Paper Info
Title
Polarized Remote Inversion of the Refractive Index of Marine Spilled Oil From PARASOL Images Under Sunglint
Abstract
The ability to detect oil spills remotely is important in marine environmental monitoring. The optical polarization remote sensing has the unique advantage of inversion of refractive index of spilled oils which is the key parameter for calculation of sunglint reflectance. Compared to nonpolarization optical image, the degree of linear polarization (DOLP) of spilled oil’s sunglint depends on the refractive index and viewing angles but not on the surface roughness. Accurate correction of sunglint reflectance can promote optical estimation of spilled oils. In this article, a polarized optical model was used to calculate equivalent refractive index of Deepwater Horizon (DWH) spilled oils using space-borne Polarization and Anisotropy of Reflectances for Atmospheric Sciences coupled with Observations from a Lidar (PARASOL) images covering Gulf of Mexico (GOM) in 2010. When the angle ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\theta _{m}$ </tex-math></inline-formula> ) between the direction of the flat surface specular reflection and that of observation is less than 20°, the PARASOL-derived and modeled DOLPs agree well, and the atmospheric polarization effects can be neglected. The equivalent refractive index of the spilled oil area, which implies the relative proportions of seawater and spilled oil in each pixel, could be estimated using polarized remote sensing under sunglint. Furthermore, if the relationship between the equivalent refractive index and remote sensing reflectance ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$R_{rs}$ </tex-math></inline-formula> ) of spilled oils in the remote sensing images can be given, it might be used to correct the sunglint effect on various spilled oils, thereby leading to an improvement for optical quantifying spilled oil volume.
Year
DOI
Venue
2020
10.1109/TGRS.2019.2953640
IEEE Transactions on Geoscience and Remote Sensing
Keywords
DocType
Volume
Equivalent refractive index,marine spilled oils,polarization and anisotropy of reflectances for atmospheric sciences (PARASOL),polarized optical remote sensing,sunglint
Journal
58
Issue
ISSN
Citations 
4
0196-2892
0
PageRank 
References 
Authors
0.34
0
6
Name
Order
Citations
PageRank
Yang Zhou100.34
Yingcheng Lu273.09
Yafeng Shen300.34
Jing Ding400.68
Minwei Zhang594.18
Zhihua Mao6149.52