东沙群岛西南海域单站潮流及温盐特征分析

AN ANALYSIS ON TIDAL CURRENT TEMPERATUREAND SALINITY AT A MOORING STATION INSOUTHWEST WATERS TODONGSHA ISLANDS

利用东沙群岛西南海域定点站（２０°４１’Ｎ，１１５°４９’Ｅ）３个航次观测的海流、水温资料及同期的温、盐度断面资料，用谱分析方法对该站海流、水温时间序列进行分析。结果表明，该站海流和水温的时间变化都具有明显的全日周期和半日周期波动的特征，潮流为不规则全日潮，主轴顺时针方向旋转。内潮为全日内潮占优，且具有间歇特征。和总流动类似，斜压运动也主要是顺时针方向旋转的。

The time series of current vector and temperature at a mooring stationacquired during the three cruises are analyzed using spectrum methods. The resultsshow that the time series of current vector and temperature at the station havesignificant characteristics of diurnal and semidiurnal periodic wave. The tidal current isirregular diurnal one, the main axis rotates clockwise. The internal tide is primarilydiurnal tide and has intermittence. The baroclinic tide rotates primarily clockwise.