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Observations of Internal Gravity Waves by Argo Floats

机译:Argo浮子对内部重力波的观测

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摘要

This study examines the global variability of the internal wave field near a depth of 1000 m using data from a set of 194 Argo floats equipped with Iridium communications, capable of measuring hourly temperature and pressure during the park phase of their 10-day cycles. These data have been used to estimate vertical isotherm displacements at hourly intervals, yielding a global measure of the heaving due to internal gravity waves. The displacement results have been employed to examine the global variability of these waves and how the displacement power spectrum compares to the canonical Garrett-Munk spectrum. Using the data, the authors find correlations between internal wave intensity and seafloor roughness, proximity to the seafloor, and the magnitude of the local barotropic velocity. The measurements also show large seamount-trapped waves at high latitudes and coastally trapped subinertial waves. These observations provide a rough global census of the nature of these waves that can ultimately be used in studies of ocean mixing.
机译:这项研究使用一组194个配备铱缆通信的Argo浮标的数据,研究了1000 m深度附近内部波场的整体变化,该浮标能够测量10天周期的停泊阶段的每小时温度和压力。这些数据已用于估计每小时间隔的垂直等温线位移,从而产生了由内部重力波引起的隆起的整体度量。位移结果已用于检查这些波的整体变异性,以及位移功率谱与标准Garrett-Munk谱的比较。利用这些数据,作者找到了内部波浪强度与海底粗糙度,与海底的接近度以及局部正压速度大小之间的相关性。测量结果还显示出在高纬度地区海域捕获的大波浪和在沿海地区捕获的惯性波。这些观测结果对这些海浪的性质进行了粗略的全球普查,最终可用于海洋混合研究。

著录项

  • 来源
    《Journal of Physical Oceanography》 |2014年第9期|2370-2386|共17页
  • 作者单位

    Univ Washington, Sch Oceanog, Seattle, WA 98195 USA;

    Univ Washington, Sch Oceanog, Seattle, WA 98195 USA;

    Univ Washington, Sch Oceanog, Seattle, WA 98195 USA|Univ Washington, Appl Phys Lab, Seattle, WA 98195 USA;

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  • 正文语种 eng
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