当前位置: X-MOL 学术J. Oceanogr. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The features and mechanisms of the North Shandong Coastal Current: a case study in 2014
Journal of Oceanography ( IF 1.3 ) Pub Date : 2021-02-26 , DOI: 10.1007/s10872-021-00597-3
Xiangyang Zheng , Hua Zhang , Yanfang Li , Tao Zou , Xin Liu , Qianguo Xing

The North Shandong Coastal Current (NSCC) is an important transporting route for sediment, drifting algae, and spilled oil from the Bohai Sea to the Yellow Sea. This study investigated the features and formation mechanism of the NSCC using observational data of current velocity and a numerical coastal ocean model. Our results confirmed the existence of the NSCC in the sense of climatological current in winter when northerly wind prevails in the Bohai Sea and Yellow Sea. The magnitude of the NSCC in the monthly time scale ranged 0.07–0.12 m/s and the current direction was parallel to the coastline. The detided residual current on the pathway of the NSCC was unstable, but variable with the local wind speed. The residual current was well correlated with northerly wind speed and tended to be parallel to coastline with the increase of wind speed. Strong wind plays key roles in the formation of eastward mean flow on the pathway of the NSCC in winter. We found that strong wind can generate a stronger eastward current in the southern side of the northern Yellow Sea, but a smaller westward return flow during the strong wind relaxation period. The asymmetry of wind-related residual current during and after strong wind events accounts for the formation of the eastward NSCC. A momentum analysis was performed using the numerical model results during strong wind events. We found that the barotropic pressure gradient was the dominant driving force of the residual current both during and after a strong wind event.



中文翻译:

鲁北沿海海流的特征与机理-以2014年为例

山东北部沿海海流(NSCC)是从渤海到黄海的沉积物,藻类和溢油的重要运输路线。本研究利用当前速度的观测数据和数值海洋模型研究了NSCC的特征和形成机理。我们的结果证实了在冬季,当渤海和黄海盛行北风时,在气候潮流方面存在NSCC。NSCC在每月时间尺度上的大小范围为0.07-0.12 m / s,当前方向与海岸线平行。在NSCC路径上,急需的剩余电流不稳定,但随局部风速而变化。剩余电流与北风速相关性很好,并且随着风速的增加趋向于与海岸线平行。冬季,强风在NSCC路径上东向平均气流的形成中起着关键作用。我们发现强风可以在黄海北部的南侧产生更强的东风,但是在强风弛豫期却产生较小的西风。在强风事件期间和之后,与风有关的剩余电流的不对称解释了东向NSCC的形成。在强风事件中,使用数值模型结果进行了动量分析。我们发现,在大风期间和之后,正压梯度是剩余电流的主要驱动力。我们发现强风可以在黄海北部的南侧产生更强的东风,但是在强风弛豫期却产生较小的西风回流。在强风事件期间和之后,与风有关的剩余电流的不对称解释了东向NSCC的形成。在强风事件中,使用数值模型结果进行了动量分析。我们发现,在大风期间和之后,正压梯度是剩余电流的主要驱动力。我们发现强风可以在黄海北部的南侧产生更强的东风,但是在强风弛豫期却产生较小的西风回流。在强风事件期间和之后,与风有关的剩余电流的不对称解释了东向NSCC的形成。在强风事件中,使用数值模型结果进行了动量分析。我们发现,在大风期间和之后,正压梯度是剩余电流的主要驱动力。在强风事件中,使用数值模型结果进行了动量分析。我们发现,在大风期间和之后,正压梯度是剩余电流的主要驱动力。在强风事件中,使用数值模型结果进行了动量分析。我们发现,在大风期间和之后,正压梯度是剩余电流的主要驱动力。

更新日期:2021-02-26
down
wechat
bug