Data/hora: 13/06/2024 04:00:13

Provedor de dados: | 5
País: | France
Título: | Estimations satellitales de la couleur de l'eau lagonaire à l'aide des produits Sentinel-2
Autores: | Rintz, Cam Ly.
Data: | 2020
Ano: | 2020
Palavras-chave: | Couleur de l’eau; Turbidité; Satellite; Télédétection; Réflectance; Lagon; Nouvelle-Calédonie; Sentinel-2.
Resumo: | The lagoon of New Caledonia is subject to various pressures, including terrigenous stream inputs. Their evolution – extent, intensity – can be studied through parameters such as ocean color, depending on turbidity or phytoplankton concentration. Satellite imagery is more and more used for this purpose. As the Sentinel-2 (S2) mission, with its satellites providing ten meters-resolution images, has been recently launched, we worked on the characterisation of lagoon color using these products. After testing the performance of existing algorithms for New Caledonia, initially applied to satellites other than S2, we tried to establish a new turbidity algorithm based on field data (measures in the South-West lagoon of New Caledonia and the lagoon near Koumac in North Province). The best result is obtained with a three-bands algorithm, a third-degree polynomial which gives turbidity given the water reflectance (combination of reflectances Rrs492.Rrs665/Rrs443). Through this work, we got very satisfying and promising results, which offer the prospect of improvements such as refining our understanding of the observed bias and completing the data base in order to build a more robust algorithm.
Tipo: | Text
Idioma: | Francês

Identificador:

https://archimer.ifremer.fr/doc/00645/75752/76712.pdf

https://archimer.ifremer.fr/doc/00645/75752/

Formato: | application/pdf

Fonte:

info:eu-repo/semantics/openAccess

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