Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

The North Atlantic eddy heat transport and its relation with the vertical tilting of the Gulf Stream axis

Abstract : Correlations between temperature and velocity fluctuations are a significant contribution to the North Atlantic meridional heat transport, especially at the northern boundary of the subtropical gyre. In satellite observations and in a numerical model at 1/12° resolution, a localized pattern of positive eddy heat flux is found northwest of the Gulf Stream, downstream of its separation at Cape Hatteras. It is confined to the upper 500 m. A simple kinematic model of a meandering jet can explain the surface eddy flux, taking into account a spatial shift between the maximum velocity of the jet and the maximum cross-jet temperature gradient. In the Gulf Stream such a spatial shift results from the nonlinear temperature profile and the vertical tilting of the velocity profile with depth. The numerical model suggests that the meandering of the Gulf Stream could account, at least in part, for the large eddy heat transport (of order 0.3 PW) near 36°N in the North Atlantic, and for its compensation by the mean flow.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01504503
Contributeur : Françoise Pinsard <>
Soumis le : lundi 12 avril 2021 - 08:31:30
Dernière modification le : mardi 11 mai 2021 - 11:36:39

Fichier

[15200485 - Journal of Physica...
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Citation

Anne-Marie Tréguier, Camille Lique, Julie Deshayes, Jean-Marc Molines. The North Atlantic eddy heat transport and its relation with the vertical tilting of the Gulf Stream axis. Journal of Physical Oceanography, American Meteorological Society, 2017, In Honor of Bach-Lien Hua: Ocean Scale Interactions, 47 (6), pp.1281-1289. ⟨10.1175/JPO-D-16-0172.1⟩. ⟨hal-01504503⟩

Partager

Métriques

Consultations de la notice

477

Téléchargements de fichiers

84