基于高频地波雷达观测的海南岛西侧潮流特征及其对台风的响应OA北大核心

Based on the surface flow field data from high-frequency radar on the west side of Hainan Island,harmonic analysis and some other methods were employed to investigate the tidal current characteristics and their seasonal variations in this region.The results show significant shallow-water tidal features,with the tidal currents predominantly diurnal.The northern part of the study area exhibits irregular diurnal tidal characteristics,while the southern part displays regular diurnal tidal patterns.The tidal current mainly follows a clockwise reciprocating motion,with the maximum potential tidal current velocity being stronger in the south region than that in the north region.Specifically,the maximum possible tidal current velocity is 1.2-1.8 m/s in the south and 0.25-1 m/s in the north.In addition,the impact of Typhoon"Koguma"on the tidal current was also calculated.The results indicate that the typhoon temporarily weakens the surface tidal current intensity,which generally recovers to normal intensity within seven days.Compared with semi-diurnal tides,this phenomenon is more pronounced in diurnal tides.