靖海湾春季实测潮流与温盐特征分析

Characteristics Analyses of Tide, Temperature and Salinity of Jinghai Bay in Spring

关键词:  靖海湾  潮流  海温  盐度  余流  调和分析

Key words:  Jinghai Bay  tide  temperature  salinity  residual current  harmonic analysis

摘要:

为了解广东靖海湾潮流、余流特征，采用准调和分析方法对2015年4月靖海湾大潮期实测海流数据资料进行分析，计算得到潮流性质、各分潮潮流特征和余流特征，并预测最大可能海流流速。结果表明：靖海湾以不正规半日潮流为主，潮流运动方式以带旋转的往复流为主，往复流的流向为NE-SW向，旋转流的旋转方向为顺时针；各分潮传播方向一致，都受附近地形的影响；余流受风场影响，以偏东向为主；温盐变化与潮流运动密切相关。靖海湾潮流主要受地形影响，温盐变化特征与潮汐变化一致。

Abstract:

In order to understand the characteristics of tidal current and residual current in Jinghai Bay of Guangdong Province,the quasi-harmonic analysis method was used to analyze the measured current data in the spring tide period of Jinghai Bay in April 2015.The tidal current character,tidal current characteristics and residual current characteristics of each tidal component were calculated,and the maximum possible current velocity was predicted.The results show that the Jinghai Bay is dominated by irregular semi-diurnal tidal current,and the tidal current movement is dominated by reciprocating flow with rotation.The direction of reciprocation current is NW-SE,and the direction of rotating current is clockwise.The propagating direction of each tidal component is consistent,which is affected by the nearby terrain.The residual current is affected by the wind field and mainly eastward.Variations of temperature and salinity are closely related to the tidal current movement.The tidal current in Jinghai Bay is mainly affected by topography,and the variation of temperature and salinity is consistent with that of tide.