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Measurements of turbulent dissipation during the Bahamas Optical Turbulence Experiment

机译：巴哈马光学湍流实验中湍流耗散的测量

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摘要

The Bahamas Optical Turbulence Experiment (BOTEX) was conducted in the summer of 2011 to investigate the impact of turbulence on underwater optical imaging. Underwater optical properties can be affected by turbulence in the water, due to localized changes in the index of refraction. We discuss measurements of current velocity and temperature, made with a Nortek Vector Acoustic Doppler Velocimeter (ADV) and PME Conductivity-Temperature (CT) probe, as well as observations made with a Rockland Oceanographic Vertical Microstructure Profiler (VMP). The instruments were deployed in close proximity in the field and in the context of measurements of optical target clarity. Turbulent kinetic energy dissipation (TKED) and temperature dissipation (TD) rates are calculated from the ADV/CT measurements and compared to TKED and TD estimated from the data collected with the VMP. The results show reasonable agreement between the two methods; differences are attributed to turbulence patchiness and intermittence, as well as sampling challenges. The study also highlights the importance of collecting concurrent data on temperature, current velocity, and current shear to assess the turbulence impact on underwater optical properties.
机译：2011年夏天进行了巴哈马光学湍流实验（BOTEX），以研究湍流对水下光学成像的影响。由于折射率的局部变化，水下的光学特性会受到水中湍流的影响。我们将讨论使用Nortek矢量声学多普勒测速仪（ADV）和PME电导率-温度（CT）探头进行的当前速度和温度测量，以及使用Rockland海洋学垂直微结构轮廓仪（VMP）进行的观测。在实地测量光学目标清晰度的情况下，将这些仪器部署在附近。湍流动能耗散（TKED）和温度耗散（TD）速率是通过ADV / CT测量得出的，并与根据VMP收集的数据估算出的TKED和TD相比较。结果表明两种方法之间的合理一致性。差异归因于湍流的不连续性和间歇性以及抽样挑战。该研究还强调了收集有关温度，电流速度和电流剪切的并发数据以评估湍流对水下光学特性的影响的重要性。

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  • 来源
    《Ocean sensing and monitoring V》|2013年|872405.1-872405.10|共10页
  • 会议地点 Baltimore MD(US)
  • 作者

    Silvia Matt; Weilin Hou; Sarah Woods; Ewa Jarosz; Wesley Goode; Alan Weidemann;

  • 作者单位

    National Research Council Postdoctoral Research Associate Ocean Sciences Branch, Naval Research Laboratory, Stennis Space Center, MS, USA;

    Ocean Sciences Branch, Naval Research Laboratory, Stennis Space Center, MS, USA;

    NRL ASEE Postdoctoral Fellow;

    Ocean Sciences Branch, Naval Research Laboratory, Stennis Space Center, MS, USA;

    Ocean Sciences Branch, Naval Research Laboratory, Stennis Space Center, MS, USA;

    Ocean Sciences Branch, Naval Research Laboratory, Stennis Space Center, MS, USA;

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

    optical turbulence; TKED; TD; turbulence measurements;

    机译：光学湍流TKED； TD;湍流测量;

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