YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • AMS
    • Journal of Physical Oceanography
    • View Item
    •   YE&T Library
    • AMS
    • Journal of Physical Oceanography
    • View Item
    • All Fields
    • Source Title
    • Year
    • Publisher
    • Title
    • Subject
    • Author
    • DOI
    • ISBN
    Advanced Search
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Archive

    Mechanisms of Interannual Variations of the Meridional Overturning Circulation of the North Atlantic Ocean

    Source: Journal of Physical Oceanography:;2008:;Volume( 038 ):;issue: 002::page 467
    Author:
    Cabanes, Cécile
    ,
    Lee, Tong
    ,
    Fu, Lee-Lueng
    DOI: 10.1175/2007JPO3726.1
    Publisher: American Meteorological Society
    Abstract: The authors investigate the nature of the interannual variability of the meridional overturning circulation (MOC) of the North Atlantic Ocean using an Estimating the Circulation and Climate of the Ocean (ECCO) assimilation product for the period of 1993?2003. The time series of the first empirical orthogonal function of the MOC is found to be correlated with the North Atlantic Oscillation (NAO) index, while the associated circulation anomalies correspond to cells extending over the full ocean depth. Model sensitivity experiments suggest that the wind is responsible for most of this interannual variability, at least south of 40°N. A dynamical decomposition of the meridional streamfunction allows a further look into the mechanisms. In particular, the contributions associated with 1) the Ekman flow and its depth-independent compensation, 2) the vertical shear flow, and 3) the barotropic gyre flowing over zonally varying topography are examined. Ekman processes are found to dominate the shorter time scales (1.5?3 yr), while for longer time scales (3?10 yr) the MOC variations associated with vertical shear flow are of greater importance. The latter is primarily caused by heaving of the pycnocline in the western subtropics associated with the stronger wind forcing. Finally, how these changes in the MOC affect the meridional heat transport (MHT) is examined. It is found that overall, Ekman processes explain a larger part of interannual variability (3?10 yr) for MHT (57%) than for the MOC (33%).
    • Download: (1.566Mb)
    • Show Full MetaData Hide Full MetaData
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      Mechanisms of Interannual Variations of the Meridional Overturning Circulation of the North Atlantic Ocean

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4207299
    Collections
    • Journal of Physical Oceanography

    Show full item record

    contributor authorCabanes, Cécile
    contributor authorLee, Tong
    contributor authorFu, Lee-Lueng
    date accessioned2017-06-09T16:20:15Z
    date available2017-06-09T16:20:15Z
    date copyright2008/02/01
    date issued2008
    identifier issn0022-3670
    identifier otherams-66010.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4207299
    description abstractThe authors investigate the nature of the interannual variability of the meridional overturning circulation (MOC) of the North Atlantic Ocean using an Estimating the Circulation and Climate of the Ocean (ECCO) assimilation product for the period of 1993?2003. The time series of the first empirical orthogonal function of the MOC is found to be correlated with the North Atlantic Oscillation (NAO) index, while the associated circulation anomalies correspond to cells extending over the full ocean depth. Model sensitivity experiments suggest that the wind is responsible for most of this interannual variability, at least south of 40°N. A dynamical decomposition of the meridional streamfunction allows a further look into the mechanisms. In particular, the contributions associated with 1) the Ekman flow and its depth-independent compensation, 2) the vertical shear flow, and 3) the barotropic gyre flowing over zonally varying topography are examined. Ekman processes are found to dominate the shorter time scales (1.5?3 yr), while for longer time scales (3?10 yr) the MOC variations associated with vertical shear flow are of greater importance. The latter is primarily caused by heaving of the pycnocline in the western subtropics associated with the stronger wind forcing. Finally, how these changes in the MOC affect the meridional heat transport (MHT) is examined. It is found that overall, Ekman processes explain a larger part of interannual variability (3?10 yr) for MHT (57%) than for the MOC (33%).
    publisherAmerican Meteorological Society
    titleMechanisms of Interannual Variations of the Meridional Overturning Circulation of the North Atlantic Ocean
    typeJournal Paper
    journal volume38
    journal issue2
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/2007JPO3726.1
    journal fristpage467
    journal lastpage480
    treeJournal of Physical Oceanography:;2008:;Volume( 038 ):;issue: 002
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian