| 赤道西太平洋 1°45'S,156°E 海区的半日内潮波特性 |
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| 引用本文： | 鲍献文,张义钧,孙丽,杜涛,方欣华.赤道西太平洋 1°45''''S,156°E 海区的半日内潮波特性[J].海洋通报(英文版),2006,8(2):12-20. |
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| 作者姓名： | 鲍献文 张义钧 孙丽 杜涛 方欣华 |
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| 摘 要： | 通过对TOGA-COARE期间的一组锚系仪器阵列资料的分析得出:在赤道西太平洋1°45′S,156°E.海域存在显著的半日潮频内波,它的水平波数(波长)、垂向波数、水平传播速度和垂向传播速度分别约为:3.3×10-2 km-1 (210 km),-1.6×10-3 m-1,2.0 m/s,-3.8 cm/s.波形向斜下方传播,亦即波能向斜上方传输.它在观测点西南方生成后,向东北方向传播,到达观测海区.流速矢量旋转谱水平随深度的变化呈马鞍形,低谷及深处的峰所在深度分别与南赤道流及赤道潜流的南边界所在深度大体一致.旋转椭圆主轴方位角随深度变化,在浅层(40 m处)为北偏东30°,到深处(324 m)转为东偏南14°.总体上呈东北方向,表明波来自西南方向.
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| 关 键 词： | 内波 内潮 赤道西太平洋 |
| 收稿时间： | 04 20 2006 12:00AM |
Characteristics of Semi-diurnal Internal Tides in the Western Equatorial Pacific Ocean Around 1°45'S, 156°E |
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| BAO Xianwen,ZHANG Yijun,SUN Li,DU Tao,FANG Xinhua.Characteristics of Semi-diurnal Internal Tides in the Western Equatorial Pacific Ocean Around 1°45''''S, 156°E[J].Marina Science Bulletin,2006,8(2):12-20. |
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| Authors: | BAO Xianwen ZHANG Yijun SUN Li DU Tao FANG Xinhua |
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| Abstract: | The analyses of a data series obtained during TOGA- COARE show the existence of remarkable semi-diurnal internal tides in the western equatorial Pacific Ocean around 1°45′S, 156°E. Some characteristic parameters of the internal tides are vertical wavenumber -1.6×10-3 m-1, horizontal wavenumber (wavelength) 3.3×10-2 km-1 (210 km), vertical propagation speed -3.8 cm/s and horizontal propagation speed 2.0 m/s. The waveforms propagate downwards slantingly, that is, the wave energy transfers upwards slantingly. Depth-distribution of the rotary spectral levels is a saddle-shape. The depths of the trough and the deeper peaks are almost coincident with those of the south boundaries of the South Equatorial Current and the Equatorial Undercurrent, respectively. The mean orientation of the rotary spectral ellipse changes with depth: 30o from north to east at 40 m, and changes into 14o from east to south at 324 m, and generally, it points to northeastward, which indicates that waves come from the southwest. |
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| Keywords: | TOGA-COARE internal waves internal tides western equatorial Pacific Ocean TOGA-COARE |
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