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	Provedor de dados ArchiMer (5) Autor Charria, Guillaume (1) Dencausse, Guillaume (1) Deshoux, Vincent (1) Gourcuff, Claire (1) Populus, Jacques (1) Verrier, Simon (1) Mais... Palavra-chave Altimétrie (5) Altimetry (4) 1/12° (1) 1/4° (1) 3subtropical Front (1) Agulhas Current (1) Agulhas Rings (1) Analyse (1) Analyse en ondelettes multi capteurs (1) Analysis (1) Anneaux des Aiguilles (1) Argo oat (1) Atlantique Nord (1) Bathymétrie (1) Circulation Méridienne de Retournement (MOC) (1) Couleur de l'eau (1) Coupled physical/biogeochemical modelling (1) Coupled physical/biogeochemical oceanography (1) Courant Côtier Est Groenlandais (1) Courant des Aiguilles (1) Mais... Tipo do documento Text (5) Ano 2018 (1) 2009 (1) 2008 (1) 2005 (1) 2004 (1) País France (5) Idioma Francês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Echanges indo-atlantiques d'eau subtropicale en relation aux structures frontales et de méso-échelle: Utilisation de la série temporelle altimétrique de niveau de la mer ArchiMer Dencausse, Guillaume. Indo-Atlantic exchanges of subtropical water play a crucial role in controlling global climate. The intense mesoscale activity south of Africa contributes to these exchanges, yet remains poorly described. A commonly accepted circulation scheme of those waters assmues that the subtropical gyres of the neighbouring oceans are partially connected, forming a super-gyre. Using an altimeter-derived sea-level time series spanning over 12 years, we study the exchanges through the "northern branch" of the super-gyre (Indian to Atlantic ocean), and through the "southern branch" (opposite direction). Regarding the northern branch, an initial study of the Agulhas Current Retroflection yields a statistical description of its behaviour, and shows the disrupting role of... Tipo: Text Palavras-chave: Courant des Aiguilles; Anneaux des Aiguilles; Front Subtropical; Retroflection; Altimétrie; Échanges indo-atlantiques; Mésoéchelle; Agulhas Current; Agulhas Rings; 3subtropical Front; Retroflection; Altimetry; Indo-atlantic exchanges; Mesoscale. Ano: 2009 URL: http://archimer.ifremer.fr/doc/00030/14091/11310.pdf Etude de la variabilité de la circulation du gyre subpolaire de l'Atlantique Nord à partir des données Ovide et de mesures satellitaires ArchiMer Gourcuff, Claire. The cyclonic circulation of the North Atlantic subpolar gyre, between 50°N and 63°N, plays a key role in the climate variability. The Ovide program contributes to the observation of the circulation in this region. A section is repeated every two years in summer since 2002 between Greenland and Portugal following a path close the Fourex 1997 section. To get transport estimates across the sections, a geostrophic box inverse model is used, constrained with direct current measurements. Our new estimates of Fourex transports show the need to use constraints temporally associated with the section to get transports estimates representative of the circulation at the section realisation dates. It is also shown that altimetry velocities can be used instead of ADCP... Tipo: Text Palavras-chave: Inverse Model; Courantology; Geostrophy; Altimetry; East Greenland Coastal Current; Freshwater fluxes; Heat transport; Meridionnal Overturning Circulation (MOC); Variability; North Atlantic; Subpolar gyre; Ovide; Modèle inverse; Géostrophie; Courantométrie; Altimétrie; Courant Côtier Est Groenlandais; Flux d'eau douce; Transport de chaleur; Circulation Méridienne de Retournement (MOC); Variabilité; Atlantique Nord; Gyre subpolaire; Ovide. Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/these-6226.pdf Impact des missions altimétriques et des réseaux de mesure in situ actuels et futurs sur l'analyse et la prévision océanique ArchiMer Verrier, Simon. Two series of Observing System Simulation Experiments (OSSEs) are carried out with global data assimilation systems at 1/4° and 1/12° resolution using simulated altimetry (satellite) and in situ (Argo  oat) data derived from a 1/12° resolution free run simulation. The objectives are to quantify how well di erent data sets can constrain a global data assimilation system. The positive impact of multiple altimeter data is clearly evidenced on sea level and ocean currents. The addition of Argo has a major impact to improve temperature and demonstrates the essential role of Argo together with altimetry to constrain a global data assimilation system. Results derived from these OSSEs are consistent with those derived from experiments with real data (observing... Tipo: Text Palavras-chave: Océanographie; Systèmes opérationnels; Altimétrie; Flotte Argo; OSSE; OSE; Analyse; Prévision; 1/4°; 1/12°; Oceanography; Operationnal systems; Altimetry; Argo oat; OSSE; OSE; Analysis; Forecast; 1/4°; 1/12°. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00497/60915/64272.pdf 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 ArchiMer Charria, Guillaume. 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,... Tipo: Text Palavras-chave: 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. Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-2454.pdf Nouveaux outils au service du littoral : la topographie par télémétrie laser aéroportée ArchiMer Populus, Jacques; Deshoux, Vincent. Lever la topographie de la zone côtière à l’aide de la technique du télémètre laser (Lidar) aéroporté présente de multiples avantages par rapport aux méthodes classiques : la mesure est rapide, dense et précise, autorisant la cartographie du relief de zones d’estran difficilement accessibles aux moyens classiques. L’Ifremer et la Cellule de Mesures et de Bilans ont organisé en 2002 la couverture de plusieurs sites du littoral ouest de la France. La mise en oeuvre des levés et la validation des données sont rapidement exposés, ainsi que la précision que l’on peut en attendre, sur sol nu et végétation basse. Au plan des applications, la cartographie des habitats, objet du réseau "Réseau benthique" (Rebent, aujourd’hui opérationnel en Bretagne), utilise... Tipo: Text Palavras-chave: Altimétrie; Bathymétrie; Lidar; Photogrammétrie; Littoral; Zone côtière; Marée; Modélisation hydrodynamique; MNT. Ano: 2004 URL: http://archimer.ifremer.fr/doc/00151/26251/24333.pdf Registros recuperados: 5 Primeira ... 1 ... Última

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