Chen, Jun; Cui, Tingwei; Tang, Junwu; Song, Qingjun (2014). Remote sensing of diffuse attenuation coefficient using MODIS imagery of turbid coastal waters: A case study in Bohai Sea. REMOTE SENSING OF ENVIRONMENT, 140, 78-93.
Abstract
The objectives of this study are to evaluate the applicability of three existing retrieval algorithms of diffuse attenuation coefficients of downwelling irradiance at 490 nm, K-d(490), for turbid Case II waters, and to improve these existing models using a simple semi-analytical (SSA) model. In this study, based on comparison of the K-d(490) predicted by these models with field measurements taken in the Bohai Sea and Yellow Sea, it is shown that the SSA model provides a stronger performance than these three selected existing models. The atmospheric influences on the MODIS data are removed using an improved shortwave infrared band-based (ISWIR-based) model, which is capable of retrieving spectral remote sensing reflectance within 19% uncertainty. The K-d(490) data was quantified from the MODIS images after atmospheric correction using the SSA model and Wang's model. The study results indicate that the SSA model produces 31.51% uncertainty in deriving K-d(490) from MODIS data, which is 12.1% higher than Wang's model. This study demonstrates the potential of the SSA model in estimating K-d(490) even in highly turbid coastal waters. (C) 2013 Elsevier Inc. All rights reserved.
DOI:
10.1016/j.rse.2013.08.031
ISSN:
0034-4257; 1879-0704