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

YAO Zhigang; BAO Xianwen; LI Na; LI Xibin; SONG Jun; WAN Kai

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YAO Zhigang, BAO Xianwen, LI Na, LI Xibin, SONG Jun, WAN Kai. Analysis of tidal and residual currents across Kemen Channel based on shipboard ADCP measurements[J]. Haiyang Xuebao, 2012, 34(6): 1-10.

Citation:

YAO Zhigang, BAO Xianwen, LI Na, LI Xibin, SONG Jun, WAN Kai. Analysis of tidal and residual currents across Kemen Channel based on shipboard ADCP measurements[J]. Haiyang Xuebao, 2012, 34(6): 1-10.

YAO Zhigang, BAO Xianwen, LI Na, LI Xibin, SONG Jun, WAN Kai. Analysis of tidal and residual currents across Kemen Channel based on shipboard ADCP measurements[J]. Haiyang Xuebao, 2012, 34(6): 1-10.

Citation:

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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

Received Date: 2012-01-03
Rev Recd Date: 2012-03-21

Abstract

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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References(23)

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