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    Offshore Detachment Process of the Low-Salinity Water around Changjiang Bank in the East China Sea

    Source: Journal of Physical Oceanography:;2010:;Volume( 040 ):;issue: 005::page 1035
    Author:
    Moon, Jae-Hong
    ,
    Hirose, Naoki
    ,
    Yoon, Jong-Hwan
    ,
    Pang, Ig-Chan
    DOI: 10.1175/2010JPO4167.1
    Publisher: American Meteorological Society
    Abstract: A patchlike structure of low-salinity water detached from the Chanjiang ?Diluted Water? (CDW) is frequently observed in the East China Sea (ECS). In this study, the offshore detachment process of CDW into the ECS is examined using a three-dimensional numerical model. The model results show that low-salinity water is detached from the CDW plume by the intense tide-induced vertical mixing during the spring tide period when the tidal current becomes stronger. During the spring tide, thickness of the bottom mixed layer in the sloping bottom around Changjiang Bank reaches the mean water depth, implying that the stratification is completely destroyed in the entire water column. As a result, the offshore detachment of CDW occurs in the sloping side of the bank where the tidal energy dissipation is strong enough to overcome the buoyancy effect during this period. On the other hand, the surface stratification is retrieved during the neap tide period, because the tidal current becomes substantially weaker than that in the spring tide. Wind forcing over the ECS as well as tidal mixing is a critical factor for the detachment process because the surface wind primarily induces a northeastward CDW transport across the shelf region where tide-induced vertical mixing is strong. Moreover, the wind-enhanced cross-isobath transport of CDW causes a larger offshore low-salinity patch, indicating that the freshwater volume of the low-salinity patch closely depends on the wind magnitude.
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      Offshore Detachment Process of the Low-Salinity Water around Changjiang Bank in the East China Sea

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4212710
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    contributor authorMoon, Jae-Hong
    contributor authorHirose, Naoki
    contributor authorYoon, Jong-Hwan
    contributor authorPang, Ig-Chan
    date accessioned2017-06-09T16:36:36Z
    date available2017-06-09T16:36:36Z
    date copyright2010/05/01
    date issued2010
    identifier issn0022-3670
    identifier otherams-70881.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4212710
    description abstractA patchlike structure of low-salinity water detached from the Chanjiang ?Diluted Water? (CDW) is frequently observed in the East China Sea (ECS). In this study, the offshore detachment process of CDW into the ECS is examined using a three-dimensional numerical model. The model results show that low-salinity water is detached from the CDW plume by the intense tide-induced vertical mixing during the spring tide period when the tidal current becomes stronger. During the spring tide, thickness of the bottom mixed layer in the sloping bottom around Changjiang Bank reaches the mean water depth, implying that the stratification is completely destroyed in the entire water column. As a result, the offshore detachment of CDW occurs in the sloping side of the bank where the tidal energy dissipation is strong enough to overcome the buoyancy effect during this period. On the other hand, the surface stratification is retrieved during the neap tide period, because the tidal current becomes substantially weaker than that in the spring tide. Wind forcing over the ECS as well as tidal mixing is a critical factor for the detachment process because the surface wind primarily induces a northeastward CDW transport across the shelf region where tide-induced vertical mixing is strong. Moreover, the wind-enhanced cross-isobath transport of CDW causes a larger offshore low-salinity patch, indicating that the freshwater volume of the low-salinity patch closely depends on the wind magnitude.
    publisherAmerican Meteorological Society
    titleOffshore Detachment Process of the Low-Salinity Water around Changjiang Bank in the East China Sea
    typeJournal Paper
    journal volume40
    journal issue5
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/2010JPO4167.1
    journal fristpage1035
    journal lastpage1053
    treeJournal of Physical Oceanography:;2010:;Volume( 040 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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