Concentration of floating biogenic material in convergence zones - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Journal of Marine Systems Année : 2007

Concentration of floating biogenic material in convergence zones

Résumé

Some organisms that live just below the sea surface (the neuston) are known more as a matter of curiosity than as critical players in biogeochemical cycles. The hypothesis of this work is that their existence implies that they receive some food from an upward flux of organic matter. The behaviour of these organisms and of the associated organic matter, hereafter mentioned as floating biogenic material (FBM) is explored using a global physical-biogeochemical coupled model, in which its generation is fixed to 1% of primary production, and decay rate is of the order of 1 month. The model shows that the distribution of FBM should depart rapidly from that of primary production, and be more sensitive to circulation patterns than to the distribution of primary production. It is trapped in convergence areas, where it reaches concentrations larger by a factor 10 than in divergences, thus enhancing and inverting the contrast between high and low primary productivity areas. Attention is called on the need to better understand the biogeochemical processes in the first meter of the ocean, as they may impact the distribution of food for fishes, as well as the conditions for air-sea exchange and for the interpretation of sea color.
Fichier principal
Vignette du fichier
yd_JMS_spissue_pourpdf.pdf (511.54 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00193692 , version 1 (04-12-2007)

Identifiants

Citer

Yves Dandonneau, Christophe E. Menkès, Olaf Duteil, Thomas Gorgues. Concentration of floating biogenic material in convergence zones. Journal of Marine Systems, 2007, 69, pp.226-232. ⟨10.1016/j.jmarsys.2006.02.016⟩. ⟨hal-00193692⟩
713 Consultations
227 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More