Numerical analysis of the Black Sea currents and mesoscale eddies in 2006 and 2011

Two prognostic experiments taking into account real atmospheric forcing for 2006 and 2011 were carried out based on the eddy-resolving numerical model with a horizontal resolution of 1.6 km for the Black Sea. The main dynamic features such as the Rim Current, the Sevastopol, and Batumi anticyclones...

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Bibliographic Details
Published in:Ocean dynamics 2018-10, Vol.68 (10), p.1335-1352
Main Authors: Demyshev, Sergey Germanovich, Dymova, Olga Alekseevna
Format: Article
Language:English
Subjects:
28-31 August 2017
Anticyclones
Atmospheric forcing
Atmospheric Sciences
Baroclinic instability
Barotropic instability
Barotropic mode
Circulation
Coastal currents
Computer simulation
Dye dispersion
Earth and Environmental Science
Earth Sciences
Eddies
Eddy formation
Fluid- and Aerodynamics
General circulation
Geophysics/Geodesy
Inflow
Instability
Kinetic energy
Mathematical models
Mesoscale eddies
Mesoscale phenomena
Monitoring/Environmental Analysis
Numerical analysis
Numerical models
Ocean circulation
Oceanography
Russia
Sea currents
Topical Collection on the International Conference “Vortices and coherent structures: from ocean to microfluids”
Vertical diffusion
Viscosity
Vladivostok
Vortices
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Summary:Two prognostic experiments taking into account real atmospheric forcing for 2006 and 2011 were carried out based on the eddy-resolving numerical model with a horizontal resolution of 1.6 km for the Black Sea. The main dynamic features such as the Rim Current, the Sevastopol, and Batumi anticyclones are reproduced in both experiments. The model results are confirmed via observation data. We accomplished the analysis of simulated circulation and energetics. The results demonstrate that both the vertical viscosity and vertical diffusion along with the energy inflow from the wind have been the main contributors to the annual and seasonal budgets of kinetic and potential energies of the Black Sea circulation. It is shown that two regimes of the Black Sea general circulation are implemented depending on a magnitude of wind contribution to the kinetic energy in winter. Intensive mesoscale eddy formation was observed along the Anatolian, Caucasian, and Crimean coasts. The analysis of the Black Sea circulation and eddy energetics allowed us to conclude that the generation and development of the mesoscale coastal eddies is associated with the barotropic instability in case of intensive coastal currents and is associated with both the barotropic and baroclinic instability in case of weak coastal currents.
ISSN:1616-7341
1616-7228
DOI:10.1007/s10236-018-1200-6