论文部分内容阅读
利用作者已建立的σ坐标系下三维非线性斜压陆架模式，研究黄海冷水团（YSCWM）对长江冲淡水（CDW）扩展的影响。数值试验结果表明，黄海冷水团产生的余流，与黄海冷水团的强度和海底地形有关。在长江口海区由于底形的影响，黄海冷水团产生了向北流动的海流，阻碍着长江冲淡水沿岸向南扩展。在远离长江口海区，黄海冷水团产生的气旋式黄海环流诱导冲淡水向东南运动。总的黄海冷水团的作用是使长江冲淡水低盐水舌伸向东北，黄海冷水团越强，这种作用就越明显。黄海冷水团在夏季长江冲淡水伸向东北过程中起着重要的作用。
Using the established three-dimensional non-linear baroclinic shelf model in the σ coordinate system, the influence of the Yellow Sea cold water mass (YSCWM) on the CDW expansion was studied. The numerical results show that the residual flow produced by the Yellow Sea cold water mass is related to the strength of the Yellow Sea cold water mass and the seafloor topography. Due to the influence of bottom shape in the sea area of the mouth of the Yangtze River, the Yellow Sea cold water mass produced a current flowing northwards, which hindered the southward expansion of the Yangtze River’s red water along the coast. In the area far away from the mouth of the Yangtze River, the cyclonic Yellow Sea circulation produced by the Yellow Sea cold water mass induces the movement of red water to the southeast. The role of the total Yellow Sea cold water is to make the Yangtze River dilute salt water to the northeast, the stronger the Yellow Sea cold water mass, the more obvious this effect. The Yellow Sea cold water mass plays an important role in the summer when the Yangtze River freshwater reaches the northeast.