胶州湾湾口夏季海流时空分布特征  

Temporal and Spatial Distribution of the Summertime Sea Currents in the Jiaozhou Bay Mouth

作　　者：蔡忠亚[1] 刘哲[1] 陈子煜[1] 郭新宇[2] 高会旺[1] 

机构地区：[1]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100 [2]日本爱媛大学沿岸环境科学研究中心,日本松山7908577

出　　处：《中国海洋大学学报（自然科学版）》2014年第4期86-92,共7页Periodical of Ocean University of China

基　　金：国家海洋局公益项目(200805011)资助

摘　　要：基于2009年夏季中潮时胶州湾湾口薛家岛-团岛断面的走航ADCP观测数据,分析了胶州湾湾口断面海流时空分布特征及影响因素。结果表明:湾口处海水运动以潮流为主,总体表现为驻波性质,强流发生在涨、落潮中间时刻。受岸线诱导,湾口海流在涨潮(落潮)时呈西北(东南)向,流速在断面上主要表现为南北方向上的变化。平流项引起的"潮流调整"效应使得断面北侧西向海流和南侧东向海流被加强,造成海流东西分量在水平方向上存在不对称性现象,即南北两侧海水运动涨、落潮不同步,欧拉余流呈现"北进南出"的形态。同时,东风分量会使得断面中心区域产生"表进底出"形态,而南北方向欧拉余流结构受风影响较小。Based on the ADCP data observed during moderate tide in summer 2009, the temporal and spa- tial distribution of the sea currents in the Jiaozhou Bay （JZB） mouth was analyzed. The results show that the currents were dominated by tidal motion. The maximum tidal current occurs at the middle time of flood and ebb tide, respectively, characterized by stationary wave. Induced by the shoreline of JZB, cur- rents are directed northwestward （southeastward） during flood （ebb） tide, and the magnitude of the cur- rents mainly changes in the north-south direction. The tidal rectification due to the advection process strengthens, respectively, the westward flow in north and the eastward flow in south of the bay mouth, resulting in the horizontal asymmetric phenomenon. Consequently, the tidal currents in the south and north are asynchronous, and the Euler residual current shows the pattern of ＂inflow from north and out- flow from south＂. The east-west component of the Euler residual current shows an inflow in north part and an outflow in the south. The east-west component of the surface wind affects the vertical structure of the Euler residual current at the center of JZB mouth. The eastward wind during the observed period leads to an inflow in the upper layer and outflow in bottom layer, while the structure of the north-south compo- nent of the Euler residual current is insensitive to wind direction changes.

关 键 词：潮流 欧拉余流 潮流调整 风 胶州湾湾口 

分 类 号：P731.21[天文地球—海洋科学]