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本文着重探讨东海北部区域底层冷水的形成和季节变化过程,指出北部冷水系冬季黄海沿岸水南下向东海输送低温水,并与外海高盐水混合变性形成的,它具有明显的移动规律。阐述了黄海沿岸水沿陆架下沉与黑潮次-中层水爬升的关系及其对北部冷水的影响。本文还分析了济州岛南部区域双跃层现象的类型及其波状结构的成因。发现上,下跃层之间存在着“跃层间环流”,它将导致双扩散的发生和有利于双跃层的维持。
This paper focuses on the formation and seasonal variation of the cold water in the northern part of the East China Sea. It is pointed out that the cold water in the northern part of the Yellow River is transported to the East China Sea in winter, and transported to the East China Sea with cold water. The relationship between the subsidence of the Yellow Sea water along the continental shelf and the climb of the Kuroshio secondary-middle water and its impact on the northern cold water are also described. The paper also analyzes the types of double-jump phenomenon and the causes of its wavy structure in the southern area of Jeju Island. It is found that there exists “inter-climactic circulation” between upper and lower thermocline, which will lead to the occurrence of double diffusions and the maintenance of double thermocline.