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    Geostrophic Velocity Measurement Techniques for the Meridional Overturning Circulation and Meridional Heat Transport in the South Atlantic

    Source: Journal of Atmospheric and Oceanic Technology:;2011:;volume( 028 ):;issue: 011::page 1504
    Author:
    Perez, Renellys C.
    ,
    Garzoli, Silvia L.
    ,
    Meinen, Christopher S.
    ,
    Matano, Ricardo P.
    DOI: 10.1175/JTECH-D-11-00058.1
    Publisher: American Meteorological Society
    Abstract: wo ocean general circulation models are used to test the ability of geostrophic velocity measurement systems to observe the meridional overturning circulation (MOC) and meridional heat transport (MHT) in the South Atlantic. Model sampling experiments are conducted at five latitudes (between 15° and 34.5°S) spanning the range of extratropical current regimes in the South Atlantic. Two methods of estimating geopotential height anomalies and geostrophic velocities are tested, simulating dynamic height moorings (T?S array) and current and pressure recording inverted echo sounders (CPIES) deployed within the models. The T?S array accurately reproduces the MOC variability with a slight preference for higher latitudes, while the CPIES array has skill only at higher latitudes resulting from the increased geopotential height anomaly signal. Whether direct model velocities or geostrophic velocities are used, MHT and the MOC are strongly correlated, and successful reconstruction of MHT only occurs when there is skill in the MOC reconstructions. The geopotential height anomaly signal is concentrated near the boundaries along 34.5°S, suggesting that this is an advantageous latitude for deployment of an in situ array. Four reduced arrays that build upon the sites from two existing pilot arrays along 34.5°S were examined. For these realistically sized arrays, the MOC and MHT reconstructions from the T?S and CPIES arrays have comparable skill, and an array of approximately 20 instruments can be effectively used to reproduce the temporal evolution and vertical structure of the MOC and MHT.
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      Geostrophic Velocity Measurement Techniques for the Meridional Overturning Circulation and Meridional Heat Transport in the South Atlantic

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4227906
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    • Journal of Atmospheric and Oceanic Technology

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    contributor authorPerez, Renellys C.
    contributor authorGarzoli, Silvia L.
    contributor authorMeinen, Christopher S.
    contributor authorMatano, Ricardo P.
    date accessioned2017-06-09T17:24:01Z
    date available2017-06-09T17:24:01Z
    date copyright2011/11/01
    date issued2011
    identifier issn0739-0572
    identifier otherams-84557.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227906
    description abstractwo ocean general circulation models are used to test the ability of geostrophic velocity measurement systems to observe the meridional overturning circulation (MOC) and meridional heat transport (MHT) in the South Atlantic. Model sampling experiments are conducted at five latitudes (between 15° and 34.5°S) spanning the range of extratropical current regimes in the South Atlantic. Two methods of estimating geopotential height anomalies and geostrophic velocities are tested, simulating dynamic height moorings (T?S array) and current and pressure recording inverted echo sounders (CPIES) deployed within the models. The T?S array accurately reproduces the MOC variability with a slight preference for higher latitudes, while the CPIES array has skill only at higher latitudes resulting from the increased geopotential height anomaly signal. Whether direct model velocities or geostrophic velocities are used, MHT and the MOC are strongly correlated, and successful reconstruction of MHT only occurs when there is skill in the MOC reconstructions. The geopotential height anomaly signal is concentrated near the boundaries along 34.5°S, suggesting that this is an advantageous latitude for deployment of an in situ array. Four reduced arrays that build upon the sites from two existing pilot arrays along 34.5°S were examined. For these realistically sized arrays, the MOC and MHT reconstructions from the T?S and CPIES arrays have comparable skill, and an array of approximately 20 instruments can be effectively used to reproduce the temporal evolution and vertical structure of the MOC and MHT.
    publisherAmerican Meteorological Society
    titleGeostrophic Velocity Measurement Techniques for the Meridional Overturning Circulation and Meridional Heat Transport in the South Atlantic
    typeJournal Paper
    journal volume28
    journal issue11
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/JTECH-D-11-00058.1
    journal fristpage1504
    journal lastpage1521
    treeJournal of Atmospheric and Oceanic Technology:;2011:;volume( 028 ):;issue: 011
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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