Historical reconstruction of the Atlantic Meridional Overturning Circulation from the ECMWF operational ocean reanalysis - MOISE Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2007

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

Résumé

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.
Fichier principal
Vignette du fichier
GRL_MOC_submit3.pdf (584.59 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

inria-00181739 , version 1 (24-10-2007)

Identifiants

Citer

Magdalena Balmaseda, Gregory Smith, Keith Haines, David P. Anderson, Tim Palmer, et al.. Historical reconstruction of the Atlantic Meridional Overturning Circulation from the ECMWF operational ocean reanalysis. Geophysical Research Letters, 2007, 34 (23), pp.L23615. ⟨10.1029/2007GL031645⟩. ⟨inria-00181739⟩
230 Consultations
565 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More