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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Современные проблемы дистанционного зондирования Земли из космоса
физические основы, методы и технологии мониторинга окружающей среды, потенциально опасных явлений
и объектов


Современные проблемы дистанционного зондирования Земли из космоса. 2020. Т. 17. № 6. С. 97-102

Deformation of film slicks on the water surface. Experiment and model

S.A. Ermakov 1 , O.A. Danilicheva 1 , I.A. Kapustin 1 , G.V. Leschev 1 , A.A. Molkov 1 
1 Institute of Applied Physics RAS, Nizhny Novgorod, Russia
Одобрена к печати: 15.09.2020
DOI: 10.21046/2070-7401-2020-17-6-97-102
Marine slicks are considered as imprints of various oceanic/atmospheric processes on the sea surface. Slicks from localized sources of surfactants, e. g. instant oil spills, are determined mostly by physical characteristics of surface films and by small-scale processes like wind waves until the slick scales become comparable with the scales of marine currents, internal waves, sub-mesoscale eddies, etc. At present, our understanding of the slick geometry and its evolution is still insufficient, partly because of the lack of systematic controlled experiments. Previously we reported on the results of some experiments and proposed a simple model of surfactant spills spreading accounting for the surface stresses induced by wind waves. This paper presents new results of field experiments on oil spill evolution and physical mechanisms of this evolution are discussed. The slick shape was studied using a methodology of contouring slicks with a GPS receiver onboard a motorboat. It is obtained that the cross-wind slick size grows quite slowly with time being almost independent on the wind, while the along-wind axis increases rapidly with wind velocity. A mechanism of “oil overflow” is hypothesized to explain the observed effects. A model taking into account the overflow mechanism is developed and is found to be consistent with observations.
Ключевые слова: slicks, film spreading, wind waves, sea surface, ocean remote sensing, radar/optical observations
Полный текст

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