Towards a better assessment of the ecological status of coastal waters using satellite-derived chlorophyll-a concentrations

REMOTE SENSING OF ENVIRONMENT

卷:112

Article

Gohin, Francis¹  Saulquin, Bertrand¹  Oger-Jeanneret, Helene²  Lozac'h, Loic³  Lampert, Luis⁴  Lefebvre, Alain⁵  Riou, Philippe⁴  Bruchon, Franck⁶ 

[1] IFREMER, F-29280 Plouzane, Brittany, France

[2] IFREMER, F-44311 Nantes, Brittany, France

[3] HOCER, F-29540 Guipaves, Brittany, France

[4] IFREMER, F-14520 Port En Bessin, France

[5] Ifremer Boulogne, F-62321 Boulogne Sur Mer, France

[6] Agcy Eau Seine Normandie Delegat Littoral & Mer, F-14600 Honfleur, France

关键词: satellite;    chlorophyll;    monitoring;    surveillance;    coastal;    SeaWiFS;   

DOI  :  10.1016/j.rse.2008.02.014

来源: Elsevier

【 摘 要 】

The application of the new Water Framework Directive (WFD) of the European Union will require a dense and frequent monitoring of chlorophyll-a near the coast. Not counting the transitional water bodies located in the vicinity of estuaries, not less than seventy four coastal water bodies have to be monitored along the coast of the French Atlantic continental shelf and the English Channel. All the available data have to be gathered to implement a comprehensive monitoring scheme. To this purpose, we evaluate the capacity of ocean colour imagery to complete the conventional in situ data set collected in coastal networks. Satellite-derived chlorophyll-a concentration is obtained by the application of a coastal Look-Up-Table to water-leaving radiance of the Sea-viewing Wide Field Instrument Sensor (SeaWiFS) for the 1998-2004 period. Seven years of satellite-derived and in situ chlorophyll-a concentrations are compared at seven representative stations of different water bodies. These comparisons show that the satellite products are reliable in most of the situations studied and throughout the seasons. Then the satellite imagery is used to classify the coastal waters following the eutrophication risk criterion of the WFD. This classification is made according to the percentile-90 of chlorophyll-a calculated during the productive season, from March to October. Despite a lack of sensor coverage over a small fraction of the near shore waters, this work shows that the satellite monitoring can considerably ease the application of the WFD. (C) 2008 Elsevier Inc. All Fights reserved.

【 授权许可】

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