基于地波雷达观测资料的烂沙洋海域表层海流特征研究

摘要

This paper analyses the characteristics of sea surface currents and residual currents in coastal area of Rudong County,in JiangSu Province,using long-term ocean observation data obtained by HF Surface Wave Radar.Results show that,the sea surface current direction is generally NW-SE.The maximum monthly flow is between 125～ 150 cm/s so that tidal energy is strong here.The average flood current velocity is between 39～63 cm/s and the average ebb current velocity is between 37～64 cm/s.The surface tide is regular semidiumal and M2 is the most important constituent.The tidal current velocity in east-west is 114cm/s,which exceeds the tidal current velocity value of 62cm/s in north-south.The direction of residual current is west-south,and the direction frequency distribution of hourly residual current shows that southward is the largest,followed by southwestward.%利用江苏如东海域地波雷达获得的长期的海流观测资料对烂沙洋海域表层海流特征和余流特征进行了分析.资料分析结果表明:本海域表层海流总体上呈西北-东南向,海域潮流动力较为强劲,各月最大流速介于125～150 crn/s;各月涨潮平均流速介于39～63 crr/s,落潮平均流速介于37～64 cm/s;表层潮流为正规半日潮,M2分潮为最主要分潮,潮流为往复流;东西向潮流流速大于南北向,东西向潮流最大流速为114 cm/s左右,南北向潮流最大流速为62cm/s左右;该海域余流基本上呈现西向-南向流动,逐时余流方向频率方向为S向或SSW向.