Refinement of the Critical Angle Calculation for the Contrast Reversal of Oil Slicks under Sunglint
Refinement of the Critical Angle Calculation for the Contrast Reversal of Oil Slicks under Sunglint
复制标题
日照下浮油对比反转临界角计算的细化
DOI：
10.1002/2015jc011001
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Hu Chuanmin
中科院分区：
文献类型：
--
作者：
Lu Yingcheng;Sun Shaojie;zhang Minwei;Murch Brock;Hu Chuanmin
长期以来，已经观察到，在Sunglint下的石油滑水可以扭转其与附近无油的海水的光学对比度。这种现象已经通过对Sunglint强度的经验统计分析进行了描述，并对理论进行了建模
It has long been observed that oil slicks under sunglint can reverse their optical contrast against nearby oil-free seawater. Such a phenomenon has been described through both empirical statistical analysis of the sunglint strength and modeled theoretically using a critical angle concept. The critical angle, in this model, is the angle at which the image pixels show no or negligible contrast between oiled and nonoiled seawater. Pixels away from this critical angle show either positive or negative contrast from the oil-free pixels. Although this concept has been fully demonstrated in the published literature, its calculation needs to be further refined to take into account: (1) the different refractive indices of oil slicks (from natural seeps) and seawater and (2) atmospheric effects in the sensor-measured radiance. Using measurements from the Moderate Resolution Imaging Spectroradiometer (MODIS) over oil films in the Gulf of Mexico, we show improvement in the modeled and MODIS-derived reflectance over oil slicks originated from natural seeps after incorporating these two factors in the model. Specifically, agreement between modeled and measured sunglint reflectance is found for both negative and positive-contrasting oil slicks. These results indicate that surface roughness and reflectance from oil films can be estimated given any solar/viewing geometry and surface wind. Further, this model might be used to correct the sunglint effect on thick oil under similar illumination conditions. Once proven possible, it may allow existing laboratory-based models, which estimate oil thickness after such corrections, to be applied to remote sensing imagery.
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DOI：
10.1029/2011gm001121
发表时间：
2013-03
期刊：
--
影响因子：
--
作者：
Yonggang Liu;R. Weisberg;Chuanmin Hu;Lianyuan Zheng
通讯作者：
Yonggang Liu;R. Weisberg;Chuanmin Hu;Lianyuan Zheng
影响因子：
1.9
作者：
M. Wang;S. Bailey
通讯作者：
M. Wang;S. Bailey
影响因子：
--
作者：
C. Jackson;W. Alpers
通讯作者：
C. Jackson;W. Alpers
基于两波束干涉模型的海上浮油厚度遥感反演理论
DOI：
10.1007/s11430-010-4154-1
发表时间：
2011-01
期刊：
Science China Earth Sciences
影响因子：
--
作者：
Lu, Ying Cheng1;Tian, Qing Jiu1;Li, Xiang2
通讯作者：
Li, Xiang2
影响因子：
1.7
作者：
I. MacDonald;I. Leifer;R. Sassen;P. Stine;R. Mitchell;N. Guinasso
通讯作者：
I. MacDonald;I. Leifer;R. Sassen;P. Stine;R. Mitchell;N. Guinasso