Influence des ondes de Rossby sur le système biogéochimique de l'Océan Atlantique Nord: Utilisation des données satellites couleur de l'eau et d'un modèle couplé physique/biogéochimie

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Contributeur(s) Université Paul Sabatier, Toulouse III
Identifiant documentaire 9-2454
Identifiant OAI oai:archimer.ifremer.fr:2454
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Auteur(s): Charria, Guillaume
Mots clés coupled physical/biogeochemical modelling multi sensor wavelet analysis ocean carbon cycle North Atlantic Ocean primary production ocean colour altimetry Rossby (or planetary) waves planetary waves coupled physical/biogeochemical oceanography modélisaiton couplée physique/biogéochimie analyse en ondelettes multi capteurs cycle océanique du carbone océan Atlantique Nord production primaire couleur de l'eau altimétrie ondes de Rossby ou planétaires océanographie couplée physique/biogéochimie
Date de publication 14/12/2005
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Droits de réutilisation info:eu-repo/semantics/openAccess

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The marine phytoplankton in the ocean represents only less than 1% of global biomass. Phytoplankton performs half of all photosynthesis. This autotrophic biomass in ocean is then an essential element in the climate regulation through processes as carbon dioxide absorption during the photosynthesis. Therefore, we need to estimate precisely this biomass as well as the processes which affect it. Using remotely sensed data (altimetry and ocean colour) and a coupled physical/biogeochemical model (MERCATOR-OPA/NPZDDON), Rossby waves and their influence on phytoplankton biomass are specifically studied in the North Atlantic Ocean. Their features and their influences on surface chlorophyll concentrations were analysed. Through the different mechanisms identified, we estimated that these waves can induce local increases from 60% to 150% of the estimated primary production.

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