Modeling of the Novorossiysk bora. Part 2. Energetics of the atmosphere at the Novorossiysk bora

R B Berzegova; V N Kozhevnikov; M K Bedanokov

doi:doi:10.2205/2019ES000685

Modeling of the Novorossiysk bora. Part 2. Energetics of the atmosphere at the Novorossiysk bora

Published в Russian Journal of Earth Sciences · Volume 20, Issue 1, 2020 · Pages 1–8 · Rubrics: ORIGINAL ARTICLES

DOI 10.2205/2019ES000685

Received: 25.02.2020 Accepted: 25.02.2020 Published: 25.02.2020 Language of publication: ENG

Authors

R B Berzegova ¹ · V N Kozhevnikov ² · M K Bedanokov ³

1 Maykop State Technological University

2 Lomonosov Moscow State University

3 Maykop State Technological University

ABSTRACT

Important features of the Novorossiysk bora are being investigated using a nonlinear analytical stationary two-dimensional model. Vertical unboundedness of the atmosphere, characteristic features of the shape of the streamlined mountains, the effect of the upper layers on the disturbances in the troposphere are considered. For the first time disturbances are being studied in a wide range of changes in the features of an incident flow. It has been shown that disturbances quite often assume a rotor nature in the leeward zone behind the mountains, and the dependence of disturbances on the wave scale is decreasing only on average, and noticeable deviations from it are oscillatory in nature and depend on the level of reflection of wave energy from the upper layers. Jet stream velocity at the leeward slope estimates energetics of disturbances behind the mountains. It has been shown that its value lies in the range of 18-22 m/s under normal conditions. It has been testified that a sharp cooling in event of a bora is determined not by the process of flowing around the mountains, but by the arrival of a colder air mass. It has been concluded that an increase in speed indicator in the surface layer turbulent layer beyond the mountains is determined by the height and steepness of the leeward slope of the mountains, the effects of turbulence behind the mountains and is very sensitive to changes in the flow velocity at the leeward slope of the mountains.

KEYWORDS

Atmosphere physics hydrodynamics modelling mountainflow wave frequency Lira wave scale Novorossiysk bora

Information References

Authors:

1. Maykop State Technological University

2. Lomonosov Moscow State University

3. Maykop State Technological University

Type:

Article

Pages:

from 1 to 8

Status:

Published

Language:

English

Keywords:

Atmosphere physics, hydrodynamics, modelling, mountainflow, wave frequency, Lira wave scale, Novorossiysk bora

Funding

The research has been conducted as part of assignment No. 5.9533.2017/BCH for the implementation of a project on the theme "Investigation of the environmental geoecology of the North-West Caucasus and specially protected natural territories".

References

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Modeling of the Novorossiysk bora. Part 2. Energetics of the atmosphere at the Novorossiysk bora

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