Bio-optical properties of coastal waters in the Eastern English Channel

Vantrepotte, Vincent; Brunet, Christophe; Mériaux, Xavier; Lécuyer, Eric; Vellucci, Vincenzo; Santer, Richard

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1016/j.ecss.2006.10.016

Title :

Bio-optical properties of coastal waters in the Eastern English Channel

Author(s) :

Vantrepotte, Vincent [Auteur]

Brunet, Christophe [Auteur]
Mériaux, Xavier [Auteur]
Lécuyer, Eric [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Centre National de la Recherche Scientifique [CNRS]
Vellucci, Vincenzo [Auteur]
Santer, Richard [Auteur]

Journal title :

Estuarine, Coastal and Shelf Science

Pages :

201-212

Publication date :

2007

HAL domain(s) :

Planète et Univers [physics]

English abstract : [en]

Strong tidal currents, shallow water and numerous freshwater inputs characterize the coastal waters of the eastern English Channel. These case 2 waters were investigated through an intensive sampling effort in 2000 aiming ...
Show more >Strong tidal currents, shallow water and numerous freshwater inputs characterize the coastal waters of the eastern English Channel. These case 2 waters were investigated through an intensive sampling effort in 2000 aiming to study the distribution and variability of the Chromophoric Dissolved Organic Matter (CDOM), Non-Algal Particles (NAP) and phytoplankton absorption at the mesoscale. Four cruises were carried out in February, March, May and July and more than 80 stations each cruise were sampled for hydrographical, chemical and bio-optical analyses. Results showed two distinct situations, the winter period characterized by the strong dominance of CDOM absorption over the particulate matter, and the spring-summer period when phytoplankton and CDOM represented the same contribution. Meteorology was the main factor driving the bio-optical properties of the water column in winter whereas in spring-summer the biological activity seemed to be the more active driving force. The algal community composition in term of dominant cell size and, therefore pigment packaging, is the main factor driving the phytoplankton specific absorption in the water column. Photoprotective pigments did not significantly influence algal absorption, due to turbid and highly mixed water masses. This feature also explained the bio-optical homogeneity found along the water column. On the mesoscale, distinct bio-optical provinces were defined in relation with the observed bio-hydrographical variability.Show less >

Language :

Anglais

Popular science :

Non

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