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Partial residence times: determining residence time composition in different subregions

机译：部分停留时间：确定不同分区的停留时间组成

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摘要

Residence time (RT) is a diagnosis widely used to quantify the water exchange rate and mass transport timescale in semi-enclosed systems. The RT focuses on only the total time a water parcel spends in a system (i.e., control region). However, for a system that consists of several subregions (e.g., sub-bays or functional zones), the RT will not include information about the time spent in different subregions. To determine the RT compositions in different subregions, partial residence times (PRTs) are proposed and defined as the amount of time a water parcel spends in different subregions until leaving the control region. The equations for PRTs are derived using the adjoint method, which can quickly determine the variation of PRTs in time and space. To validate the PRT diagnostic equation and numerical model, a test is conducted in an idealized 1D channel with idealized tidal currents. The numerical results are in excellent agreement with the analytical solution. Finally, the PRT method is applied to tide-dominated Jiaozhou Bay. The PRTs in six functional subregions of Jiaozhou Bay are derived, and the detailed RT compositions of the different functional subregions are presented. The application indicates that PRTs could provide detailed information and new insights into the water exchange process.
机译：停留时间（RT）是一种诊断方法，广泛用于量化半封闭系统中的水交换速率和大众运输时间尺度。 RT仅关注水包在系统（即控制区域）中花费的总时间。但是，对于由多个子区域（例如，子区域或功能区）组成的系统，RT将不会包含有关在不同子区域中花费的时间的信息。为了确定不同子区域中的RT组成，提出了部分停留时间（PRT），并将其定义为水包在不同子区域中停留直到离开控制区域所花费的时间。 PRT的方程式是使用伴随方法导出的，该方法可以快速确定PRT在时间和空间上的变化。为了验证PRT诊断方程和数值模型，在具有理想潮流的理想一维通道中进行了测试。数值结果与解析解非常吻合。最后，将PRT方法应用于潮汐为主的胶州湾。推导了胶州湾六个功能分区的PRT，并给出了不同功能分区的详细RT组成。该应用程序表明，PRT可以提供有关水交换过程的详细信息和新见解。

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  • 来源
    《Ocean Dynamics》 |2019年第9期|1023-1036|共14页
  • 作者

    Lin Lei; Liu Zhe;

  • 作者单位

    East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China|Ocean Univ China, Minist Educ, Key Lab Marine Environm & Ecol, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China;

    Ocean Univ China, Minist Educ, Key Lab Marine Environm & Ecol, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China|Natl Nat Sci Fdn China, Dept Earth Sci, Beijing, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Residence time; Water exchange; Transport timescale; Adjoint method; Jiaozhou Bay;

    机译：停留时间;水交换;运输时间尺度;伴随方法;jiazhou湾;

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