| 2018年6月上海近海海域潮流特征分析 |
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| 引用本文： | 徐申南,秦涛,潘与佳,裘诚,葛建忠.2018年6月上海近海海域潮流特征分析[J].海洋湖沼通报,2021(1):11-17. |
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| 作者姓名： | 徐申南 秦涛 潘与佳 裘诚 葛建忠 |
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| 作者单位： | 上海市海洋监测预报中心;华东师范大学河口海岸学国家重点实验室 |
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| 基金项目： | 上海市海洋局科研项目(2018-07)资助。 |
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| 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。
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| 关 键 词： | 上海 潮流 调和常数 潮流椭圆 余流 |
Quasi-harmonic Analysis of Tidal Current Data Collected from Anchored Stations in Shanghai Sea Area |
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| XU Shennan,QIN Tao,PAN Yujia,QIU Cheng,GE Jianzhong.Quasi-harmonic Analysis of Tidal Current Data Collected from Anchored Stations in Shanghai Sea Area[J].Transaction of Oceanology and Limnology,2021(1):11-17. |
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| Authors: | XU Shennan QIN Tao PAN Yujia QIU Cheng GE Jianzhong |
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| Institution: | (Shanghai Marine Monitoring and Forecasting Center,Shanghai,200062,China;State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai 200241,China) |
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| Abstract: | 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. |
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| Keywords: | Shanghai tidal current quasi-harmonic analysis tidal ellipse residual current |
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