采用调和分析方法对东海北部海区1个坐底式潜标连续观测的近两个半月的海流数据进行分析,研究了该站点的潮流空间结构特征以及余流信息。调和分析结果表明,该点以半日潮流为主,潮流类型在40 m以上属不规则半日潮流,40 m以下则属规则半日潮流;该海区的潮流以顺时针旋转为主,潮流量值占海流的比率随深度递增,潮流椭圆要素存在明显的垂向变化。本文研究有助于了解该站点潮流的垂直变化特点,并为潮流数值模拟提供校验依据。
Abstract
Based on the ocean current data observed by a moored buoy in the north of the East China Sea for two and a half months, the special structure characteristics of tidal current and the information of the residual current in the observed area were studied using the harmonic analysis method. The results show that it is dominated by the semidiurnal tide in this area. The type of tidal current in the depth less than 40 m belongs to irregular semidiurnal tide, while it belongs to regular semidiurnal tide in the depth more than 40 m. The tidal current is dominated by clockwise rotation in this area, and the proportion of the tidal current accounted for the ocean current increases with the depth. There are significant vertical variations in the tidal current ellipses elements. This research work will be helpful for understanding the vertical feature of tidal current in this area and the observed data can be provided to calibrate the ocean model on tidal current.
关键词
潮流 /
分潮 /
调和分析 /
余流
Key words
tidal current /
tidal constituent /
harmonic analysis /
residual current
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