par Astoreca, Rosa ;Rousseau, Véronique ;Lancelot, Christiane
Référence Ocean Optics XIX(6-10 October 2008: Barga, Italy), Proceedings of the XIX Ocean Optics Conference, 2008, Il Ciocco, Barga, Italy
Publication Publié, 2008
Publication dans des actes
Résumé : Analysis of a large dataset of Coloured Dissolved Organic Matter (CDOM) spectra measured in estuarine (Scheldt) and coastal marine Belgian waters during different seasons was analysed based on the slope of the CDOM absorption spectra (S) and the CDOM absorption at 442 nm, aCDOM(442), reflecting the origin and concentration of the CDOM, respectively. A larger variability of S was revealed in marine than in estuarine waters. Different relationships between S and aCDOM(442) were evidenced for offshore marine, coastal marine and estuarine waters. The possible role of phytoplankton and derived matter in this variability was explored by comparing S and aCDOM(442) at three different stages of the phytoplankton bloom development, i.e., growth, decay and post-bloom. Lower S coupled to higher aCDOM(442) values found during the post-bloom stage compared to the growing and decaying phases, suggesting the post-bloom production of autochthonous CDOM.