Publications

Liu, ZL; Chen, J; Cui, TW; Tang, JW; Wang, L (2021). A combined semi-analytical algorithm for retrieving total suspended sediment concentration from multiple missions: a case study of the China Eastern Coastal Zone. INTERNATIONAL JOURNAL OF REMOTE SENSING, 42(20), 8004-8033.

Abstract
A new semi-analytical algorithm that retrieves the total concentration of suspended matter (TSM) was derived from the China Eastern Coastal Zone using multiple ocean colour instruments including the Visible Infrared Imaging Radiometer (VIIRS), the Moderate-resolution Imaging Spectroradiometer (MODIS), and the Medium Resolution Spectral Imager II (MERSI II). The algorithm in one model derives TSM concentration (C-TSM) from satellite inherent optical properties products for clear and moderately turbid water. For turbid waters, a second model with a four-band approach was used. The two model algorithms were combined into one algorithm using a linking weighted function to generate a smooth C-TSM for clear and turbid water and for water with intermediate transparency. Compared to eight existing algorithms, our new algorithm performed better with a wide dynamic range for the C-TSM retrievals. The mean absolute percent difference was 28.22% for the CECZ data and the C-TSM varied from 0.5 mg l(-1) to 2435.4 mg l(-1). New algorithm decreased the MAPD by >11% for the C-TSM retrievals compared to the eight existing algorithms. Furthermore, when new algorithm was tested with a synthetic data set that had been contaminated with residual error, it exhibited more residual error tolerance than the other algorithms when retrieving C-TSM, which agreed well with the results provided by a multi-mission consistency analysis. These results indicate that new algorithm could provide accurate and consistent multi-mission C-TSM from turbid coastal water with a widely varying range of C-TSM.

DOI:
10.1080/01431161.2021.1963498

ISSN:
0143-1161