Numerical Modeling of Water Exchange through the Kerch Strait for Various Types of the Atmospheric Impact

Fomin, V. V.; Lazorenko, D. I.; Fomina, I. N.

doi:10.22449/1573-160x-2017-4-79-89

Cited by 6 publications

(5 citation statements)

References 4 publications

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“…Thus, initial spreading of the AP from its source at the Kerch Strait is forced by a north-easterly wind. As a result, the AP forms a quasi-geostrophic coastal current in response to downwelling-favourable wind forcing, which was addressed in many previous studies (Garvine, 1987;Yankovsky and Chapman, 1997;and Fong and Geyer, 2002). Spreading of the AP in different directions, e.g.…”

Section: Spreading Of the Ap In The Black Seamentioning

confidence: 96%

Water exchange between the Sea of Azov and the Black Sea through the Kerch Strait

et al. 2020

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The Sea of Azov is a small, shallow, and freshened sea that receives a large freshwater discharge. Under certain external forcing conditions low-salinity waters from the Sea of Azov flow into the north-eastern part of the Black Sea through the narrow Kerch Strait and form a surface-advected buoyant plume. Water flow in the Kerch Strait also regularly occurs in the opposite direction, which results in the spreading of a bottom-advected plume of saline and dense waters from the Black Sea into the Sea of Azov. In this study we focus on the physical mechanisms that govern water exchange through the Kerch Strait and analyse the dependence of its direction and intensity on external forcing conditions. Analysis of satellite imagery, wind data, and numerical modelling shows that water exchange in the Kerch Strait is governed by a wind-induced barotropic pressure gradient. Water flow through the shallow and narrow Kerch Strait is a one-way process for the majority of the time. Outflow from the Sea of Azov to the Black Sea is induced by moderate and strong north-easterly winds, while flow into the Sea of Azov from the Black Sea occurs during wind relaxation periods. The direction and intensity of water exchange have wind-governed synoptic and seasonal variability, and they do not depend on the rate of river discharge to the Sea of Azov on an intraannual timescale. The analysed data reveal dependencies between wind forcing conditions and spatial characteristics of the buoyant plume formed by the outflow from the Sea of Azov.Published by Copernicus Publications on behalf of the European Geosciences Union.

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Section: Spreading Of the Ap In The Black Seamentioning

confidence: 96%

Water exchange between the Sea of Azov and the Black Sea through the Kerch Strait

et al. 2020

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“…To study seiche oscillations in the Sevastopol and Quarantine bays, the numerical hydrodynamic Advanced Circulation Model for Shelves Coasts and Estuaries (ADCIRC) was used in this work; its detailed description is given in [17][18][19][20]. Below the model variant based on linearized depth equations of motion averaged over depth without taking into account the Coriolis force was used:…”

Section: Numerical Model and Algorithm For Estimating Periods Of Seicmentioning

confidence: 99%

Investigation of Seiche Oscillations in the Adjacent Bays by the Example of the Sevastopol and the Quarantine Bays

Manilyuk¹,

Lazorenko²,

Фомін³

2020

PhO

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Purpose. The paper is aimed at studying the seiche structure in the adjacent bays' system of real configuration. Methods and Results. The response of the Sevastopol and Quarantine bays (Black Sea) to sea level fluctuations set at the open boundary of the computational domain has been studied. A number of random harmonics within the range of the eigen periods of these bays were used as fluctuations. The ADCIRC numerical model was applied for simulating. The numerical experiments were performed for three ranges obtained from the analytical estimates: 30–52, 8–30 and 1–15 min. The energy-bearing periods of seiche oscillations were revealed for both bays. The mutual influence of these bays was also studied. Conclusions. The above mentioned wave disturbances lead to generation of the seiche oscillations in the bays. For the Sevastopol Bay, their periods are 48, 22, 16, 10 and 6 min, for the Quarantine Bay – 11.4 and 4.8 min. The number of the generated modes is determined by the interval of the wave disturbance periods. The bays have a mutual influence on each other due to the wave energy exchange through their entrances. At that intensity of the eigen modes of the Sevastopol Bay penetrating the Quarantine Bay can exceed intensity of those of the Quarantine Bay. In both bays, the seiches with the largest amplitudes are induced by the disturbances, the periods of which are in the interval 30–52 min.

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“…To simulate resonant oscillations in a system of adjacent bays, a linear version of the numerical hydrodynamic ADCIRC (Advanced Circulation Model for Shelves Coasts and Estuaries) model was used [8,9]. The initial equations of the model have the following form…”

Section: Numerical Model and Selection Of Parametersmentioning

confidence: 99%

Resonance Oscillations in the System of Adjacent Bays

Manilyuk

Lazorenko

Фомін

2019

PhO

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The paper is aimed at studying both resonance response of a system of two model bays to the initial disturbance of free surface induced by the sea bottom motion and mutual influence of the adjacent bays. Methods and Results. Based on the numerical hydrodynamic ADCIRC model, including the method of finite elements, studied is the resonance response of two adjacent bays (A and B; rectangular form, certain dimensions and depths) similar to the Sevastopol and Karantinnaya bays, respectively, to the initial disturbance of free surface induced by the sea bottom motion. The calculations were carried out at different dimensions of the initial disturbance area both for the system of two adjacent bays and individually for each bay. Conclusions. Initial disturbance generates in the Bay A four lowest modes of eigen-oscillations with the periods 45, 15, 9 and 6 min., and in the bay Btwo lowest modes with the periods 12 and 4 min. The obtained periods are in good agreement with the analytical estimates. Presence of the adjacent bay gives rise to intensification of the Helmholtz mode in each of them. External disturbance with the period 11.7 min. constitutes potential danger for the bay B since, in such a case, resonance with its Helmholtz mode occurs. The analytically obtained dependence between the periods of the infragravity waves and the average periods of the wind waves in the Sevastopol region (resulted from the retrospective analysis of waves) permitted to reveal theoretical possibility of generating shortperiod seiches by the infra-gravity waves in both bays.

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Numerical Modeling of Water Exchange through the Kerch Strait for Various Types of the Atmospheric Impact

Cited by 6 publications

References 4 publications

Water exchange between the Sea of Azov and the Black Sea through the Kerch Strait

Water exchange between the Sea of Azov and the Black Sea through the Kerch Strait

Investigation of Seiche Oscillations in the Adjacent Bays by the Example of the Sevastopol and the Quarantine Bays

Resonance Oscillations in the System of Adjacent Bays

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