基于海床基观测资料的辽东湾东部海流特征研究

基于海床基观测平台,对2010年秋季辽东湾东部海域的海流开展连续观测,并运用谱分析和调和分析方法对该海域的潮流和余流特征进行研究。结果表明:辽东湾东北部潮流属于规则半日潮流;而中东部和东南部两站潮流属于不规则半日潮流。三个站位优势分潮流均为M2分潮,并呈往复流特征;其最大流速介于38~55 cm/s之间,流向为东北-西南,最大流速发生时刻随深度增加而提前。最大可能潮流流速介于91~142 cm/s,流向与岸线走向大致平行。秋季辽东湾东部沿岸余流整体较弱,流向以西南向为主,从北往南三站余流流速分别约为3~5 cm/s,3 cm/s和2~5.5 cm/s。

Study on coastal current characteristics in the eastern area of Liaodong Bay based on the observed data from seabed based platform

Based on the seabed based platform, we continuously observed ocean current, and then analyzed characteristics of tidal and residual currents by means of spectral and harmonic analysis in the east of Liaodong Bay in the autumn of 2010. The results showed that the tidal current in the northeast of Liaodong Bay was a regular semidiurnal one, while the tidal current in the mid-east as well as at the eastern part of the bay mouth was irregular semidiurnal; the dominant tidal current constituent was M2 which flowed rectilinearly in the direction of northeast southwest with the maximum speed of 38~55 cm/s; the moment of maximum M2 tidal current was advanced with depth; the maximum possible velocity of tidal current ranged from 91 cm/s to 142 cm/s, and the direction paralleled to the coastline approximately; and the residual current was feeble in the eastern area of Liaodong Bay and mainly directed southwestward, with the typical velocity of 3~5cm/s, 3 cm/s and 2~5.5 cm/s from north to south, respectively.