Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2015, Vol. 12, No. 3, pp. 149-157
On the role of vortices in the transport of oil pollution in the Southeastern Baltic Sea (according to satellite monitoring)
A.I. Ginzburg
1 , E.V. Bulycheva
2 , A.G. Kostianoy
1,3 , D.M. Soloviev
1,4
1 P.P. Shirshov Institute of Oceanology RAS, Moscow, Russia
2 Atlantic Branch of P.P. Shirshov Institute of Oceanology RAS, Kaliningrad, Russia
3 Space Research Institute RAS, Moscow, Russia
4 Marine Hydrophysical Institute, Sevastopol, Russia
Based on the analysis of radar images of ASAR Envisat and quasi-synchronous optical imagery from radiometers MODIS Terra and Aqua, possible pathways of oil slicks detected in radar images of 30 July and 11 August 2004 in the southeastern part of the Baltic Sea are discussed with consideration of local mesoscale vortex dynamics and related information on wind speed and direction. It is shown that in the period from the 28 July to 11 August 2004, currents in the Gdansk Bay were determined by the evolution of a mesoscale anticyclonic vortex with dimensions of approximately 35 and 20 kilometers (along the longitudinal and transverse axes) and cyclones at its periphery. The direction of drift of the oil slicks, caught in the area of the vortex system and being under the combined influence of vortex motion and wind, will inevitably differ from the forecast of slicks spreading as a result of using the Seatrack Web numerical model, which does not resolve mesoscale vortices.
Keywords: southeastern Baltic Sea, radar images, optical images, oil pollution, vortices, vortex dipoles, forecast of oil spill drift
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