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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. 5, pp. 187-194

Using spaceborne precipitation radar data to investigate variations of slope variance of large-scale waves in a slick

M.A. Panfilova 1 , V.Yu. Karaev 1 
1 Institute of Applied Physics RAS, Nizhny Novgorod, Russia
Accepted: 25.09.2017
DOI: 10.21046/2070-7401-2017-14-5-187-194
On 20 April 2010, the oil platform DeepWater Horizon exploded in the Gulf of Mexico, which was the biggest accident in history. As a result, oil film covered a sea surface area of several thousand square kilometers. Optical and microwave images with high resolutions were used for monitoring of the situation. The oil spill was so huge that, for the first time, data of a spaceborne precipitation radar with resolution of 5 km could be used to explore it. The dependence of contrast (the ratio of the backscattering cross section from oil-covered sea surface to the backscattering cross section from clean water surface) on viewing angle was calculated. Slope variance of large scale waves and backscattering cross section at nadir were obtained in the radar swath within the framework of the two-scale model of scattering surface using tangent plane approximation. In the paper, the distribution of total slope variance obtained from precipitation radar data (Ku-band) was juxtaposed with optical and microwave images. The dependence of total slope variance on wind speed was obtained for slick area from Ku-band data, an analogue to the well-known dependence for slope variance in optical band.
Keywords: oil spill, slope variance, precipitation radar
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