Structure of dynamic fields in the Southeastern Baltic during wind forcings that cause upwelling and downwelling

The peculiarities of the space-time structures of the currents in the sea appearing after wind forcings that cause upwelling and downwelling are investigated. Numerical modeling using the Princeton Ocean Model (POM) and data analysis were performed for the local area of the Southeastern Baltic adjacent to the Kaliningrad Region (Russia). The geostrophic and ageostrophic velocity components were distinguished to determine the peculiar features of different types of currents. We suggest considering the collinearity coefficient: the scalar product of the geostrophic and ageostrophic velocity vectors. We also considered the local vorticity and turbulent viscosity. Their difference during the upwelling and downwelling was noted. The data of the current velocity simulations and the ADCP measurements at the location of the D-6 oil platform (the Kravtsov oil field) were compared. The modeling adequately reproduces the most energetic geostrophic jet currents and their space-time characteristics.