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Composite eddy structures on both sides of the Luzon Strait and influence factors

机译：吕宋海峡两岸的复合涡结构及其影响因素

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摘要

Combining Argo observations with satellite remote sensing data during the period of 2002-2014, the mean three-dimensional structures of mesoscale eddies on both sides of the Luzon Strait (LS) were obtained via a composite method and analyzed to statistically examine the influences of background marine environment and the Kuroshio current on the eddy structures. The significant signals of temperature and salinity anomalies within the composite eddies extend much deeper in the region east of the LS (zone E) than those in the region west of the strait (zone W) because of stronger eddy intensity and larger vertical gradients of background temperature and salinity in the deep layer in zone E. In the vertical structure of temperature anomaly within the eddies, two cores occur at around 200 and 400dbar depths, respectively, in zone E and only one core is centered at about 100dbar in zone W. There is a clear three-core sandwich pattern in the vertical structure of salinity anomaly within the eddies in zone E. The Kuroshio water trapped in the eddy is responsible for abnormally positive salinity anomaly in the surface layer of the anticyclonic eddy center in zone W. On both sides of the LS, an asymmetric dipole structure in the surface layer gradually turns into a monopole one at depths, which resulted from the competition between horizontal advection effect and eddy pumping effect. The Kuroshio current influences the distribution patterns of isotherms and isohalines and enhances background temperature and salinity horizontal gradients on both sides of the LS, determining the orientations of dipole temperature and salinity structures within eddies.
机译：将Argo观测资料与2002-2014年期间的卫星遥感数据相结合，通过复合方法获得了吕宋海峡（LS）两侧中尺度涡旋的平均三维结构，并进行了统计分析，以分析背景的影响海洋环境和黑潮对涡结构的影响。由于涡旋强度更强且背景垂直梯度较大，复合涡流内温度和盐度异常的重要信号在海峡以东（E区）比海峡以西（W区）更深。在涡旋内温度异常的垂直结构中，涡旋内温度异常的垂直结构中，在涡旋E区，两个岩心分别出现在200dbar和400dbar深度处，而在涡旋W区中，仅一个岩心位于约100dbar的中心。在E区涡流中盐度异常的垂直结构中存在清晰的三核三明治模式。捕获在涡流中的黑潮水导致W区反气旋涡流中心表层的异常正盐度异常。在LS的两侧，由于水平对流之间的竞争，表层的不对称偶极结构在深度处逐渐变成单极子。效果和涡流效果。黑潮电流影响等温线和等盐线的分布方式，并增强LS两侧的背景温度和盐度水平梯度，从而确定涡流中偶极温度和盐度结构的方向。

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  • 来源
    《Ocean Dynamics》 |2018年第11期|1527-1541|共15页
  • 作者

    Zhang Wen-Zhou; Ni Qinbiao; Xue Huijie;

  • 作者单位

    Xiamen Univ, Fujian Prov Key Lab Coastal Ecol & Environm Studi, Xiamen, Peoples R China|SOA, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Zhejiang, Peoples R China|Xiamen Univ, Coll Ocean & Earth Sci, Dept Phys Oceanog, Xiamen 361005, Fujian, Peoples R China;

    Xiamen Univ, Fujian Prov Key Lab Coastal Ecol & Environm Studi, Xiamen, Peoples R China;

    Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China|Univ Maine, Sch Marine Sci, Orono, ME USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mesoscale eddy; Composite structure; Kuroshio current; Luzon Strait;

    机译：中尺度涡;复合结构;黑潮;吕宋海峡;

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