Hydrodynamic modelling of mesoscale eddies in the Black Sea |
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| Authors: | Cecilia E Enriquez Georgy I Shapiro Alejandro J Souza Andrei G Zatsepin |
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| Institution: | (1) School of Earth, Ocean and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth, Devon, PL4 8AA, United Kingdom;(2) Proudman Oceanographic Laboratory, 6 Brownlow Street, Liverpool, L3 5DA, United Kingdom;(3) P.P. Shirshov Institute of Oceanology, 36, NakhimovskyProspekt, 117997 Moscow, Russia |
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| Abstract: | A three dimensional structure of mesoscale circulation in the Black Sea is simulated using the Proudman Oceanographic Laboratory
Coastal Ocean Modelling System. A number of sensitivity tests reveal the response of the model to changes in the horizontal
resolution, time steps, and diffusion coefficients. Three numerical grids are examined with x-fine (3.2 km), fine (6.7 km) and coarse (25 km) resolution. It is found that the coarse grid significantly overestimates
the energy of the currents and is not adequate even for the study of basin-scale circulation. The x-fine grid, on the other hand, does not give significant advantages compared to the fine grid, and the latter is used for
the bulk of simulations. The most adequate parameters are chosen from the sensitivity study and used to model both the basin-scale
circulation and day-to-day variability of mesoscale currents for the months of May and June of 2000. The model is forced with
actual wind data every 6 h and monthly climatic data for evaporation, precipitation, heat fluxes and river run-off. The results
of the fine grid model are compared favourably against the satellite imagery. The model adequately reproduces the general
circulation and many mesoscale features including cyclonic and anticyclonic eddies, jets and filaments in different parts
of the Black Sea. The model gives a realistic geographical distribution and parameters of mesoscale currents, such as size,
shape and evolution of the eddies. |
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| Keywords: | Modelling Eddies Black Sea Mesoscale |
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