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AuthorAl-Naimi, Noora
AuthorE. Raitsos, Dionysios
AuthorBen-Hamadou, Radhouan
AuthorSoliman, Yousria
Available date2017-05-07T05:43:53Z
Publication Date2017-03-15
Publication Nameremote sensingen_US
Identifierhttp://dx.doi.org/10.3390/rs9030301
CitationAl-Naimi, N.; Raitsos, D.E.; Ben-Hamadou, R.; Soliman, Y. Evaluation of Satellite Retrievals of Chlorophyll-a in the Arabian Gulf. Remote Sens. 2017, 9, 301.
ISSN2072-4292
URIhttp://hdl.handle.net/10576/5479
AbstractThe Arabian Gulf is a highly turbid, shallow sedimentary basin whose coastal areas have been classified as optically complex Case II waters (where ocean colour sensors have been proved to be unreliable). Yet, there is no such study assessing the performance and quality of satellite ocean-colour datasets in relation to ground truth data in the Gulf. Here, using a unique set of in situ Chlorophyll-a measurements (Chl-a; an index of phytoplankton biomass), collected from 24 locations in four transects in the central Gulf over six recent research cruises (2015–2016), we evaluated the performance of VIIRS and other merged satellite datasets, for the first time in the region. A highly significant relationship was found (r = 0.795, p < 0.001), though a clear overestimation in satellite-derived Chl-a concentrations is evident. Regardless of this constant overestimation, the remotely sensed Chl-a observations illustrated adequately the seasonal cycles. Due to the optically complex environment, the first optical depth was calculated to be on average 6–10 m depth, and thus the satellite signal is not capturing the deep chlorophyll maximum (DCM at ~25 m). Overall, the ocean colour sensors’ performance was comparable to other Case II waters in other regions, supporting the use of satellite ocean colour in the Gulf. Yet, the development of a regional-tuned algorithm is needed to account for the unique environmental conditions of the Gulf, and ultimately provide a better estimation of surface Chl-a in the region.
Languageen
PublisherMDPI
SubjectRemote Sensing
SubjectSatellite
SubjectChlorophyll-a
SubjectArabian Gulf
Subjectenvironmental
Subjectocean
Subjectphytoplankton
Subjectocean colour
Subjectremote sensing
SubjectOC-CCI
TitleEvaluation of Satellite Retrievals of Chlorophyll-a in the Arabian Gulf
TypeArticle
Issue Number3
Volume Number9
dc.identifier.essn 2072-4292


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