Surface tidal currents in the open sea area to the east of the Zhoushan Islands measured with high frequency surface wave radar

Based on the quasi-harmonic analysis of 11 d vector ocean currents obtained from two high frequency sur- face wave radars located at Zhujiajian Island and Shengshan Island, the spatial distribution characteristics of surface tidal currents in the open sea area to the east of the Zhoushan Islands of...

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Bibliographic Details
Published in:Acta oceanologica Sinica 2013-10, Vol.32 (10), p.5-10
Main Authors: Shen, Zhiben, Wu, Xiongbin, Fei, Yuejun, Xu, Xing’an, Chen, Xiaofeng
Format: Article
Language:English
Subjects:
Antennas
Climatology
Coasts
Constituents
Current ellipses
Direction
Distance
Distribution
Diurnal variations
Earth and Environmental Science
Earth Sciences
Ecology
Ellipses
Engineering Fluid Dynamics
Environmental Chemistry
Fourier analysis
Harmonic analysis
Harmony (Music)
High frequencies
High frequency
Islands
Marine
Marine & Freshwater Sciences
Ocean currents
Oceanography
R&D
Radar
Remote sensing
Research & development
Sea currents
Shallow water
Spatial distribution
Surface water waves
Surface waves
Tidal currents
Topography
残余电流
海域
潮流
电流速度
空间分布特征
舟山群岛
调和分析
高频表面波雷达
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Summary:Based on the quasi-harmonic analysis of 11 d vector ocean currents obtained from two high frequency sur- face wave radars located at Zhujiajian Island and Shengshan Island, the spatial distribution characteristics of surface tidal currents in the open sea area to the east of the Zhoushan Islands of Zhejiang Province, China are studied. The following conclusions are drawn from the analysis： the tidal current pattern in the open sea area to the east of Zhoushan Islands is primarily regular semidiurnal, which is significantly affected by the shallow water constituents. The directions of the major axes of tidal current ellipses of M2 lie approx- imately in the NW-SE direction. With the increasing of distance away from the coast, the directions of the tidal current ellipses gradually shift toward the E-W direction. The tidal currents are mainly reversing cur- rents. The spatial distribution of probable maximum current velocities decreases gradually from northeast to southwest which is basically in accordance with the spatial distribution of measured maximum current velocities. The residual currents near the coast are larger than those far away from the coast. The directions of the residual currents are basically north by east, and the angle to the due north increases gradually with the increasing distance away from the coast. The topography shows a certain impact on the spatial distri- bution of shallow water constituents, the rotation of tidal currents, the probable maximum currents and the residual currents.
ISSN:0253-505X
1869-1099
DOI:10.1007/s13131-013-0359-4