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Tomographic measurement of tidal current and associated 3-h oscillation in Bali Strait

机译：巴厘岛海峡的潮流和相关3小时振荡的断层扫描测量

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摘要

A coastal acoustic tomography experiment involving four acoustic stations was conducted from June 1-3, 2016 in the northern part of the Bali Strait. Range-average currents obtained along four transmission paths for a 30-h observation period were investigated in two-period bands: (a) > 6 h and (b) 10 min-6 h. The dominant phenomena for period bands (a) and (b) were semidiurnal tides with periods of approximately 12 h and internal modes with periods of approximately 3 h, respectively. The phase of the semidiurnal tidal currents was significantly deviated from a sea surface height-current relation expected for the progressive waves in the observation site. The 3-h oscillation had an amplitude comparable to that of the semidiurnal tidal current (with amplitudes of 1.5 ms(-1)) and was embedded in a semidiurnal envelope oscillation. In relation to the semidiurnal sea surface variations, the 3-h oscillation reached a peak at low water and diminished at high water. The velocity error of 0.07 ms(-1) was estimated from the differential travel-time variations in the high-frequency band (10 min-1 h). The error was significantly smaller than the amplitudes of the semidiurnal tidal currents and the 3-h oscillation. Finally, it was suggested that the 3-h oscillation is an internal seiche synchronized with the semidiurnal tides.
机译：2016年6月1-3日，在巴厘岛海峡北部进行了涉及四个声学站的沿海声学层析成像实验。在两个时间段内研究了沿四个传输路径在30小时观察期内获得的范围平均电流：（a）> 6 h和（b）10 min-6 h。周期带（a）和（b）的主要现象分别是周期约为12 h的半日潮和周期约为3 h的内模。半日潮流的相位与观测地点的渐进波所预期的海面高度-电流关系显着偏离。 3-h振荡的振幅与半日潮汐电流的振幅相当（振幅为1.5 ms（-1）），并嵌入半日包络振荡中。关于半日海面变化，在低水位时3-h振荡达到峰值，在高水位时减弱。根据高频带（10 min-1 h）中的差分行进时间变化估计速度误差为0.07 ms（-1）。该误差明显小于半日潮流和3 h振荡的幅度。最后，有人提出3小时的振荡是与半日潮同步的内部潮汐。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2020年第may5期|106655.1-106655.8|共8页
  • 作者

  • 作者单位

    Hiroshima Univ Grad Sch Engn Higashihiroshima Hiroshima Japan;

    Agcy Assessment & Applicat Technol BPPT BPPT New Bldg 19th Fl J1 MH Thamrin 8 Jakarta 10340 Indonesia;

    Minist Nat Resources State Key Lab Satellite Ocean Environm Dynam Inst Oceanog 2 Hangzhou 310012 Peoples R China|Southern Marine Sci & Engn Guangdong Lab Zhuhai Zhuhai Peoples R China;

    Minist Nat Resources State Key Lab Satellite Ocean Environm Dynam Inst Oceanog 2 Hangzhou 310012 Peoples R China;

    Minist Nat Resources State Key Lab Satellite Ocean Environm Dynam Inst Oceanog 2 Hangzhou 310012 Peoples R China|Shanghai Jiao Tong Univ Sch Oceanog Shanghai 20030 Peoples R China;

    Natl Innovat Inst Def Technol 53 Dongdajie Beijing 100071 Peoples R China;

    Aqua Environm Monitoring Ltd Liabil Partnership 12-2 Aobadai Mihara 7230047 Japan;

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

    Coastal acoustic tomography; Semidiurnal tidal current; 3-h oscillation; Internal seiche; Bali strait;

    机译：沿海声学层析成像;半日潮流3小时振荡;内部业务;巴厘岛海峡;

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