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Specific phytoplankton absorption variability and implication for chlorophyll a retrieval in Belgian waters (Southern North Sea)
Astoreca, R.; Rousseau, V.; Lancelot, C. (2006). Specific phytoplankton absorption variability and implication for chlorophyll a retrieval in Belgian waters (Southern North Sea), in: Danesy, D. (Ed.) Proceedings of the Second Working Meeting on MERIS and AATSR Calibration and Geophysical Validation (MAVT-2006). 20-24 March 2006, ESRIN, Frascati (Italy). ESA Special Publications, 615: pp. 1-5
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Document type: Conference paper
Keywords
    Aquatic communities > Plankton > Phytoplankton
    Organic compounds > Carbohydrates > Glycosides > Pigments > Photosynthetic pigments > Chlorophylls
    Remote sensing
    Spectra > Absorption spectra
    ANE, Belgium, Belgian Coast [Marine Regions]; ANE, Belgium, Belgian Continental Shelf (BCS) [Marine Regions]
    Marine/Coastal
Project Top | Authors 
  • BELCOLOUR - Optical remote sensing of coastal waters
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Abstract
    Chlorophyll a retrieval from satellite is based on algorithms that convert the phytoplankton absorption into chlorophyll a by means of the specific- phytoplankton absorption. This factor has been found to be highly variable, spatially and seasonally. The variability of the chlorophyll a-specific phytoplankton absorption in Belgian waters (Southern North Sea) was investigated to determine how it is affecting the chlorophyll a retrieval from satellite information. The Southern Bight of the North Sea is a very dynamic area influenced by river discharges and characterised by highly variable chlorophyll, suspended matter and coloured dissolved organic matter absorption. The impact of using a mean value of specific-phytoplankton absorption as usually done instead of the real one in chlorophyll a retrieval was estimated and found to be significant (underestimation up to 70% at 665 nm).
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