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20 September 2020 Oil pollution hotspots on the Caspian Sea surface identified using satellite remote sensing
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Abstract
In this paper, we attempt to fill some gaps in the knowledge of the oil pollution pattern in the whole area of the Caspian Sea on the base of the remotely sensed data. We present the results of a long-term survey of the Caspian Sea by use of satellite SARs and multispectral sensors. Our primary attention is focused on the oil showings on the sea surface due to natural hydrocarbon emissions from the seabed. During our satellite survey, we discovered a previously unknown seep of petroleum hydrocarbons from the seabed in the shelf area of the Caspian Sea near the Cheleken Peninsula, which belongs administratively to Turkmenistan. We documented its source point as the persistent location of the origins of 379 oil slicks detected in satellite images taken over the area of interest. We also performed the precise estimation of the actual positions of two offshore seeps on the Iranian shelf near the Cape Sefid Rud on the base of 173 and 198 oil slicks correspondently. For these two regions of interest, we compare the release rates of the crude oil from the seabed to the sea surface. Further, we assess the detection rate of oil showings on the sea surface, depending on a sensor type and the season. We put together detailed maps of the sea surface oil pollution caused by natural hydrocarbons seepages on the seabed and determine areas of the high risks of sea surface oil pollution.
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Marina I. Mityagina and Olga Yu. Lavrova "Oil pollution hotspots on the Caspian Sea surface identified using satellite remote sensing", Proc. SPIE 11529, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2020, 115290L (20 September 2020); https://doi.org/10.1117/12.2573501
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