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Water mass formation and seasonal variations in the Yellow and East China Seas and effect of the wind and transport variation.

机译：黄海和东海的水团形成和季节变化以及风和运输变化的影响。

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摘要

The Yellow Sea and East China Sea is a wide shelf area where mixing is active between saline Kuroshio water and fresh coastal and shelf water. The water mass is, thus, very interesting to study in this area. Water masses are determined based on relatively long term NODC temperature and salinity observations using a statistical cluster analysis. Results shows strong seasonal variations of the water masses delineated, the temperature and salinity range, and the distribution of each water mass. In summer, fresh and warm surface water separates from the other water masses. In winter, water masses are separated horizontally and not vertically.; The POM based Yellow Sea Model is utilized to study the behavior of warm saline water sources (Kuroshio and the Taiwan Warm Current: TWC) and the wind effect by adding an imaginary tracer at the Kuroshio and TWC entrance. The three year (1994–1996) model run is analyzed excluding the six-month spin up for both the with and without wind cases. Results shows the Kuroshio water flows into the Yellow Sea and the Korea Strait whether there is wind or not. TWC water covers mainly the surface layer of the northwestern half of the East China Sea. Strong winter northwesterly winds push the flow pattern more northwest-ward in the shape of intermittent intrusions into the Yellow Sea due to relaxation of the wind. Summer monsoon, on the contrary, supports a northeast-ward flow pattern.; Horizontal salt flux is investigated based on the model salinity and velocity field. The Kuroshio main stream area shows strong salt influx. Along the Chinese coastal area, fresh water influx is dominant. The salt flux is dominant in the surface layer.; Major water mass formation mechanisms in the study area are the surface cooling, fresh water addition at the surface, and advection of the open ocean water. Wind affects mostly the surface layer and horizontal mixing at the boundary of the Kuroshio and Taiwan Warm Current.
机译：黄海和东海是一个宽阔的陆架区域，在这里盐分的黑潮水与新鲜的沿海和陆架水混合活跃。因此，在该区域研究水团非常有趣。使用统计聚类分析，根据相对长期的NODC温度和盐度观测值确定水量。结果表明，所描绘的水团，温度和盐度范围以及每种水团的分布均呈现强烈的季节性变化。在夏季，新鲜和温暖的地表水与其他水团分开。在冬天，水团是水平分开的，而不是垂直分开的。通过基于POM的黄海模型，通过在黑潮和TWC入口处添加一个假想的示踪剂，研究温暖的盐水源（黑潮和台湾暖流：TWC）的行为以及风效应。分析了三年（1994-1996）的模型运行，不包括有风和无风情况下的六个月加速。结果表明，无论是否有风，黑潮水都流入黄海和朝鲜海峡。 TWC水主要覆盖东海西北部的表层。冬季偏强的西北风由于风的缓和而呈间歇性侵入黄海的形式，将气流模式推向西北。相反，夏季风支持东北风。基于盐度和速度场模型研究了水平盐通量。黑潮干流地区盐分大量涌入。在中国沿海地区，淡水大量涌入。盐通量在表层占主导地位。研究区域的主要水团形成机制是地表冷却，地表淡水添加以及开放海水的平流。风主要影响黑潮和台湾暖流边界的表层和水平混合。

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