Open AccessAnalysis of hydrophysical fields in the northern part of the Black Sea on the basis of assimilation in the hydrodynamic model of temperature and salinity observations in the summer season of 2016
Author(s) -
С. Г. Демышев,
N. A. Evstigneeva,
О. А. Дымова
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1359/1/012069
Subject(s) - advection , eddy , anticyclone , geology , temperature salinity diagrams , ocean gyre , climatology , data assimilation , salinity , geostrophic current , oceanography , environmental science , ocean current , turbulence , meteorology , geography , physics , subtropics , fishery , biology , thermodynamics
A numerical experiment was conducted to reconstruct the fields of the currents, the level, temperature and salinity of the Black Sea for the summer season of 2016 on the basis of the hydrodynamic model that included nonlinear equations of motion, advection equations of heat and salt. We used a high spatial resolution (horizontal grid ∼1.6 ×1.6 km and 27 vertical layers) and real atmospheric forcing. The assimilation procedure of observational data was based on a modified Kalman filter taking into account the heterogeneity and non-isotropy of estimates of the temperature and salinity fields. Areas of generation of meso- and submesoscale features of hydrophysical fields were determined in the northern part of the Black Sea (eddies of different signs of rotation with a radius of about 30 km in the western part of the region, a cyclonic eddy with a radius of about 40 km in the eastern deep-water part of the region, anticyclonic eddy with a radius of about 25 km near the city of Yalta, intense jets along the Crimean coast and eddies of small scales of a different sign of rotation along the coast of Crimea and on the north-western shelf) and possible reasons of their formation were discussed.