南麂岛附近海域潮汐和潮流的特征

曾定勇; 倪晓波; 黄大吉

南麂岛附近海域潮汐和潮流的特征

1.
国家海洋局第二海洋研究所, 卫星海洋环境动力学国家重点实验室, 浙江杭州 310012
2.
国家海洋局第二海洋研究所, 卫星海洋环境动力学国家重点实验室, 浙江杭州 310012;浙江大学海洋科学与工程学系, 浙江杭州 310058

基金项目: 国家重点基础研究发展计划(2006CB400603;2011CB409803);浙江省自然科学基金(R504040);国家海洋局青年海洋科学基金(2010233);908专项(908-01-BC06;908-01-BC07)。

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出版历程
- 收稿日期: 2010-07-01
- 修回日期: 2011-03-21

Harmonic analysis of tide and tidal current near Nanji Island, Zhejiang Province

1.
State Key Laboratory of Satellite Ocean Environment Dynamics, The Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
State Key Laboratory of Satellite Ocean Environment Dynamics, The Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Department of Ocean Science and Engineering, Zhejiang University, Hangzhou 310058, China

摘要

摘要: 以2008年冬季在浙江近海南麂岛附近投放的4个底锚系观测的水位和流速资料为依据,分析了潮汐和潮流特征。水位谱分析结果显示半日分潮最显著,全日分潮其次;近岸的浅水分潮比离岸大。水位调和分析结果表明:潮汐类型均为正规半日潮,近岸处的平均潮差大于3 m,最大可能潮差大于6 m,潮汐呈现出显著的低潮日不等和回归潮特征。流速谱分析结果显示半日分潮流最强,全日分潮流其次,且比半日分潮流小得多;近岸浅水分潮流比远离岸显著。流速调和分析结果表明:潮流类型均为正规半日潮流,靠近岸的两个站浅水分潮流较显著;最显著的半日分潮流是M₂分潮流,其最大流速介于0.32~0.48 m/s之间,全日分潮流均很弱,最大流速小于0.06 m/s。M₂分潮流均为逆时针旋转,椭圆率越靠近海底越大;最大分潮流流速分布为中上层最大、表层略小、底层最小;最大分潮流流速方向的垂向变化很小,底层比表层略为偏左;最大分潮流流速到达时间随深度的加深而提前,底层比中上层约提前30 min。潮流椭圆的垂向分布显示这里的半日分潮流以正压潮流为主;日分潮流则表现出很强的斜压性。
- 南麂岛 /
- 潮汐 /
- 潮流
Abstract: Based on the observed water level and current data during the winter of 2008 at four bottom-moorings near Nanji Island, Zhejiang Province, the characteristics of tide and tidal current are investigated with spectral and harmonic analysis. Spectral analysis of the water level shows that the semi-diurnal tides are the most significant constituents, followed by diurnal tides, shallow water tides at inshore area are significant than that in offshore. Harmonic analysis of the water level shows that the tide is regular semi-diurnal tide, the average tidal range is over 3 m and the potential maximum tidal range is greater than 6m at inshore area. The tide has significant low tide daily inequality and tropical tide characteristics. Spectral analysis of the current shows that the semi-diurnal tidal currents are the most significant constituents, followed by diurnal tidal currents which are much weaker than the former, shallow water tidal current at inshore area is much more significant than that in offshore. Harmonic analysis of the current shows that the tidal current is regular semi-diurnal tidal current, the most significant semi-diurnal tidal current constituent is M₂, with its maximum speed of 0.32-0.48 m/s,the most significant diurnal tidal current constituent is K₁, with its maximum speed less than 0.06 m/s. The M₂ tidal current rotates counter-clockwise, with increasing of its ellipticity as approaching to the sea floor. The maximum speed of M₂ tidal current occurs at middle and upper layers, decreases towards the surface and the sea floor. The direction of the maximum tidal current of M₂ does not vary significant with depth, except that the direction deviates slightly to the left near the sea floor. The timing of the maximum current advances when approaching to the sea floor, with about 30 minutes ahead at the bottom layer than the above layer. The semidiurnal tidal current is barotropic dominate with vertical homogeneous, while the diurnal tidal current shows a baroclinic property with a strong vertical variation.
- Nanji Island /
- tide /
- tidal current

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参考文献(17)

林炳尧,曹颖.杭州湾潮汐特征分析[J].河口与海岸工程,2000(2):16-25.

陈耕心,李伯根,许卫忆. 乐清湾潮汐特征及对潮滩沉积作用的影响[J].东海海洋,1992,10(1):1-9.

曹欣中,唐龙妹,张月秀. 象山港水文特征及纳污能力的分析[J].东海海洋,1995,13(1):10-19.

顾圣华. 杭州湾芦潮港水域潮流特征分析[J].上海水利,2000(1):37-40.

陈德春,何蘅. 浅析台州湾-椒江河口水文特征[J].水文,1998(5):52-54.

陈倩,黄大吉,章本照,等.浙江近海潮汐的特征[J].东海海洋,2003,21(2):1-12.

陈倩,黄大吉,章本照,等.浙江近海潮流和余流的特征[J].东海海洋,2003,21(4):1-14.

章渭林. 浙闽近海潮波传播类型分析[J].海洋通报,1993,12(1):19-24.

FANG Guohong. Tide and tidal current charts for the marginal seas adjacent to China[J].C J of Oceanology and Limnology,1986,4(1):1-16.

PAWLOWICZ R,BEARDSLEY B,LENTZ S.Classical tidal harmonic analysis including error estimates in MATLAB using T_TIDE[J]. Computers and Geosciences,2002,28:929-937.

陈宗镛. 潮汐学[M].北京:科学出版社,1980:301.

黄祖珂,黄磊.潮汐原理与计算[M].青岛:中国海洋大学出版社,2005:235.

中华人民共和国交通部.港口工程技术规范(上册)[S].北京:人民交通出版社,1987.

方国洪.潮流垂直结构的基本特征——理论和观测的比较[J].海洋科学,1984(3):1-11.

李身铎.长江口潮流的垂直结构[J].海洋与湖沼,1985,16(4):261-273.

FANG G H, ICHIYE T.On the vertical structure of tidal currents in a homogeneous sea[J].Geophy J R Astr Soc, 1983(73):65-82.

叶安乐.分潮流最大流速发生时刻随深度变化的特征[J].海洋通报,1984,3(1):1-8.

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