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首页> 外文期刊>Ocean Dynamics >Identification of different types of Kuroshio intrusion into the South China Sea
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Identification of different types of Kuroshio intrusion into the South China Sea

机译：识别不同类型的黑潮入侵南海

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摘要

Kuroshio intrusion into the South China Sea (SCS) has different forms. In this study, a Kuroshio SCS Index (KSI) is defined using the integral of geostrophic vorticity from 118° to 121° E and from 19° to 23° N. Three typical paths (the looping path, the leaking path, and the leaping path) were identified based on the KSI derived from the weekly satellite Absolute Dynamic Topography from 1993 to 2008. The KSI has a near normal distribution. Using ±1 standard deviation (σ) as the thresholds, the leaking path is the most frequent form with the probability of occurrence at 68.2%, while the probabilities of occurrence for the looping path and the leaping path are 16.4% and 15.4%, respectively. Similar analysis is also conducted on the daily Hybrid Coordinate Ocean Model (HYCOM) Global Analysis from 2004 to 2008. The results are generally consistent with the KSI analysis of the satellite data. The HYCOM data are further analyzed to illustrate patterns of inflows/outflows and the maximum/minimum salinity as representatives of the subsurface/intermediate waters. The Kuroshio bending and the net inflow through the Luzon Strait reduce from the looping path to the leaking path to the leaping path. However, the Kuroshio subsurface water intrudes farthest into the SCS for the leaking path.Vorticity budget associated with the different intrusion types is then analyzed. The tilting of the relative vorticity, the stretching of the absolute vorticity, and the advection of planetary vorticity are important for the change of vorticity, whereas the baroclinic and frictional contributions are three orders smaller.
机译：黑潮入侵南中国海（SCS）的形式不同。在这项研究中，黑潮SCS指数（KSI）使用118°至121°E和19°至23°N的地转涡度积分进行定义。三种典型路径（循环路径，泄漏路径和跃迁）路径）是根据1993年至2008年每周卫星绝对动态地形图得出的KSI确定的。KSI的分布接近正态分布。使用±1标准偏差（σ）作为阈值，泄漏路径是最常见的形式，发生概率为68.2％，而循环路径和跳跃路径的发生概率分别为16.4％和15.4％。 。对2004年至2008年的每日混合坐标海洋模型（HYCOM）全局分析也进行了类似的分析。结果通常与卫星数据的KSI分析一致。对HYCOM数据进行了进一步分析，以说明流入/流出的模式以及最大/最小盐度作为地下/中间水域的代表。黑潮弯曲和通过吕宋海峡的净流入量从环状路径到泄漏路径再到跳跃路径减少。然而，黑潮地下水侵入的距离最远是南海的泄漏路径，然后分析了与不同侵入类型相关的涡度预算。相对涡度的倾斜，绝对涡度的伸展以及行星涡度的平流对于涡度的变化很重要，而斜压和摩擦力的贡献要小三个数量级。

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  • 来源
    《Ocean Dynamics》 |2011年第9期|p.1291-1304|共14页
  • 作者

    Feng Nan; Huijie Xue; Fei Chai; Lei Shi; Maochong Shi; Peifang Guo;

  • 作者单位

    School of Marine Sciences, University of Maine,Orono, ME, USA,College of Physical and Environmental Oceanography,Ocean University of China,Qingdao, China;

    School of Marine Sciences, University of Maine,Orono, ME, USA;

    School of Marine Sciences, University of Maine,Orono, ME, USA;

    School of Marine Sciences, University of Maine,Orono, ME, USA;

    College of Physical and Environmental Oceanography,Ocean University of China,Qingdao, China;

    College of Physical and Environmental Oceanography,Ocean University of China,Qingdao, China;

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

    south china sea; kuroshio intrusion; vorticity; current loop;

    机译：南中国海;黑潮入侵涡度电流回路;

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