Historical reconstruction of the Atlantic Meridional Overturning Circulation from the ECMWF operational ocean reanalysis

Abstract : A reconstruction of the Atlantic Meridional Overturning Circulation (MOC) for theperiod 1959-2006 has been derived from the ECMWF operational ocean reanalysis. The reconstruction shows a wide range of time-variability, including a downward trend. At 26N, both the MOC intensity and changes in its vertical structure are in good agreement with previous estimates based on trans-Atlantic surveys. At 50N, the MOC and strength of the subpolar gyre are correlated at interannual time scales, but show opposite secular trends. Heat transport variability is highly correlated with the MOC but shows a smaller trend due to the warming of the upper ocean, which partially compensates for the weakening of the circulation. Results from sensitivity experiments show that although the time-varying upper boundary forcing provides useful MOC information, the sequential assimilation of ocean data further improves the MOC estimation by increasing both the mean and the time variability.
Type de document :
Article dans une revue
Geophysical Research Letters, American Geophysical Union, 2007, 34 (23), pp.L23615. 〈10.1029/2007GL031645〉
Liste complète des métadonnées

Littérature citée [14 références]  Voir  Masquer  Télécharger

https://hal.inria.fr/inria-00181739
Contributeur : Arthur Vidard <>
Soumis le : mercredi 24 octobre 2007 - 13:40:53
Dernière modification le : jeudi 11 janvier 2018 - 06:21:50
Document(s) archivé(s) le : lundi 24 septembre 2012 - 14:31:08

Fichier

GRL_MOC_submit3.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Magdalena Balmaseda, Gregory Smith, Keith Haines, David Anderson, Tim Palmer, et al.. Historical reconstruction of the Atlantic Meridional Overturning Circulation from the ECMWF operational ocean reanalysis. Geophysical Research Letters, American Geophysical Union, 2007, 34 (23), pp.L23615. 〈10.1029/2007GL031645〉. 〈inria-00181739〉

Partager

Métriques

Consultations de la notice

396

Téléchargements de fichiers

221