作　　者： ; ; ;

机构地区： 广东海洋大学航海学院

出　　处： 《热带海洋学报》 2006年第4期1-5,共5页

摘　　要： 利用在粤西电白附近海域单点系泊浮标站观测的周年水文气象资料,采用Thompson(1983)提出的“4天滤波器”———51G113对海流资料进行低通滤波和低频流分析,并根据观测期间获取的台风和热带低压过程的气象资料,分析热带气旋过程对该海域低频流的影响,初步探讨低频流与风、降水的关系。分析结果表明,该海区的低频流以西向流为主;低频流的流向基本与海面风的方向一致,而最大低频流主要是由热带气旋引起的;沿岸入海径流和热带气旋期间降水量增加所致的沿岸西向地转流,会造成热带气旋发生期间沿岸西向低频流变异。 Based on the annual hydro-meteorological data from a single-point mooring pontoon in the nearby waters of Dianbai, Guangdong province, Thompson＇s ＂four-day wave filter＂ --51G113 method （proposed in 1983） is adopted for low-pass filtration and low frequency current analysis. The meteorological data of typhoon and tropical depression processes during observation period are also gained to analyze the influences of tropical cyclones on the low frequency current in this aera, and to preliminarily discuss the relationship between low frequency current and wind as well as precipitation. The results show that the westward low frequency current is predominant in this sea area; the direction of low frequency current is basically consistent with the sea level wind direction and the maximum low frequency current speed is mainly caused by tropical cyclone. The westward coastal geostrophic current resulting from terrestrial runoff and increasing precipitation can cause the variance of the westward low requency current during tropical cyclones.

关 键 词： 热带气旋 粤西 低频流

领　　域： [天文地球]