摘要
采用短期资料的潮流准调和分析方法,对2018年6月上海近海海域9个站位的同步潮流资料进行分析。分析结果表明:该海域潮流涨落潮不等现象显著,大部分站位的落潮流历时长于涨潮流历时,长江口内(C1~C3)落潮流最大流速远大于涨潮;该海域基本以半日潮为主,同时存在规则半日潮和不规则半日潮,考虑到该海域浅海分潮流具有较大的比重,潮流性质应为不规则半日潮浅海潮流的类型;大部分站位各层的运动形式以往复流为主;大部分站位的余流流速表现为表层>中层>底层,大致呈现自西向东流。
Using the quasi-tidal current method and short term data,the synchronous tidal current data at 9 stations in Shanghai’s offshore waters in June 2018 were analyzed.The results show that there is remarkable flood-ebb time-asymmetry for the tidal current.The ebb tide of most stations last longer than the rising tide,and the maximum flow velocity of the ebb tide currents in the Yangtze River estuary(C1~C3)is much larger than the flood tide;the sea area is basically dominated by semi-diurnal tide.The main semi-diurnal tide and the irregular semi-diurnal tide exist at the same time.Considering that the shallow sea tidal current of the sea area has a large proportion,the tidal current property should be the type of irregular semi-diurnal tidal shallow sea current.The dominant movement form at each station is reflow;the residual flow velocity at most stations is surface>0.6 H layer>bottom layer,which is roughly from west to east.
作者
徐申南
秦涛
潘与佳
裘诚
葛建忠
XU Shennan;QIN Tao;PAN Yujia;QIU Cheng;GE Jianzhong(Shanghai Marine Monitoring and Forecasting Center,Shanghai,200062,China;State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai 200241,China)
出处
《海洋湖沼通报》
CSCD
北大核心
2021年第1期11-17,共7页
Transactions of Oceanology and Limnology
基金
上海市海洋局科研项目(2018-07)资助。
关键词
上海
潮流
调和常数
潮流椭圆
余流
Shanghai
tidal current
quasi-harmonic analysis
tidal ellipse
residual current
