title: Total suspended matter observation in the Pearl River estuary from in situ and MERIS data.
abstract: Based on the cruise data collected in the Pearl River estuary (PRE) in May 2008, an empirical two-band model by using the ratio of R (rs) at 629 and 671 nm was established to retrieve total suspended matter (TSM) concentration with the determination coefficient (R(2)) of 0.854, mean relative error (MRE) of 7.483%, and root-mean-square error (RMSE) of 1.295 mg L( - 1). To match with medium resolution imaging spectrometer (MERIS) bands, in situ remote sensing reflectance was re-sampled to the bandwidth of 10 nm. The relationship between TSM and re-sampled R (rs) at 620 nm (MERIS band 6) and 665 nm (MERIS band 7) are obtained (R(2) = 0.748, RMSE = 1.697 mg L( - 1), MRE = 8.785%, n = 13). Additionally, to map the spatial distribution of TSM in the PRE, MERIS level_1B data were calibrated using a multiple linear regression model based on in situ R (rs). Another dataset collected in the PRE in January 2004 was used to validate the two-band model and also applied to map TSM distribution from MERIS image. The comparison between measured TSM values and modeled ones showed satisfactory results (R(2) = 0.753, MRE = 22.199%, and RMSE = 2.603 mg L( - 1)).
authors.affiliation: Institute of Space and Earth Information Science, Yuen Yuen Research Centre for Satellite Remote Sensing, The Chinese University of Hong Kong, Shatin, NT, Hong Kong.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Xi
authors.forename: Yuanzhi
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D002681:China; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D058998:Remote Sensing Technology / Q000295:instrumentation*; D045483:Rivers / Q000737:chemistry*; D013057:Spectrum Analysis; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D014874:Water Pollutants, Chemical
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