Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2018, Vol. 15, No. 2, pp. 171-182
Seasonal variability of oil pollution in the Southeastern Baltic Sea
E.V. Krek
1 , A.V. Krek
1, 2 , A.G. Kostianoy
1, 3 1 P.P. Shirshov Institute of Oceanology RAS, Moscow, Russia
2 Immanuel Kant Baltic Federal University, Kaliningrad, Russia
3 S. Yu. Witte Moscow University, Moscow, Russia
Accepted: 26.01.2018
DOI: 10.21046/2070-7401-2018-15-2-171-182
The paper presents the results of operational satellite monitoring of oil pollution of the sea surface in the Southeastern Baltic in 2004–2015, and monthly in-situ measurements of the concentration of oil products near offshore ice-resistant fixed platform (OIFP) D-6 from 2011 to 2015. The study of the inter-seasonal dynamics of the number of oil spills and the area of oil pollution by satellite data revealed a maximum in the spring-summer period. Most of the spills (88 %), which account for the largest part of the total area of oil pollution (94 %), were found from March to September, probably due to the limitation of the radar method for wind speed at the time of satellite observation. At sufficiently uniform values of the concentration of oil products in the surface layer, the maximum of the average measured values fell in spring and did not exceed the maximum permissible concentration. Minimum values were recorded in winter and autumn. Comparison of satellite observations and direct measurements of the concentration of oil products in the surface water layer for the period 2011–2015 showed a high correlation coefficient. Intensive wind and convective mixing explain the minimum values of the concentration of oil products in the surface layer of the sea in the autumn-winter period.
Keywords: The Baltic Sea, radar images, oil pollution, concentration of oil products, seasonal variability of oil pollution
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