摘要
通过2010年春季金普湾内7个海床基连续半个月的海流资料,对金普湾春季海流进行潮流和余流分析。结果表明:(1)湾内潮流性质主要为不正规半日潮流,优势分潮流为M2。水平方向潮流能比的差异变化有由湾口向湾内逐渐减小的趋势;垂直方向上表层潮流能量比仅为中、底层潮流能量比的一半左右。M2分潮在近岸多为往复流、流向基本与岸线平行,湾内中部多为逆时针旋转流。(2)通过欧拉余流可知湾内中部海域以落潮流为主,而湾内靠陆一侧海域以涨潮流为主。斯托克斯余流明显小于欧拉余流,其方向与该站位的优势分潮潮流椭圆方向较为一致。拉格朗日余流的方向、大小基本与欧拉余流一致。湾内北侧水域水体净输移方向有较明显的顺时针旋转的特征,湾内南侧水域水体净输移方向有较弱的逆时针旋转的特征。
This paper based on continuous current data which was collected at 7 Seabed platform stations in Jinpu Bay and lasted half month focuses on the analyses of the spring tidal current and residual current. The results are as follows： Firstly,the tidal current is mostly irregular semidiurnal in Jinpu Bay,and the dominant tidal current component is M2. The rate of the tidal current to the total current in horizontal direction decreased from bay mouth to inner bay, but in vertical direction the surface layer＇s rate is only about half of the medial layer＇s or bottom layer＇s. The direction of the M2 tidal current is parallel to the coastal line in the rectilinear current movement in nearshore,and it is mostly counterclockwise rotating flow in the central bay. Secondly,the Euler residual current shows that the central bay is dominated by ebb current while the inner bay is dominated by flood current. The Stocks residual current is much smaller than Euler residual current,and its direction is similar to this region＇s dominant tidal current component. The direction and magnitude of Lagrange residual current are similar to Euler residual current. In the north of Jinpu Bay,there is remarkable clockwise water transport,while in the south of Jinpu Bay,there isn＇t significant anticlockwise water transport.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2014年第2期220-225,共6页
Marine Environmental Science
基金
国家海洋局海洋公益性项目(200905007)
关键词
金普湾
海床基
潮流
拉格朗日余流
Jinpu Bay
seabed platform
tidal current
lagrange residual current
