| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
The relationship between Suspended Particulate Matter and Turbidity at a mooring station in a coastal environment: consequences for satellite-derived products
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| Autores: |
Jafar-sidik, Madihah
Gohin, Francis
Bowers, David
Howarth, John
Hull, Tom
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| Data: |
2017-07
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| Ano: |
2017
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| Palavras-chave: |
Turbidity
Suspended matter
MODIS
Irish Sea
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| 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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| 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/
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| Editor: |
Polish Acad Sciences Inst Oceanology
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| Formato: |
application/pdf
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| Fonte: |
Oceanologia (0078-3234) (Polish Acad Sciences Inst Oceanology), 2017-07 , Vol. 59 , N. 3 , P. 365-378
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| Direitos: |
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
restricted use
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