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Remote Sensing of Water Constituent Concentrations Using Time Series of In-situ Hyperspectral Measurements in the Wadden Sea

Title data

Arabi, Behnaz ; Salama, Mhd. Suhyb ; Wernand, Marcel R. ; Verhoef, Wouter:
Remote Sensing of Water Constituent Concentrations Using Time Series of In-situ Hyperspectral Measurements in the Wadden Sea.
In: Remote Sensing of Environment. Vol. 216 (2018) . - pp. 154-170.
ISSN 0034-4257
DOI: https://doi.org/10.1016/j.rse.2018.06.040

Official URL: Volltext

Abstract in another language

This study aimed to investigate the capability of the two-stream radiative transfer model 2SeaColor for the simultaneous retrieval of Chlorophyll-a (Chla), Suspended Particulate Matter (SPM) and Colored Dissolved Organic Matter (CDOM) concentrations from remote sensing measurements under various conditions (i.e., solar zenith angle values (SZAs) and water turbidity levels). For this evaluation, a time series of diurnal in-situ hyperspectral measurements of remote sensing reflectance (Rrs) concurrent with in-situ measured Chla and SPM concentrations between 2008 and 2010 by the NIOZ jetty station (the NJS), located in the Dutch part of the Wadden Sea, was used. Validation of the model retrievals against in-situ measurements showed an acceptable accuracy (Chla: R2 = 0.80 and RMSE = 2.98 [mg m−3]; SPM: R2 = 0.89 and RMSE = 2.53 [g m−3]) with good agreement between the temporal trends of measured and retrieved concentration values over multiple years. However, the model inversion results yielded less good estimates at SZA > 60° during winter. Furthermore, the effect of the tide on the variation of daily time series of Chla and SPM concentrations was analyzed. At the particular NJS location, the tidal effects on the concentrations of SPM and Chla were found to be small. The capability of the 2SeaColor model to retrieve reliable estimates, and the favorable location of the NJS, which is little influenced by tidal phase variations, contribute to a better understanding of the long-term variability of Chla and SPM concentrations. The results of this study may support the ongoing efforts on Sentinel-3 Ocean and Land Color Instrument (OLCI) calibration and validation at the Dutch Wadden Sea.

Further data

Item Type: Article in a journal
Refereed: No
Keywords: Remote sensing; Turbid waters; The 2SeaColor model; Hyperspectral measurements; Tidal effect; Solar zenith angle; The NIOZ jetty station; The Wadden Sea
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Climatology > Professor Climatology - Univ.-Prof. Dr. Cyrus Samimi
Research Institutions > Collaborative Research Centers, Research Unit > EXC 2052 - Africa Multiple: Afrikastudien neu gestalten
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Climatology
Research Institutions
Research Institutions > Collaborative Research Centers, Research Unit
Result of work at the UBT: No
DDC Subjects: 500 Science > 550 Earth sciences, geology
Date Deposited: 11 Jul 2022 07:08
Last Modified: 01 Aug 2023 13:25
URI: https://eref.uni-bayreuth.de/id/eprint/70502