单 位：
国家海洋局东海信息中心(国家海洋局东海档案馆);国土资源部海岸带开发与保护重点实验室;河海大学海洋学院
关键词：
长江口及其邻近海域;准调和分析;海流;余流
摘 要：
本文采用短期资料的潮流准调和分析方法对2016年7月长江口及其邻近海域两个连续站的表、中、底3层海流数据进行准调和分析,计算得到两站点的O_1、K_1、M_2、S_2、M_4、MS_4等6个分潮的调和常数,并绘制了各层各分潮的潮流椭圆。计算结果表明:该海域潮流流速由表及底逐渐降低,潮流为旋转流且为顺时针,潮流性质以不正规半日潮为主,分潮流主要为北分量大于东分量,且M_2分潮占绝对优势。余流垂向表现为从上至下逐渐减小,方向指向东北向,且东分量大于北分量。结果可以为同期观测的其他悬浮物分布及物质输运提供动力解释。
译 名：
Quasi-harmonic Analysis on One-day Series Current Data at Two Anchored Stations in the Yangtze River Estuary and Adjacent Area
作 者：
ZHANG Feng;LI Ruijie;SUN Jie;LUO Feng;College of Oceanography, Hohai University;Key Laboratory of Coastal Zone Exploitation and Protection, Ministry of Land and Resources;East Sea Information center,SOA China;College of Harbor Costal and Offshore Engineering, Hohai University;
关键词：
Yangtze River estuary;;Harmonic analysis;;Tidal current;;ADCP
摘 要：
The surface, middle and bottom layers of two consecutive stations during July 2016 in the Yangtze River estuary and its adjacent areas are analyzed using the quasi-harmonic method and short-term data of tidal current. The harmonic coefficients of the six tidal components:O_1、K_1、M_2、S_2、M_(4 )and MS_4 of the two stations are calculated, and the tidal current ellipse of each layer for each tidal component is drawn. It is shown that the tidal current speed in this area decreases gradually with water depth. The tidal current rotates clockwise and is mainly irregular semi-diurnal type. The value of north component is mainly larger than that of the east component, and the M_2 tidal component is the most predominant one. The residual current decreases gradually with water depth, pointing to the northeast, and the value of east component is larger than that of the north component. These results could be used as dynamic explanation for suspended matter distribution and material transport observed in the same period.
