity and mean state critical level height. Most favorable conditions for both mechanisms working together are moderate or weak inversion and high or absent critical level.
机译：诺沃罗西斯克（高加索黑海海岸的海港）的波拉是俄罗斯领土上最强和最显著的下坡风暴之一。在本文中，我们根据观测数据、再分析和WRF-ARW中尺度数值模拟，评估了世界各地广泛用于下坡风的水力和波浪假设对Novorossiysk bora的适用性。研究表明，诺沃罗西斯克波拉的形成机制基本上是混合的，表现为重力波破碎和水跃的同时存在，以及波过程对风暴动力学贡献的显著可变性。每种机制的有效性取决于提高的反转强度和平均态临界能级高度。两种机制共同工作的最有利条件是中等或弱反转和高或无临界水平。

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