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Dynamics of medium-intensity dense water plumes in the Arkona Basin, Western Baltic Sea

机译：西波罗的海阿科纳盆地中强度浓水羽流动力学

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摘要

In this study, the dynamics of medium-intensity inflow events over Drogden Sill into the Arkona Sea are investigated. Idealised model simulations carried out with the General Estuarine Transport Model suggest that most of the salt transport during such inflow events occur north of Kriegers Flak, a shoal with less than 20 m water depth surrounded by water depths of more than 40 m. This assumption about the pathway is supported by recent ship-based observations in the Arkona Sea during a medium-intensity inflow event. The propagation of a saline bottom plume could be observed during several days after having passed Drogden Sill. In the area north of Kriegers Flak the plume was about 10 m thick, and propagated with more than 0.5 m s~(-1) and a salinity of up to 20 psu (with ambient water salinity being 8 psu) eastwards. Although the model simulations were idealised, the structural agreement between the observation and model result was good. The structure and pathways of these medium-intensity inflow events are of specific interest due to the plans for erecting extensive offshore wind farms in the Arkona Sea which may under certain circumstances lead to increased entrainment of ambient water into the bottom plumes.
机译：在这项研究中，研究了德罗登基尔上空进入阿科纳海的中等强度入流事件的动力学。用通用河口运输模型进行的理想化模型模拟表明，在此类入流事件中，大部分盐分运输发生在克瑞格斯山（Kriegers Flak）以北，水深小于20 m的浅滩被40 m以上的水深所包围。在中等强度入流事件期间，最近在阿科纳海进行的基于船的观测结果支持了关于该路径的这一假设。经过Drogden Sill之后的几天内，可以观察到盐碱羽流的扩散。在Kriegers Flak以北的地区，烟羽厚约10 m，并向东传播，超过0.5 m s〜（-1），盐度高达20 psu（环境水盐度为8 psu）。尽管模型仿真是理想化的，但是观测结果与模型结果之间的结构一致性很好。由于计划在阿科纳海建立广泛的海上风电场，这些中等强度入流事件的结构和途径特别令人关注，在某些情况下，这可能导致周围水进入底羽的增加。

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  • 来源
    《Ocean Dynamics》 |2005年第6期|391-402|共12页
  • 作者

    Hans Burchard; Hans Ulrich Lass; Volker Mohrholz; Lars Umlauf; Juergen Sellschopp; Volker Fiekas; Karsten Bolding; Lars Arneborg;

  • 作者单位

    Baltic Sea Research Institute Warnemuende, Seestr. 15, 18119 Rostock-Warnemuende, Germany;

    Baltic Sea Research Institute Warnemuende, Seestr. 15, 18119 Rostock-Warnemuende, Germany;

    Baltic Sea Research Institute Warnemuende, Seestr. 15, 18119 Rostock-Warnemuende, Germany;

    Baltic Sea Research Institute Warnemuende, Seestr. 15, 18119 Rostock-Warnemuende, Germany;

    FWG, Klausdorfer Weg 2-24, 24148 Kiel, Germany;

    FWG, Klausdorfer Weg 2-24, 24148 Kiel, Germany;

    Bolding Burchard Hydrodynamics GbR, Strandgyden 25, 5466 Asperup, Denmark;

    Department of Oceanography, Goeteborg University, Guldhedsg. 5A, Box 460, 40530 Goeteborg, Sweden;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    bottom plumes; entrainment; turbulent mixing; Baltic Sea;

    机译：底羽夹带;湍流混合波罗的海;

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