基于潜标观测的吕宋海峡以东深海潮流特征研究

旷芳芳; 潘爱军; 张俊鹏; 黄奖; 蔡尚湛

doi:10.12284/hyxb2021031

基于潜标观测的吕宋海峡以东深海潮流特征研究

doi: 10.12284/hyxb2021031

自然资源部第三海洋研究所，福建厦门 361005

基金项目: 大洋“十三五”资源环境类项目（DY135-E2-3-03，DY135-E2-2-02，DY135-E2-5-01）

详细信息

作者简介:
旷芳芳（1985—），女，湖南省衡阳市人，助理研究员，从事海洋环流数值模拟研究。E-mail：kuangfangfang@tio.org.cn

通讯作者:
潘爱军，男，从事物理海洋学研究。E-mail：aijunpan@tio.org.cn

中图分类号: P733.1
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- 文章访问数: 266
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- 被引次数: 0
出版历程
- 收稿日期: 2019-07-26
- 修回日期: 2019-09-24
- 网络出版日期: 2021-01-27
- 刊出日期: 2021-01-25

Characteristics of abyssal tidal currents east of the Luzon Strait: Cast study from in situ observation

Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China

摘要

摘要: 本文使用吕宋海峡以东的潜标观测的长达1年的海流数据，重点对该海域海流的高频波动(潮流)的垂向分布及其时间变化特征进行了分析，结果表明：该海域次表层(100～160 m)的潮动能比中层(1 550 m)和深层(2 560 m)大1～2个数量级，近底层(4 040 m)的潮动能略大于中、深层；次表层为不正规半日潮流，中、深层为不正规全日潮流；各层次潮动能均在夏季(6−9月)和冬季(2−3月)增强，与M₂分潮和K₁分潮在夏季和冬季的增强相对应；各层次海流的高频波动以顺时针旋转为主，次表层海流近惯性周期接近当地理论惯性周期，中、深层略小于当地理论惯性周期。
- 西太平洋 /
- 潜标观测 /
- 深海潮流
Abstract: A submarine mooring system was deployed in the east of the Luzon Strait and the vertical distribution of high frequency (mostly tidal) variations of ocean currents were analyzed in the paper. Several features were revealed that the tidal kinetic energy of the middle (1 550 m) and the deep layers（2 560 m） was one to two orders smaller than that of the subsurface layers (100−160 m) , and slightly smaller than that of the near-bottom layers (4 040 m); the tidal currents were irregular semi-diurnal in the subsurface layers and were irregular diurnal in the middle and deep layers; the tidal kinetic energy was larger in summer (June to September) and winter (February to March) , which mainly caused by enhancement of M₂ and K₁ tidal components in corresponding periods; the high frequency fluctuations in all layers were mainly in clockwise rotation; the near-inertial frequency in the upper layers (middle and deep layers) were close to (slightly smaller than) the local inertial frequency.
- Western Pacific /
- mooring observation /
- tidal currents

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图 1 潜标位置（a）和水深分布（b）

Fig. 1 Location of the mooring (a) and water depth around the mooring (b)

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图 2 通过WOA2013计算出的浮力频率剖面

Fig. 2 Vertical structure of buoyancy frequency calculated from data in WOA2013

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图 3 各层次海流旋转谱分析

CW代表顺时针旋转；CCW代表逆时针旋转

Fig. 3 Rotary spectrum analysis of currents at different depth

CW: clockwise spectrum; CCW: counter clockwise spectrum

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图 4 各层次各分潮的潮流椭圆

黑色为顺时针旋转，红线为逆时针旋转

Fig. 4 Tidal ellipse at different levels

Black line: clockwise rotation; red line: counter clockwise rotation

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图 5 各层次潮动能及其占比

Fig. 5 Tidal kinetic energy and its portion to total kinetic energy at different levels

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图 6 各层次M₂和K₁分潮流长轴的时间序列

Fig. 6 Time series of M₂ and K₁ constituent major axes at different layers

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图 7 各层次潮动能的时间序列及其小波分析

填色图为小波功率谱，曲线图为全球小波谱

Fig. 7 Time series and wavelet analysis of tidal kinetic energy at different levels

The color filled maps represent wavelet power spectrum and the curves represent global wavelet spectrum

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