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首页> 外文期刊>Journal of Physical Oceanography >Cruise Observation of Rossby Waves with Finite Wavelengths Propagating from the Pacific to the South China Sea
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Cruise Observation of Rossby Waves with Finite Wavelengths Propagating from the Pacific to the South China Sea

机译：有限波长从太平洋传播到南中国海的Rossby波的巡航观测

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摘要

This study deals with the physical properties and 3D structures of the wave motions with finite wavelengths of O(100-550) km in the tropical western North Pacific and their variation as propagating from the Pacific to the South China Sea (SCS) using conductivity-temperature-depth observations taken in October and November 2005 and concurrent satellite altimeter data. Three wave components with wavelength bands of O(100), O(200), and O(550) km are derived from the isopycnal undulation signals along 218, 188, and 158N using the ensemble empirical mode decomposition analysis. Their maximum amplitudes are over 100 min the layer of 1000-2000 m. Phase speeds are derived from cruise-observed vertical profiles of zonal-mean geostrophic flow velocity and the Brunt-Vaisala frequency based on linear quasigeostrophic wave theory with background flow and topography. The speeds are also derived from concurrent sea level anomaly data with the objective Radon transform method. They are close to that of the first baroclinic mode of theoretical solutions, implying that the observed wave motions possess the physical properties of Rossby waves (RWs). The vertical structures of the first generalized modes are derived from cruise observations at three sections. It is shown that the RWs continuously propagate from the Pacific to the SCS, and the available potential energy of RWs 1 and 2 intensify 3-4 times in the Luzon Strait and the SCS compared to that in the Pacific.
机译：这项研究研究了北太平洋热带西部具有有限波长O（100-550）km的波的物理性质和3D结构，以及它们使用电导率从太平洋传播到南海（SCS）时的变化。在2005年10月和2005年11月进行的温度深度观测以及同时的卫星高度计数据。使用整体经验模态分解分析从沿218、188和158N的等腰波信号中导出了波长为O（100），O（200）和O（550）km的三个波分量。它们的最大振幅在1000-2000 m的层中超过100分钟。相速度是基于线性准地转波理论，背景流动和地形，从巡航观测的纬向平均地转流速度垂直分布和Brunt-Vaisala频率得出的。速度还可以通过客观Radon变换方法从同时存在的海平面异常数据中得出。它们接近于理论解的第一个斜压模式，这意味着观察到的波运动具有罗斯比波（RWs）的物理特性。第一广义模式的垂直结构是从三部分的巡航观测中得出的。结果表明，RWs不断从太平洋传播到南海，而吕宋海峡和南海的RWs 1和2的可用势能是太平洋的3-4倍。

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  • 来源
    《Journal of Physical Oceanography》 |2016年第10期|2897-2913|共17页
  • 作者

    Xie Lingling; Zheng Quanan; Tian Jiwei; Zhang Shuwen; Feng Ying; Yi Xiaofei;

  • 作者单位

    Guangdong Ocean Univ, Guangdong Key Lab Coastal Ocean Variabil & Disast, Zhanjiang, Peoples R China|Univ Maryland, Dept Atmospher & Ocean Sci, 2421 Comp & Space Sci Bldg, College Pk, MD 20742 USA;

    Univ Maryland, Dept Atmospher & Ocean Sci, 2421 Comp & Space Sci Bldg, College Pk, MD 20742 USA;

    Ocean Univ China, Phys Oceanog Lab, Qingdao, Peoples R China;

    Guangdong Ocean Univ, Guangdong Key Lab Coastal Ocean Variabil & Disast, Zhanjiang, Peoples R China;

    Xiamen Univ, Coll Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen, Peoples R China;

    Guangdong Ocean Univ, Guangdong Key Lab Coastal Ocean Variabil & Disast, Zhanjiang, Peoples R China;

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