广西涠洲岛南岸表层海流特征及机制实测分析  

Observational Analysis of the Surface Current Characteristics and Mec Hanisms off the Southern Coast of Weizhou Island,Guangxi

作　　者：魏春雷[1] 高劲松[2] 曹雪峰[3] 牙韩争 陈波[2] 侍茂崇[3] 

机构地区：[1]国家海洋局北海海洋环境监测中心站,广西北海536000 [2]广西科学院广西近海海洋环境科学重点实验室,广西南宁530007 [3]中国海洋大学海洋与大气学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2017年第4期7-13,共7页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41406044;41566001);广西科技攻关项目(桂科攻1598016-8);广西自然科学基金项目(2015GXNSFCA139023);广西近海海洋环境科学重点实验室开放基金项目(GXKLHY14-01)资助~~

摘　　要：涠洲岛周边海域拥有珍贵的珊瑚礁生态区,但近年来赤潮频发,而针对涠洲岛的海流实测数据研究仅限于1988-1989年的观测结果。因此本文基于涠洲岛南岸2015年1-8月的观测数据分析其表层海流特征有重要意义。本文发现涠洲岛南岸为不正规半日潮流,半日潮流要强于全日潮流且以逆时针旋转运动为主,M2分潮的潮流椭圆长轴最强;潮流呈现季节性变化,其中冬季的潮流最强,夏季其次,春季最弱;冬季分潮的潮流椭圆长轴比夏季大约10cm/s,夏季的分潮潮流椭圆长轴比春季大约1cm/s。虽然冬季潮流最强,但夏季的低频流速最强,约为6.2cm/s,大于冬季的4.5cm/s。对比同时期的季风变化,发现涠洲岛南岸的表层流基本为季风驱动,同时大风江和廉江的冲淡水对该区域流起重要作用。There is very precious coral reef biome around Weizhou Island, but red tides have occurred frequently in the recent year. However, the only long series current data around the Island can bedated back to 1988 and 1989, so it is significant that the features of surface ocean current are analyzed in this study based on the latest observation results from January to August in 2015. The results show that ir- regular semidiurnal tidal current is dominant at the observation station, where the semidiurnal tidal cur- rent energy is stronger than diurnal tidal current. Additionally, the tidal current is performed mainly counter-clockwise, and the long axis of the tidal ellipse of constituent M2 is larger than other tidal con- stituents. The tidal current has seasonal variation, with the strongest, medium and weakest in winter, summer and spring, respectively. On the other hand, the long axis of the tidal ellipse in winter is about 10 cm/sand which is 11 cm/s larger than that in summer and spring, respectively, whereas the residual current in summer （-6.2 cm/s） is larger than that in winter （-4.5 cm/s）. Compared with the wind variation characteristics in the same period, it can be found that the surface residual current off the southern coast of Weizhou Island is affectedby both monsoon wind and the river plume from Dafengjiang and Lianjiang river.

关 键 词：涠洲岛 长时间序列实测数据 海流 季风 表层 

分 类 号：P714.1[天文地球—海洋科学]