基于船载ADCP观测对罗源湾湾口断面潮流及余流的分析

姚志刚; 鲍献文; 李娜; 李希彬; 宋军; 万凯

基于船载ADCP观测对罗源湾湾口断面潮流及余流的分析

1.
中国海洋大学海洋环境学院, 山东青岛 266100;中国海洋大学物理海洋教育部重点实验室, 山东青岛 266100
2.
中国海洋大学海洋环境学院, 山东青岛 266100
3.
国家海洋局天津海洋环境监测中心站, 天津 300457
4.
国家海洋信息中心, 天津 300171

基金项目: 我国近海海洋综合调查与评价专项(908-01-ST02)。

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出版历程
- 收稿日期: 2012-01-03
- 修回日期: 2012-03-21

Analysis of tidal and residual currents across Kemen Channel based on shipboard ADCP measurements

1.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao, 266100, China;Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China
2.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao, 266100, China
3.
Tianjin Marine Environmental Monitoring Central Station, State Oceanic Adimanistration, Tianjin 300457, China
4.
National Marine Data and Information Service, State Oceanic Adimanistration, Tianjin, 300171, China

摘要

摘要: 基于对罗源湾可门水道的25 h连续走航ADCP观测,成功构建了沿走航断面共12个站位的连续海流时间序列,并对这些站位的潮流、余流以及潮通量等进行了分析。结果表明可门水道内的潮流为正规半日潮流,驻波性质明显,涨潮首先出现在水道中下层而退潮则首先发生在水道上层。水道内的潮流为往复流,水道南部M₂分潮流流速较大,并且其倾角自北向南逐渐增加。此外,水道两端的浅水区域内浅水分潮M₄振幅较显著。可门水道内余流呈现出两层结构,20 m以浅余流沿东北向流出海湾,并且出流的核心位置偏南,而20 m以深的余流沿西南向流入湾内,入流的流核位于偏北的近底层区域。对潮通量的积分计算表明通过可门水道进入罗源湾的潮通量约为4.81×10⁸ m³。
- 走航ADCP /
- 潮流 /
- 余流 /
- 潮通量
Abstract: Based on 25 h shipboard ADCP measurements across Kemen Channel,time series of tidal currents over 12 sites,which distribute evenly along the transect,were constructed to improve our understanding of tidal characteristics and residuals in this region.The tidal currents in Kemen Channel were identified as the regular semidiurnal and reversing tidal flows,with its behavior more like standing waves.Moreover,the flood currents in the lower layers were found to be ahead of that in the upper layers and vice versa for ebb tides.The major of tidal ellipse for M₂ constituent was found to be larger close to the southern side of channel,with its incline also increasing toward the south.The signs of M₄ constituent are also found mainly nearby the end points of this transect,indicating the importance of nonlinearity in tidal dynamics due to the shallower topography.A two-layer structure was found for the residual currents in Kemen Channel,flowing northeastwardly out of the bay in upper 20 m with a further south core position and southwestwardly into the bay in the lowers,with a further north core position.Besides approximate 4.81×10⁸ m³ water exchanges were determined between the Luoyuan Bay and outer seas by the calculation of tidal transports through Kemen Channel.
- shipboard ADCP /
- tidal currents /
- residuals /
- tidal transport

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