北部湾北部白龙尾附近海域潮流谱分析  

Spectrum Analysis of Tidal Current in Adjacent Waters of Bailongwei in Northern Beibu Gulf

作　　者：郑斌鑫[1,2] 侍茂崇[3] 廖康明[2] 王璐[3] 何佳[2] 

机构地区：[1]华东师范大学河口海岸学国家重点实验室,上海200062 [2]国家海洋局第三海洋研究所,福建厦门361005 [3]中国海洋大学海洋环境学院,山东青岛266003

出　　处：《海洋科学进展》2015年第1期1-10,共10页Advances in Marine Science

基　　金：福建省自然科学基金--潮动力环境条件下波流输沙数值计算模式研究(2011J05130)

摘　　要：用锚定、座底声学多普勒海流剖面仪(ADCP),对白龙尾开阔水域进行为期1a的分层海流观测,通过最大熵谱分析方法,得出结论:1)日分潮O1,K1和半日分潮M2,S2是白龙尾主要分潮流,半日潮流能量大于日潮流能量;2)在半日潮和全日潮分量中,逆时针运动(f>0)是主要的,并从潮波旋转形态方面给予解释;3)周期为6h左右的浅水分潮,在底层通过显著性检验,表明近底摩擦是浅水分潮生成的主要机制;4)在f>0情况下,周期超过3d的长周期运动(余流)有3个,其中8.3d的长周期运动,在表、中和底层都通过显著性检验,5.2d在中层和底层通过显著性检验,认为主要是潮余流引起的。Maximum entropy spectrum method is employed to analyze the one-year observations of currents in adjacent waters of Bailongwei, which are collected with bottom mounted ADCP. Analysis shows that diurnal currents of O1, K1 and the semi-diurnal currents of M2, S2,are the major tidal currents, and the tidal energy of semi diurnal currents is greater than that of diurnal currents. Among the components of di- urnal tides and the semi-diurnal tides, the anticlockwise components （f〉0） are dominant, which can be well explained with co tidal chart. Shallow water constituent of bottom layer, with period of approximate- ly 6 h, passes significance test, suggesting that bottom friction plays an important role in generating the shallow water constituents. When f〈0, there are three low-frequency currents whose periods are greater than three days： currents with period of 8.3 days are statistically significant in all layers; currents with pe riod of 5.2 days are significant in the middle and bottom layers. These low-frequency currents are consid- ered as tidal residual currents.

关 键 词：北部湾 白龙尾 谱分析 日潮流 半日潮流 

分 类 号：P731.23[天文地球—海洋科学]