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	Provedor de dados ArchiMer (5) Autor Feucher, Charlene (2) Allan, R. P. (1) Barton, Benjamin I. (1) Desbruyeres, Damien (1) Fablet, Ronan (1) Hamon, Mathieu (1) Hyder, P. (1) Le Goff, Clement (1) Lenca, Philippe (1) Lenn, Yueng‐djern (1) Lique, Camille (1) Liu, C. (1) Maze, Guillaume (1) Mercier, Herle (1) Palmer, M. D. (1) Radcenco, Manuel Lopez (1) Roberts, C. D. (1) Smith, D. (1) Tandeo, Pierre (1) Mais... Palavra-chave Heat content (5) Argo (2) Freshwater content (2) Stratification (2) Arctic Ocean (1) Atlantique nor (1) Biais XBT (1) Classification North Atlantic (1) Contenu de chaleur (1) Contenu d’eau douce (1) Contenu thermique (1) Decadal variability (1) Field reconstruction (1) Global warming (1) Gyres subtropicaux (1) Heat budget (1) Heat transports (1) In situ measurement (1) Interannual (1) North Atlantic. (1) Mais... Tipo do documento Text (5) Ano 2020 (1) 2017 (2) 2016 (1) 2012 (1) País France (5) Idioma Inglês (4) Francês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Coherent heat patterns revealed by unsupervised classification of Argo temperature profiles in the North Atlantic Ocean ArchiMer Maze, Guillaume; Mercier, Herle; Fablet, Ronan; Tandeo, Pierre; Radcenco, Manuel Lopez; Lenca, Philippe; Feucher, Charlene; Le Goff, Clement. A quantitative understanding of the integrated ocean heat content depends on our ability to determine how heat is distributed in the ocean and what are the associated coherent patterns. This study demonstrates how this can be achieved using unsupervised classification of Argo temperature profiles. The classification method used is a Gaussian Mixture Model (GMM) that decomposes the Probability Density Function of a dataset into a weighted sum of Gaussian modes. It is determined that the North Atlantic Argo dataset of temperature profiles con- tains 8 groups of vertically coherent heat patterns, or classes. Each of the temperature profile classes reveals unique and physically coherent heat distributions along the vertical axis. A key result of this study is... Tipo: Text Palavras-chave: Heat content; Classification North Atlantic; Stratification; Water mass; Thermocline; Argo; Pattern. Ano: 2017 URL: http://archimer.ifremer.fr/doc/00363/47431/47456.pdf Caractérisation des effets du réchauffement climatique sur l'océan superficiel au cours des 50 dernières années ArchiMer Hamon, Mathieu. To identify and characterize the effects of global warming is one of the major scientific challenges of this new century. The rise of sea level, the hydrological changes are some consequences of this phenomenon which will influence all forms of life on Earth. Due to its high thermal capacity, it is estimated that 84% of the energy developed by global warming is stored in the first layers of the ocean. However, it is rather difficult to assess its overall impact over the last 50 years because the ocean is not warming uniformly and the inhomogeneous sampling (spatial and temporal) of oceanographic observations, instrumental errors (XBT) and biases related to the estimation process of global indicators can affect our assessment of the evolution of ocean... Tipo: Text Palavras-chave: Réchauffement climatique; Observations in situ; Biais XBT; Reconstruction de champs; Contenu thermique; Contenu d’eau douce; Global warming; In situ measurement; XBT bias; Field reconstruction; Heat content; Freshwater content. Ano: 2012 URL: https://archimer.ifremer.fr/doc/00498/60957/64360.pdf Surface flux and ocean heat transport convergence contributions to seasonal and interannual variations of ocean heat content ArchiMer Roberts, C. D.; Palmer, M. D.; Allan, R. P.; Desbruyeres, Damien; Hyder, P.; Liu, C.; Smith, D.. We present an observation-based heat budget analysis for seasonal and interannual variations of ocean heat content (H) in the mixed layer (H-mld) and full-depth ocean (H-tot). Surface heat flux and ocean heat content estimates are combined using a novel Kalman smoother-based method. Regional contributions from ocean heat transport convergences are inferred as a residual and the dominant drivers of H-mld and H-tot are quantified for seasonal and interannual time scales. We find that non-Ekman ocean heat transport processes dominate H-mld variations in the equatorial oceans and regions of strong ocean currents and substantial eddy activity. In these locations, surface temperature anomalies generated by ocean dynamics result in turbulent flux anomalies that... Tipo: Text Palavras-chave: Heat content; Heat transports; Interannual; Surface fluxes; Variability; Heat budget. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00387/49813/50388.pdf Stratification structure in subtropical gyres and its decadal variability in the North Atlantic Ocean ArchiMer Feucher, Charlene. Subtropical gyres are central to the observed climate changes throughout the last decades. It is observed between the surface and the permanent pycnocline an intense increase in the ocean heat content. The permanent pycnocline delineates thus an important heat reservoir. The permanent pycnocline has a major role in preventing heat to reach the deep ocean and it thus of a relative importance in the context of climate change. For the first time and thanks to the development of the Argo array, we have been able to characterize the observed structure of the permanent pycnocline. The objective of this PhD thesis is to investigate the structure of the permanent pycnocline and its variability over the last decades. We developed an objective method to characterize... Tipo: Text Palavras-chave: Pycnocline permanente; Stratification; Contenu de chaleur; Variabilité décennale; Argo; Réanalyses océaniques; Gyres subtropicaux; Atlantique nor; Permanent pycnocline; Stratification; Heat content; Decadal variability; Argo; Ocean reanalyses; Subtropical gyres; North Atlantic.. Ano: 2016 URL: http://archimer.ifremer.fr/doc/00366/47675/47721.pdf Water mass properties derived from satellite observations in the Barents Sea ArchiMer Barton, Benjamin I.; Lique, Camille; Lenn, Yueng‐djern. The Barents Sea is a region of deep water formation where Atlantic Water is converted into cooler, fresher Barents Sea Water. Barents Sea Water properties exhibit variability at seasonal, interannual and decadal timescales. This variability is transferred to Arctic Intermediate Water, which eventually contributes to the deeper branch of the Atlantic Meridional Overturning Circulation. Variations in Barents Sea Water properties are reflected in steric height (contribution of density to sea level variations) that depends on heat and freshwater content, and is a quantity usually derived from in situ observations of water temperature, salinity and pressure that remain sparse during winter in the Barents Sea. This analysis explores the utility of satellite... Tipo: Text Palavras-chave: Satellite; Steric height; Freshwater content; Heat content; Arctic Ocean. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00634/74651/74556.pdf Registros recuperados: 5 Primeira ... 1 ... Última

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