ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 7, pp. 280-296

Investigation of coastal surface currents in the South-East Baltic based on concurrent drifter and satellite observations and numerical modeling

M.N. Golenko 1 , E.V. Krayushkin 2 , O.Yu. Lavrova 2 
1 P.P. Shirshov Institute of Oceanology RAS, Moscow, Russia
2 Space Research Institute RAS, Moscow, Russia
Accepted: 05.12.2017
DOI: 10.21046/2070-7401-2017-14-7-280-296
The results of field work carried out concurrently with satellite imaging in the summer periods of 2015–2016 in the South-East Baltic near the Sambian Peninsula are presented. Analysis and numerical simulation of the trajectories of two drifters released into the sea are performed. It is shown that the character of the drift of Lagrangian buoys can differ substantially from year to year, which is largely due to wind conditions and the intensity of vortex dynamics in the region. Numerical simulation of the Lagrangian drifters’ paths is carried out based on the Princeton Ocean Model (POM) adapted to the South-East Baltic and enhanced with a unit for calculating the trajectories of Lagrangian particles. In most cases, a close correspondence between the trajectories of model Lagrangian particles and drifters is obtained. Areas and meteorological conditions are determined in which drifters (particles) are mainly subject to advective displacement, while inertial oscillations do not significantly influence them. Also, we defined the conditions when inertial oscillations predominate, so that the particles get entrained into a drifting pattern of closed loops with diameters of ~2–6 km (in the near-surface layer). The diameter and shape of the loops essentially depend on background currents.
Keywords: concurrent experiments, surface circulation, Lagrangian drifters, numerical simulation, POM, South-East Baltic
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