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首页> 外文期刊>Journal of oceanography >Criteria for the occurrence of wind-driven coastal upwelling associated with “Aoshio” on the southeast shore of Tokyo Bay
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Criteria for the occurrence of wind-driven coastal upwelling associated with “Aoshio” on the southeast shore of Tokyo Bay

机译：在东京湾东南岸发生与“青潮”有关的沿海风流上升的准则

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摘要

At the head of Tokyo Bay, coastal upwelling of oxygen-depleted bottom water, induced by northeasterly wind-driven circulation, sometimes leads to the deaths of many shellfish and other aquatic animals across large areas, resulting in substantial economic losses to coastal fisheries. One of the chemical actions associated with this dynamic process is the oxidation of hydrogen sulfide in the bottom water into a colloidal sulfur substance. When sunshine reflects off surface water containing these sulfur particles, the seawater appears milky blue. This phenomenon has been termed “Aoshio.” One of the most important issues to address concerning upwelling in relation to Aoshio is to accurately predict when it will occur as well as its area and scale. In the preliminary study described here, we propose criteria for the occurrence of wind-driven upwelling associated with Aoshio on the southeast shore of Tokyo Bay using two analytical solutions. These two solutions were derived based on some specific assumptions in the context of a two-layered fluid. Comparison with observation data suggested that the criteria were valid. The results of analyses of the sensitivity of the solutions to all of the parameters incorporated into them were also found to be in accord with our qualitative understanding of this phenomenon.
机译：在东京湾的顶部，由于东北风驱动的循环而导致沿海的缺氧底水上升，有时会导致大范围内许多贝类和其他水生动物死亡，给沿海渔业造成重大经济损失。与该动态过程相关的化学作用之一是将底部水中的硫化氢氧化为胶体硫物质。当阳光从含有这些硫颗粒的地表水反射回来时，海水会呈现乳白色。这种现象被称为“青尾”。关于与青潮有关的上升流，要解决的最重要问题之一是准确预测它何时发生以及其面积和规模。在这里描述的初步研究中，我们使用两种分析方法提出了在东京湾东南海岸与青潮相关的风力上升流发生的标准。这两种解决方案是基于两层流体中的某些特定假设而得出的。与观察数据的比较表明该标准是有效的。还发现解决方案对纳入其中的所有参数的敏感性的分析结果也符合我们对该现象的定性理解。

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