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    Why Are There Upwellings on the Northern Shelf of Taiwan under Northeasterly Winds?

    Source: Journal of Physical Oceanography:;2010:;Volume( 040 ):;issue: 006::page 1405
    Author:
    Chang, Yu-Lin
    ,
    Oey, Lie-Yauw
    ,
    Wu, Chau-Ron
    ,
    Lu, Hung-Fu
    DOI: 10.1175/2010JPO4348.1
    Publisher: American Meteorological Society
    Abstract: Upwellings are observed on the northern shelf of Taiwan during northeasterly winds. Analytical and realistic numerical models are used to explain how vertical motions are created by divergence and convergence produced by wind acting on the vorticity field of two strong jets: the Kuroshio and the Taiwan Warm Current. The seaward increase in cyclonic vorticity near the Kuroshio?s western edge favors a stronger Ekman transport away from the jet, producing upwelling at the shelfbreak under a northeasterly wind. A similar mechanism for generating vertical motions is found across the Taiwan Warm Current. The numerical model results indicate that the vorticity effects can account for up to 30%?50% of the total variation in the surface Ekman transport. Except during summer?s weak southwesterlies, northeasterly wind is dominant over the East China Sea, suggesting that the vorticity effects may be prominent in the observed shelfbreak upwelling in nonsummer months.
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      Why Are There Upwellings on the Northern Shelf of Taiwan under Northeasterly Winds?

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4212768
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    • Journal of Physical Oceanography

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    contributor authorChang, Yu-Lin
    contributor authorOey, Lie-Yauw
    contributor authorWu, Chau-Ron
    contributor authorLu, Hung-Fu
    date accessioned2017-06-09T16:36:49Z
    date available2017-06-09T16:36:49Z
    date copyright2010/06/01
    date issued2010
    identifier issn0022-3670
    identifier otherams-70932.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4212768
    description abstractUpwellings are observed on the northern shelf of Taiwan during northeasterly winds. Analytical and realistic numerical models are used to explain how vertical motions are created by divergence and convergence produced by wind acting on the vorticity field of two strong jets: the Kuroshio and the Taiwan Warm Current. The seaward increase in cyclonic vorticity near the Kuroshio?s western edge favors a stronger Ekman transport away from the jet, producing upwelling at the shelfbreak under a northeasterly wind. A similar mechanism for generating vertical motions is found across the Taiwan Warm Current. The numerical model results indicate that the vorticity effects can account for up to 30%?50% of the total variation in the surface Ekman transport. Except during summer?s weak southwesterlies, northeasterly wind is dominant over the East China Sea, suggesting that the vorticity effects may be prominent in the observed shelfbreak upwelling in nonsummer months.
    publisherAmerican Meteorological Society
    titleWhy Are There Upwellings on the Northern Shelf of Taiwan under Northeasterly Winds?
    typeJournal Paper
    journal volume40
    journal issue6
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/2010JPO4348.1
    journal fristpage1405
    journal lastpage1417
    treeJournal of Physical Oceanography:;2010:;Volume( 040 ):;issue: 006
    contenttypeFulltext
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