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	Provedor de dados ArchiMer (3) Boletín de Investigaciones (1) Autor Arzel, Olivier (1) Colin De Verdiere, Alain (1) Danioux, Eric (1) Holland,David M. (1) Jackson, Laura C. (1) Johnson, Helen L. (1) Lique, Camille (1) Macgilchrist, Graeme A. (1) Marshall, David P. (1) Mojica,Jhon F. (1) Monroy,Julio (1) Thomas, Matthew (1) Wood, Richard A. (1) Mais... Palavra-chave Diapycnal mixing (4) Ocean circulation (2) Antarctic Ocean dynamics (1) Atmosphere-ocean interaction (1) Boundary currents (1) Circulation thermohaline (1) Eddies (1) General circulation models (1) Gerlache Strait (1) Inertial waves (1) Lagrangian circulation/transport (1) Meridional overturning circulation (1) Mixing (1) Mixing. (1) Mélange diapycnal (1) North Atlantic Ocean (1) Ondes inertielles (1) Potential vorticity (1) Resonance (1) Résonance (1) Mais... Tipo do documento Text (3) Info:eu-repo/semantics/article (1) Ano 2021 (1) 2020 (1) 2016 (1) 2007 (1) País France (3) Colombia (1) Idioma Inglês (3) Francês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Submeso-scale Mixing Features in the Gerlache Strait Bays (Antarctica) Boletín de Investigaciones Mojica,Jhon F.; Holland,David M.; Monroy,Julio. ABSTRACT Measurements of turbulence in the ocean are sparse, especially in environments such as Antarctica. Here we map the spatial distribution of diapycnal diffusivities and the water column characteristics across the three main bays in the Gerlache Strait on the western side of the Antarctic Peninsula. The measurements were recorded during the Fifth Colombian Antarctic Expedition, 2018-2019, using a Vertical Microstructure Profiler in free fall for the first 400 m depth, to record fluctuations of vertical shear at dissipation scales (10 -3 - 10 3 m). Diapycnal diffusivities are higher by 1-2 orders of magnitude in the Gerlache mainstream compared with the interior bays, with values from O (log 10kρ= -3 m2s-1) to O (log 10kρ= -5 m2s-1) respectively... Tipo: Info:eu-repo/semantics/article Palavras-chave: Sea ice; Antarctic Ocean dynamics; Diapycnal mixing; Gerlache Strait; Mixing.. Ano: 2021 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000300041 Propagation 3D d'ondes inertielles au sein d'un champ turbulent mésoéchelle ArchiMer Danioux, Eric. A current problem in physical oceanography is to identify the sources of energy at the origin of the abyssal mixing associated with thermohaline circulation. An important source is the inertial waves generated by wind. However, the mechanisms driving this energy from the surface to the deep mixing remain poorly understood. We study here the tridimensional propagation of inertial waves in a fully turbulent mesoscale eddy field with a primitive equations numerical model. After presenting a review of works to date, we describe various methods for extracting the inertial signal. The 3D propagation of inertial waves is then described and rationalized. In particular, two dramatic maxima of the vertical velocity have been found around 100 m and 1700 m. The deep... Tipo: Text Palavras-chave: Potential vorticity; Diapycnal mixing; Thermohaline circulation; Resonance; Inertial waves; Vorticité potentielle; Mélange diapycnal; Circulation thermohaline; Résonance; Ondes inertielles. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/these-4933.pdf Locations and mechanisms of ocean ventilation in the high-latitude North Atlantic in an eddy-permitting ocean model ArchiMer Macgilchrist, Graeme A.; Johnson, Helen L.; Marshall, David P.; Lique, Camille; Thomas, Matthew; Jackson, Laura C.; Wood, Richard A.. A substantial fraction of the deep ocean is ventilated in the high-latitude North Atlantic. Consequently, the region plays a crucial role in transient climate change through the uptake of carbon dioxide and heat. However, owing to the Lagrangian nature of the process, many aspects of deep Atlantic Ocean ventilation and its representation in climate simulations remain obscure. We investigate the nature of ventilation in the high latitude North Atlantic in an eddy-permitting numerical ocean circulation model using a comprehensive set of Lagrangian trajectory experiments. Backwards-in-time trajectories from a model-defined ‘North Atlantic DeepWater’ (NADW) reveal the locations of subduction from the surface mixed layer at high spatial resolution. The major... Tipo: Text Palavras-chave: North Atlantic Ocean; Atmosphere-ocean interaction; Lagrangian circulation/transport; Ocean circulation; Boundary currents; Diapycnal mixing. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00646/75833/76825.pdf Can We Infer Diapycnal Mixing Rates from the World Ocean Temperature-Salinity Distribution? ArchiMer Arzel, Olivier; Colin De Verdiere, Alain. The turbulent diapycnal mixing in the ocean is currently obtained from microstructure and finestructure measurements, dye experiments, and inverse models. This study presents a new method that infers the diapycnal mixing from low-resolution numerical calculations of the World Ocean whose temperatures and salinities are restored to the climatology. At the difference of robust general circulation ocean models, diapycnal diffusion is not prescribed but inferred. At steady state the buoyancy equation shows an equilibrium between the large-scale diapycnal advection and the restoring terms that take the place of the divergence of eddy buoyancy fluxes. The geography of the diapycnal flow reveals a strong regional variability of water mass transformations.... Tipo: Text Palavras-chave: Diapycnal mixing; Eddies; Meridional overturning circulation; Mixing; Ocean circulation; General circulation models. Ano: 2016 URL: https://archimer.ifremer.fr/doc/00600/71197/69563.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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