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Relationship between the effective attenuation coefficient of spaceborne lidar signal and the IOPs of seawater

TitleRelationship between the effective attenuation coefficient of spaceborne lidar signal and the IOPs of seawater
Publication TypeJournal Article
Year of Publication2018
AuthorsLiu Q., Liu D., Bai J., Zhang Y.P, Zhou Y.D, Xu P.T, Liu Z.P, Chen S., Che H.C, Wu L., Shen Y.B, Liu C.
JournalOptics Express
Date Published2018/11
Type of ArticleArticle
ISBN Number1094-4087
Accession NumberWOS:000449972600056
Keywordsatmosphere; light; model; monte-carlo; ocean; Optics; phase function; scattering; simulations

Multiple scattering is an inevitable effect in spaceborne oceanic lidar because of the large footprint size and the high optical density of seawater. The effective attenuation coefficient klidar in the oceanic lidar equation, which indicates the influence of the multiple scattering effect on the formation of lidar returns, is an important parameter in the retrieval of inherent optical properties (IOPs) of seawater. In this paper, the relationships between klidar of the spaceborne lidar signal and the IOPs of seawater are investigated by solving the radiative transfer equation with an improved semianalytic Monte Carlo model. Apart from the geometric loss factors, klidar is found to decrease exponentially with the increase of depth in homogeneous waters. klidar is given as an exponential function of depth and IOPs of seawater. The mean percentage errors between klidar calculated by the exponential function and the simulated ones in three typical stratified waters are within 0.5%, proving the effectiveness and applicability of this klidar-IOPs function. The results in this paper can help researchers have a better understanding of the multiple scattering effect of spaceborne lidar and improve the retrieval accuracy of the IOPs and the chlorophyll concentration of case 1 water from spaceborne lidar measurements. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Short TitleOpt. Express
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