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Springer Geology

ISSN:21979545

2022

10.1007/978-3-030-85851-3_8

Hydrophysical fields and arrays of kinetic and potential energy budget components, continuous in time and space, were reconstructed on the basis of a thermohydrodynamic model and observational measurements of temperature and salinity in 2007 and 2009 in the region of western Crimea. To implement the procedure of assimilation of data observations, we used a four-dimensional analysis, based on a Kalman filter, taking into account the heterogeneity and non-isotropy of error estimates of temperature and salinity. We used a real atmospheric forcing and a high resolution (a horizontal grid ~1.6 × 1.6 km and 30 vertical layers from 1 to 1200 m). The change of kinetic energy was determined mainly by wind action, vertical friction and the work of pressure forces; change in potential energy—by advection of potential energy. The calculated fields of currents were characterized by mesoscale eddy formations and jet currents. A horizontal velocity shear (resulting from the negative work of the wind force) and current flow around the coastline under the action of weak winds could be possible mechanisms of the generation of coastal mesoscale and submesoscale eddies in the coastal zone. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Assimilation of observational data, Black Sea, Jet currents, Mesoscale and Submesoscale Eddies, Numerical modeling

2022-02-15 14:48:26