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The impact of sea bottom effects on the retrieval of water constituent concentrations from multispectral satellite images in complex shallow tidal waters supported by radiative transfer modeling

Titelangaben

Arabi, Behnaz ; Salama, Mhd. Suhyb ; van der Wal, Daphne ; Pitarch, Jaime ; Verhoef, Wouter:
The impact of sea bottom effects on the retrieval of water constituent concentrations from multispectral satellite images in complex shallow tidal waters supported by radiative transfer modeling.
In: Remote Sensing of Environment. Bd. 237 (2020) . - 111596.
ISSN 0034-4257
DOI: https://doi.org/10.1016/j.rse.2019.111596

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Abstract

Many coastal waters include large areas of Optically Shallow Waters (OSWs) ‎where the sea-bottom affects above-water observations of remote sensing ‎reflectance (Rrs [sr−1]). If not treated, the effect of bottom reflectance will ‎interfere with the correct retrieval of Water Constituent Concentrations ‎‎(WCCs) from hyperspectral and multispectral remote sensing observations. ‎To study this phenomenon in more detail, the existing semi-infinite ‎‎2SeaColour Radiative Transfer (RT) model was modified into a finite water ‎layer model, bounded by a diffusely reflecting surface at the sea-bottom. ‎From simulations with the new model, called Water - Sea Bottom (WSB) ‎model, it was observed that a ratio of spectral bands in the Near-Infrared, ‎bands 750 nm and 900 nm, is nearly insensitive to the WCCs and increases ‎with the shallowness of the water, and therefore can be used as a robust index ‎to detect OSWs. The newly established Near-Infrared Bottom Effect Index ‎‎(NIBEI) was applied to a series of satellite observations over the Wadden Sea ‎during high and low tidal phases. Images from the MEdium Resolution ‎Imaging Spectrometer (MERIS) and the Ocean and Land Colour Instrument ‎‎(OLCI) were processed to retrieve WCCs of the study area. The results indicate ‎that the sea-bottom effect in OSWs affects the accuracy of atmospheric ‎correction and retrievals. On the other hand, applying the NIBEI to flag OSWs ‎improves the reliability and consistency of WCCs maps. The application of ‎proposed NIBEI on satellite images requires only Top Of Atmosphere (TOA) ‎radiances at 750 nm and 900 nm and does not depend on atmospheric ‎correction and ancillary local input data (e.g., bathymetry map, bottom type, ‎empirical coefficients, in-situ measurements). As a result, the proposed NIBEI ‎can readily be applied to detect OSWs on various ocean colour remote sensors ‎in various shallow coastal regions.‎‎

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Nein
Keywords: Remote sensing; Water quality monitoring; OLCI; Sentinel-3;MERIS; Optically shallow waters; Tidal waters; The Wadden Sea; Sea-bottom effect; Radiative transfer modeling; MODTRAN; 2SeaColour
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Professur Klimatologie > Professur Klimatologie - Univ.-Prof. Dr. Cyrus Samimi
Forschungseinrichtungen > Sonderforschungsbereiche, Forschergruppen > EXC 2052 - Africa Multiple: Afrikastudien neu gestalten
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Professur Klimatologie
Forschungseinrichtungen
Forschungseinrichtungen > Sonderforschungsbereiche, Forschergruppen
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 300 Sozialwissenschaften > 310 Statistiken
500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
Eingestellt am: 11 Jul 2022 06:55
Letzte Änderung: 01 Aug 2023 13:26
URI: https://eref.uni-bayreuth.de/id/eprint/70500