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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >On the Estimation of Thickness of Marine Oil Slicks From Sun-Glittered, Near-Infrared MERIS and MODIS Imagery: The Lebanon Oil Spill Case Study
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On the Estimation of Thickness of Marine Oil Slicks From Sun-Glittered, Near-Infrared MERIS and MODIS Imagery: The Lebanon Oil Spill Case Study

机译：从阳光普照的近红外MERIS和MODIS影像估算海洋浮油的厚度：黎巴嫩溢油案例研究

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摘要

The detection of marine oil slicks using satellite sun-glittered optical imagery has been recently assessed. As the nature of the imaging mechanism involves the altered features of the wind-roughened oil-covered sea surface, it is expected that the radiation reflected from the oil–water system carries information about the physical properties of the floating oil layer. In this paper, we report an investigation on the capability to retrieve the average thickness of thin marine oil slicks by using the sun-glittered component of the solar radiation in the near-infrared (NIR) bands of MEdium Resolution Imaging Spectrometer Instrument (MERIS) and MODerate Resolution Imaging Spectroradiometer (MODIS) images. The developed procedure exploits the Cox and Munk model to compute sun glint reflectance at the sea surface level for both clean and oil polluted sea surface as well. It is assumed that the Fresnel reflection coefficient of the oil-water system carries the relevant optical dependence on oil layer thickness and oil type. The expected oil-water system reflectance is computed by taking into account the non-uniform spatial distribution of the oil volume. This is achieved by considering a pdf of oil thicknesses that matches the observations on controlled oil slicks already reported in the scientific literature. MERIS and MODIS images gathered during the Lebanon oil spill occurred on July and August 2006 were selected as case study. When available, co-located SAR imagery was also considered to corroborate NIR-detected oil slicks.
机译：最近已经评估了使用卫星阳光闪烁的光学图像检测海洋浮油的方法。由于成像机制的性质涉及被风粗糙化的被油覆盖的海面的变化特征，因此可以预期，油水系统反射的辐射会携带有关浮油层物理特性的信息。在本文中，我们报告了一项通过使用中等分辨率成像光谱仪（MERIS）的近红外（NIR）波段中太阳辐射的日光闪烁分量来检索薄薄海洋浮油平均厚度的能力的研究。和中等分辨率成像光谱仪（MODIS）图像。所开发的程序利用Cox和Munk模型来计算干净和受油污染的海面在海平面上的太阳闪光反射率。假定油水系统的菲涅耳反射系数对油层厚度和油类型具有相应的光学依赖性。通过考虑油量的不均匀空间分布来计算预期的油水系统反射率。通过考虑与科学文献中已有报道的受控浮油的观察结果相符的油厚pdf来实现此目的。案例研究选择了2006年7月和2006年8月黎巴嫩发生漏油事件期间收集的MERIS和MODIS图像。如果可用，位于同一地点的SAR图像也被认为可以证实NIR检测到的浮油。

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