On Capabilities of Tracking Marine Surface Currents Using Artificial Film Slicks

Kapustin, Ivan A.; Shomina, Olga V.; Ermoshkin, Alexey V.; Bogatov, N. A.; Kupaev, Alexander V.; Molkov, A.A.; Ермаков, С. А.

doi:10.3390/rs11070840

Cited by 15 publications

(16 citation statements)

References 33 publications

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“…An important distinguishing feature of the slick formed by a film of surfactants carried out by gas bubbles from a damaged underwater gas pipeline will be the relative immobility of the source of surfactants. This means that even if the surfactant spot is strongly pulled by wind and current, one end of the slick, the so-called "head" of the slick, will always be located above the area of the gas leakagethe source of surfactants (similarly, [25,26]).…”

Section: Problem Statementmentioning

confidence: 99%

Investigation of the possibility of remote detection of gas outlets in the sea using X-band radar

Smirnova¹,

Kapustin²,

Ermoshkin³

2020

Sovr. Probl. DZZ Kosm.

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Section: Problem Statementmentioning

confidence: 99%

Investigation of the possibility of remote detection of gas outlets in the sea using X-band radar

Smirnova¹,

Kapustin²,

Ermoshkin³

2020

Sovr. Probl. DZZ Kosm.

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“…Естественные пленки биологического происхождения интересны как индикаторы биопродуктивности и зон эвтрофикации [2,10]. Порождаемые ими выглаживания поверхности моря (слики) визуализируют особенности течений, внутренние волны и зоны конвергенции [1, [11][12][13].…”

Section: Introductionunclassified

Spectral Contrasts of Short Wind Waves in Artificial Slicks from the Sea Surface Photographs

Дулов¹,

Yurovskaya²

2021

MGZh

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Purpose. The aim of the work is to evaluate the contrasts between the two-dimensional spectra of the short wind waves on a clean sea surface and on the surface covered by a thin film of vegetable oil. The contrast angular dependence, which is still not understood, is of particular interest. The study is intended to widen the base of empirical notions of wave suppression on the surfactant films in field conditions. Its results may be useful both for theoretical modeling the short wind wave spectra, and for developing the methods for remote monitoring of the ocean. Method and Results. The contrasts were assessed by analyzing the sea surface photographs taken from the Platform of the Black Sea hydrophisical subsatellite polygon (Katsiveli) during the specialized experiments aimed at obtaining artificial slicks using vegetable oil spills. The applied in the study simple method for estimating the contrasts is based on the assumptions of a linear relationship between the brightness and the sea surface slope, and of the invariability of the brightness – slope transfer function at transition from a clean sea surface to a slick. In contrast to the previously applied methods, this approach makes it possible to obtain the contrasts varying both in wavenumber and direction. Obtaining the estimates of the shortest wave characteristics usually constitutes the utmost technical difficulty. In the work, the spectral contrasts are evaluated for the wind waves whose lengths are from ~ 20 to ~ 1 cm. Conclusions. At moderate wind speeds (6–8 m/s), the obtained contrasts increase monotonically with the wavenumber up to the values ~ 10. Under calm conditions (wind speed 0.5 m/s), the spectral contrast maximum (~ 30–50) is observed at the wavenumber peak ~ 100 rad/m that is qualitatively confirmed by the estimates from a string wave gauge. These results are consistent with the previous measurements performed by the other authors. The two-dimensional contrast distributions are anisotropic with the maximum in the direction perpendicular to the wind one. At moderate winds, the anisotropy increases with growth of a wavenumber.

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“…Natural films of biological origin are interesting as indicators of bioproductivity and eutrophication zones [2,10]. The sea surface smoothing (slicks) generated by them visualizes the features of currents, internal waves and convergence zones [1,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Spectral Contrasts of Short Wind Waves in Artificial Slicks from the Sea Surface Photographs

Дулов¹,

Yurovskaya²

2021

PhO

View full text Add to dashboard Cite

Purpose. The aim of the work is to evaluate the contrasts between the two-dimensional spectra of the short wind waves on a clean sea surface and on the surface covered by a thin film of vegetable oil. The contrast angular dependence, which is still not understood, is of particular interest. The study is intended to widen the base of empirical notions of wave suppression on the surfactant films in field conditions. Its results may be useful both for theoretical modeling the short wind wave spectra, and for developing the methods for remote monitoring of the ocean. Methods and Results. The contrasts were assessed by analyzing the sea surface photographs taken from the Platform of the Black Sea hydrophisical subsatellite polygon (Katsiveli) during the specialized experiments aimed at obtaining artificial slicks using vegetable oil spills. The applied in the study simple method for estimating the contrasts is based on the assumptions of a linear relationship between the brightness and the sea surface slope, and of the invariability of the brightness – slope transfer function at transition from a clean sea surface to a slick. In contrast to the previously applied methods, this approach makes it possible to obtain the contrasts varying both in wavenumber and direction. Obtaining the estimates of the shortest wave characteristics usually constitutes the utmost technical difficulty. In the work, the spectral contrasts are evaluated for the wind waves whose lengths are from ~ 20 to ~ 1 cm. Conclusions. At moderate wind speeds (6–8 m/s), the obtained contrasts increase monotonically with the wavenumber up to the values ~ 10. Under calm conditions (wind speed 0.5 m/s), the spectral contrast maximum (~ 30–50) is observed at the wavenumber peak ~ 100 rad/m that is qualitatively confirmed by the estimates from a string wave gauge. These results are consistent with the previous measurements performed by the other authors. The two-dimensional contrast distributions are anisotropic with the maximum in the direction perpendicular to the wind one. At moderate winds, the anisotropy increases with growth of a wavenumber.

show abstract

On Capabilities of Tracking Marine Surface Currents Using Artificial Film Slicks

Cited by 15 publications

References 33 publications

Investigation of the possibility of remote detection of gas outlets in the sea using X-band radar

Investigation of the possibility of remote detection of gas outlets in the sea using X-band radar

Spectral Contrasts of Short Wind Waves in Artificial Slicks from the Sea Surface Photographs

Spectral Contrasts of Short Wind Waves in Artificial Slicks from the Sea Surface Photographs

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