广西科学2018，Vol.25Issue(1)：36-42,7.DOI:10.13656/j.cnki.gxkx.20180211.001
“纳沙”台风期间广西白龙尾近岸海域余流特征及产生机制
Characteristics and Formation Mechanism of the Residual Current in the Coastal Waters of Bailongwei during the Nesat Typhoon
摘要
Abstract
[Objective]To study the characteristics and formation mechanism of the residual current in the coastal waters of Bailongwei during the Nesat Typhoon can provide theoretical basis for the deformation and strengthening of the offshore residual current under the effect of typhoon.[Methods]According to the high resolution continuous current profile data measured on S1 station during the "Nesat" typhoon,which was located in the coastal area of the Guangxi Bailongwei,the characteristics of the measured current velocity and direction at each layer and the characteristics of the residual current of the observation point were studied.[Results]In the period of no typhoon,the residual current velocity at each layer was generally less than 10 cm/s.The average residual current velocities of the surface layer,the middle layer and the bottom layer were 5.7 cm/s,3.5 cm/s and 3.1 cm/s,respectively.The maximum residual current velocity of the surface layer was 16.3 cm/s,the middle layer was 14.2 cm/s and the bottom layer was 12.0 cm/s.During the landing of the typhoon,the maximum velocities of the residual current were 39.7 cm/s at surface layer,32.4 cm/s at the middle layer and 20.7 cm/s at the bottom layer.The maximum velocity was up to 60.9 cm/s,which was more than three times over the normal value.With the increasing of the water depth,the effect of the wind stress on the water reduced rapidly,the maximum velocity of the low frequency current was only 31.1 cm/s at the bottom layer.The classification diagrams of the residual current velocity showed that the direction of the residual current was WSW direction at the surface layer and the direction below the middle layer was NE without typhoon,while the residual current direction was SW during typhoon.[Conclusion]The variation of the velocity and direction of the residual current was closely related to the wind,the compensation current and the terrain.关键词
余流特征/产生机制/白龙尾海域Key words
residual current/formation mechanism/Bailongwei waters分类
海洋科学引用本文复制引用
陈波,陈宪云,侍茂崇,徐智昕,牙韩争..“纳沙”台风期间广西白龙尾近岸海域余流特征及产生机制[J].广西科学,2018,25(1):36-42,7.基金项目
国家自然科学基金项目(41576024)和广西重点研发计划项目(桂科AB16380282)资助. （41576024）
