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首页> 外文期刊>Journal of Physical Oceanography >The Observed North Equatorial Countercurrent in the Far Western Pacific Ocean during the 2014-16 El Nino
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The Observed North Equatorial Countercurrent in the Far Western Pacific Ocean during the 2014-16 El Nino

机译：2014-16 El Nino期间观察到远西太平洋的北赤道逆流

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摘要

The structure and variations of the North Equatorial Countercurrent (NECC) in the far western Pacific Ocean during 2014-16 are investigated using repeated in situ hydrographic data, altimeter data, Argo data, and reanalysis data. The NECC shifted ～1° southward and intensified significantly with its transport exceeding 40 Sv (1 Sv = 10~6m~3s~(-1)), nearly double its climatology value, during the developing phase of the 2015/16 El Nino event. Observations show that the 2015/16 El Nino exerted a comparable impact on the NECC with that of the extreme 1997/98 El Nino in the far western Pacific Ocean. Baroclinic instability provided the primary energy source for the eddy kinetic energy (EKE) in the 2015/16 El Nino, which differs from the traditional understanding of the energy source of EKE as barotropic instability in low-latitude ocean. The enhanced vertical shear and the reduced density jump between the NECC layer and the North Equatorial Subsurface Current (NESC) layer renders the NECC-NESC system baroclinically unstable in the western Pacific Ocean during El Nino developing phase. The eddy-mean flow interactions here are diverse associated with various states of El Nino-Southern Oscillation (ENSO).
机译：在2014-16期间，使用重复的原位文程数据，高度计数据，ARGO数据和重新分析数据来研究远西太平洋北赤道逆流（NECC）的结构和变化。 NECC向南移动〜1°，其运输超过40​​ sv（1 sv = 10〜6m〜3s〜（-1）），其气候值几乎增加了两倍，在2015/16 El Nino事件的发展阶段。观察结果表明，2015/16 El Nino在远西太平洋的极端1997/98 El Nino施加了对NECC的相当影响。律林不稳定性为2015/16 El Nino提供了涡旋能量（EKE）的主要能源，这与对低纬度海洋中的波奇罗波特不稳定的传统理解不同。 NECC层和北赤道地下电流（NESC）层之间增强的垂直剪切和降低的密度跳跃使得在EL NINO开发阶段在西太平洋的NECC-NESC系统中的NECC-NESC系统。这里的涡流流动相互作用是与El Nino-Southern振荡（ENSO）各种州相关的多样化。

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  • 来源
    《Journal of Physical Oceanography》 |2021年第6期|2003-2020|共18页
  • 作者

    HUI ZHOU; HENGCHANG LIU; SHUWEN TAN; WENLONG YANG; YAO LI; XUEQI LIU; QIANG REN; WILLIAM K. DEWAR;

  • 作者单位

    CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao China University of Chinese Academy of Sciences Beijing China;

    CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao China University of Chinese Academy of Sciences Beijing China;

    CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao China University of Chinese Academy of Sciences Beijing China;

    CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao China University of Chinese Academy of Sciences Beijing China;

    CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao China;

    CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao China University of Chinese Academy of Sciences Beijing China;

    CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences and Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao China;

    Department of Ocean Atmosphere and Earth Sciences The Florida State University Tallahassee Florida Universite Grenoble Alpes CNRS IRD Grenoble INP IGE Grenoble France;

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

    Baroclinic flows; El Nino; ENSO; Instability; Ocean circulation; Ocean dynamics;

    机译：氨基克洛克斯;厄尔尼诺;enso;不稳定;海洋循环;海洋动力学;

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