Data/hora: 09/06/2024 14:47:36

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | The relationship between Suspended Particulate Matter and Turbidity at a mooring station in a coastal environment: consequences for satellite-derived products
Autores: | Jafar-sidik, Madihah; Gohin, Francis; Bowers, David; Howarth, John; Hull, Tom.
Data: | 2017-07
Ano: | 2017
Palavras-chave: | Turbidity; Suspended matter; MODIS; Irish Sea.
Resumo: | From a data set of observations of Suspended Particulate Matter (SPM) concentration, Turbidity in Formazin Turbity Unit (FTU) and fluorescence-derived chlorophyll-a at a mooring station in Liverpool Bay, in the Irish Sea, we investigate the seasonal variation of the SPM:Turbidity ratio. This ratio changes from a value of around 1 in winter (minimum in January–February) to 2 in summer (maximum in May–June). This seasonal change can be understood in terms of the cycle of turbulence and of the phytoplankton population that affects the nature, shape and size of the particles responsible for the Turbidity. The data suggest a direct effect of phytoplankton on the SPM:Turbidity ratio during the spring bloom occurring in April and May and a delayed effect, likely due to aggregation of particles, in July and August. Based on the hypothesis that only SPM concentration varies, but not the mass-specific backscattering coefficient of particles bbp*, semi-analytical algorithms aiming at retrieving SPM from satellite radiance ignore the seasonal variability of bbp* which is likely to be inversely correlated to the SPM:Turbidity ratio. A simple sinusoidal modulation of the relationship between Turbidity and SPM with time helps to correct this effect at the location of the mooring. Without applying a seasonal modulation to bbp*, there is an underestimation of SPM in summer by the Ifremer semi-analytical algorithm (Gohin et al., 2015) we tested despite the good relationship observed between the backscattering coefficient and Turbidity.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00383/49473/49960.pdf

DOI:10.1016/j.oceano.2017.04.003

http://archimer.ifremer.fr/doc/00383/49473/

Editor: | Polish Acad Sciences Inst Oceanology
Formato: | application/pdf
Fonte: | Oceanologia (0078-3234) (Polish Acad Sciences Inst Oceanology), 2017-07 , Vol. 59 , N. 3 , P. 365-378

Fonte:

2017 Institute of Oceanology of the Polish Academy of Sciences. Production and hosting by Elsevier Sp. z o.o. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

info:eu-repo/semantics/openAccess

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