论文部分内容阅读
本文用一个两层原始方程数值模式，对东海的环流现象进行了机制性的探讨。从整体上来看，海区的一些主要流态特征彼此密切相关，且在动力上都是比较稳定的。黑潮在台湾东北的入侵主要表现在下层。底斜联合效应（ＪＥＢＡＲ）、惯性效应、摩擦效应都是这支入侵流态的发生机制，而底形与行星β效应则使它表现出向岛强化的特征。下层黑潮入侵后，大部分作反气旋回转，成为台湾暖流（ＴＷＣ）下层的外海分支。ＴＷＣ下层沿岸分支能否形成，则取决于黑潮入流上下流速比γ的大小，以及上层海峡入流是否北上。ＴＷＣ上层流动的形成是海峡水入侵后在β效应作用下的结果，它在温州外海也将分出一支向外海流去。文章指出，台湾东北的冷水块不是“尾涡”所致，而是下层黑潮舌状入侵的具体表征；台湾北部的暖涡则是上层ＴＷＣ北上时与冷水块相互作用的结果。此外，本文对钓鱼岛以北的锋涡与逆流现象也作了一些初步的分析与讨论。
In this paper, we use a two-layer numerical model of the original equation to discuss the circulation phenomenon in the East China Sea in a mechanistic way. As a whole, some of the major fluid characteristics of the sea area are closely related to each other and are relatively stable in power. The invasion of Kuroshio in northeast Taiwan mainly manifests itself in the lower levels. JEBAR, inertial effect and friction effect are the mechanism of this invaded fluid regime, while the bottom shape and planet β effect make it show the characteristics of strengthening to the island. After the invasion of the lower Kuroshio region, most of them were turned into anti-cyclones and became the offshore branch of the Lower Taiwan Warm Current (TWC). The formation of branches along the lower bank of the TWC depends on the magnitude of the upper and lower flow rate γ of the Kuroshio influx and the northward inflow of the upper strait. The formation of the upper TWC flow is the result of the β effect after the water intrusion from the Strait, and it will also divert an outward current to the open sea in Wenzhou. The article points out that the cold water in northeast Taiwan is not caused by “wake vortex” but rather the specific characterization of the tongue-like invasion of lower Kuroshio. The warm vortex in northern Taiwan is the result of interaction with the cold water block when the upper TWC goes northward. In addition, this paper also made some preliminary analysis and discussion on the front vortex and counter current of the Diaoyu Island.