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Resurfacing of South Pacific Tropical Water in the Equatorial Pacific and Its Variability Associated with ENSO

机译：赤道太平洋南太平洋热带水的重铺及其变化与ENSO相关

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摘要

Analysis of results from a simulated passive tracer confirms the resurfacing of South Pacific Tropical Water in the equatorial Pacific. Over the period of integration (1993-2011), both the volume and barycenter of the South Pacific Tropical Water that resurfaces in the equatorial Pacific are tightly linked to El Nino-Southern Oscillation (ENSO), with their correlation with the Nino-3.4 index reaching -0.79 and 0.84, respectively. Their correlation (-0.75 and 0.85) with the sea surface salinity index, Nino-S34.8, is also high. Of particular interest is that both the volume and barycenter of the resurfacing South Pacific Tropical Water peak earlier than the ENSO indices by about 3 months. On the interannual time scale, the resurfacing of South Pacific Tropical Water may modulate the sea surface salinity in the equatorial Pacific at a rate equivalent to as much as 25% of the surface freshwater flux. The results suggest that the resurfacing of South Pacific Tropical Water directly contributes to the sea surface salinity variability in the equatorial Pacific and potentially plays a role in ENSO evolution.
机译：对模拟被动示踪剂结果的分析证实了赤道太平洋南太平洋热带水的重铺。在整合时期（1993-2011年），赤道太平洋重现的南太平洋热带水的体积和重心与厄尔尼诺-南方涛动（ENSO）紧密相关，并且与Nino-3.4指数相关分别达到-0.79和0.84。它们与海面盐度指数Nino-S34.8的相关性（-0.75和0.85）也很高。特别令人感兴趣的是，重铺的南太平洋热带水的体积和重心都比ENSO指数早了约3个月。在每年的时间尺度上，南太平洋热带水的重铺可能会调节赤道太平洋海面盐度，其速率相当于地表淡水通量的25％。结果表明，南太平洋热带水的重铺直接影响了赤道太平洋海表盐度的变化，并可能在ENSO演化中发挥作用。

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    《Journal of Physical Oceanography》 |2017年第5期|1095-1106|共12页
  • 作者

    Qu Tangdong; Gao Shan;

  • 作者单位

    Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Los Angeles, CA USA|Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr, Honolulu, HI 96822 USA;

    Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China;

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