AbstractIn addition to widely discussed seasonal variability, the barrier layer (BL) of the South China Sea (SC'/> Role of wind forcing and eddy activity in the intraseasonal variability of the barrier layer in the South China Sea
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Role of wind forcing and eddy activity in the intraseasonal variability of the barrier layer in the South China Sea

机译：强迫和涡旋活动在南海屏障层季节内变化中的作用

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摘要

AbstractIn addition to widely discussed seasonal variability, the barrier layer (BL) of the South China Sea (SCS) also exhibits significant intraseasonal variability (ISV) and plays an important role in the upper heat and salt balances. The characteristics and mechanisms of spatiotemporal variations in the BL are investigated using an eddy-resolving ocean model OFES (OGCM For the Earth Simulator) ouput and related atmospheric and oceanic processes. The active intraseasonal BL variability in the SCS occurs mainly during the late summer/autumn and winter and exhibits remarkable differences between these two periods. The BL ISV in late summer/autumn occurs in the southern basin, while in winter, it is limited to the northwestern basin. To further discuss the evolution and driving thermodynamic mechanisms, we quantify the processes that control the variability of intraseasonal BL. Different mechanisms for the intraseasonal BL variability for these two active periods are investigated based on the case study and composite analysis. During late summer/autumn, the active BL in the southern basin is generated by advected and local freshwater, and then decays rapidly with the enhanced wind. In winter, anticyclonic eddy activity is associated with the evolution of the BL by affecting the thermocline and halocline variations, while wind stress and wind stress curl have no obvious influence on BL.
机译： Abstract 除了广泛讨论的季节性变化之外，该层的屏障层（BL）南海（SCS）还表现出明显的季节内变异性（ISV），并在较高的热量和盐分平衡中发挥重要作用。利用解决涡流的海洋模型OFES（用于地球模拟器的OGCM）输出以及相关的大气和海洋过程，研究了BL中时空变化的特征和机理。 SCS中活跃的季节内BL变异主要发生在夏末/秋季和冬季，并且在这两个时期之间表现出显着差异。 BL ISV在夏末/秋季发生在南部盆地，而在冬季，它仅限于西北盆地。为了进一步讨论进化和驱动热力学机制，我们量化了控制季节内BL变异的过程。在案例研究和综合分析的基础上，研究了这两个活跃期的季节内BL变化的不同机制。在夏末/秋季，南部流域的活跃BL是由平流和局部淡水产生的，然后随着风的增强而迅速衰减。冬季，反气旋涡活动通过影响温跃层和盐环的变化而与BL的演化有关，而风应力和风应力卷曲对BL则没有明显的影响。

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  • 来源
    《Ocean Dynamics》 |2018年第3期|363-375|共13页
  • 作者

    Zhanlin Liang; Qiang Xie; Lili Zeng; Dongxiao Wang;

  • 作者单位

    State Key Laboratory of Tropical Oceanography (LTO), South China Sea Institute of Oceanology, Chinese Academy of Sciences,University of Chinese Academy of Sciences;

    State Key Laboratory of Tropical Oceanography (LTO), South China Sea Institute of Oceanology, Chinese Academy of Sciences,Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences,Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology;

    State Key Laboratory of Tropical Oceanography (LTO), South China Sea Institute of Oceanology, Chinese Academy of Sciences;

    State Key Laboratory of Tropical Oceanography (LTO), South China Sea Institute of Oceanology, Chinese Academy of Sciences;

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  • 正文语种 eng
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  • 关键词

    South China Sea; Intraseasonal variability; Barrier layer; Wind stress; Eddy kinetic energy;

    机译：南海季节内变化障碍层风应力涡动能;

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