| 2016下半年安达曼海潮、余流观测分析 |
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| 引用本文： | 刘延亮,郭景松,王辉武,薛宇欢,KHOKIATTIWONG Somkiat,于卫东.2016下半年安达曼海潮、余流观测分析[J].海洋学报(英文版),2018,37(9):13-21. |
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| 作者姓名： | 刘延亮 郭景松 王辉武 薛宇欢 KHOKIATTIWONG Somkiat 于卫东 |
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| 作者单位： | 国家海洋局第一海洋研究所海洋与气候研究中心, 中国山东青岛, 266061;青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室, 中国山东青岛, 266237,国家海洋局第一海洋研究所海洋与气候研究中心, 中国山东青岛, 266061,国家海洋局第一海洋研究所海洋与气候研究中心, 中国山东青岛, 266061,国家海洋局第一海洋研究所海洋与气候研究中心, 中国山东青岛, 266061,泰国海洋与海岸带资源司普吉海洋生物中心, 泰国普吉, 83000,青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室, 中国山东青岛, 266237 |
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| 基金项目： | The National Key Research and Development Program of China under contract No. 2017YFC1405100; the National Natural Science Foundation of China under contract No. 41406034; the Basic Scientific Research Fund for National Public Institutes of China under contract No. GY0215P05. |
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| 摘 要： | The characteristics of currents and tidal currents in the Andaman Sea(AS) are studied during the second half of2016 using observed data from a moored acoustic Doppler current profiler(ADCP) deployed at 8.6°N, 95.6°E.During the observation period, the mean flow is 5–10 cm/s and largely southward. The root mean square and kinetic energies of the low and high frequency flows, which are divided by a cutoff period of 5 d, are at the same level, indicating their identical importance to the total current. A power spectrum analysis shows that intraseasonal oscillations, a tidal-related semilunar month signal, a semidiurnal tidal signal and periods of 3–4 d are prominent. The barocliny of an eddy kinetic energy is stronger than the mean kinetic energy, both of which are the strongest on the bottom and the weakest at 70 m depth. Residual currents are largely southward(northward) during the summer(winter) monsoon season. Two striking peaks of the southward flow cause the 80 d period of meridional currents. The first peak is part of a large-scale circulation, which enters the AS through the northern channel and exits through the southern channel, and the second peak is part of a local vortex. The 40 d oscillation of the zonal current is forced by geostrophic variations attributed to local and equatorial remote forcing. The tidal current is dominated by semidiurnal constituents, and among these, M2 and N2 are the top two largest major axes. Moreover, astronomical tidal constituents MM and MSF are also significant. Diurnal constituents are weak and shallow water tides are ignorable. The aims are to introduce the new current data observed in the AS and to provide initial insights for the tidal and residual currents in the Andaman Sea.
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| 关 键 词： | 安达曼海 潮流 低频流 |
| 收稿时间： | 2017/11/17 0:00:00 |
The observed tidal and residual currents in the Andaman Sea during the second half of 2016 |
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| LIU Yanliang,GUO Jingsong,WANG Huiwu,XUE Yuhuan,KHOKIATTIWONG Somkiat and YU Weidong.The observed tidal and residual currents in the Andaman Sea during the second half of 2016[J].Acta Oceanologica Sinica,2018,37(9):13-21. |
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| Authors: | LIU Yanliang GUO Jingsong WANG Huiwu XUE Yuhuan KHOKIATTIWONG Somkiat and YU Weidong |
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| Institution: | 1.Center for Ocean and Climate Research, The First Institute of Oceanography,State Oceanic Administration,Qingdao,China;2.Laboratory for Regional Oceanography and Numerical Modeling,Pilot Qingdao National Laboratory for Marine Science and Technology(Qingdao),Qingdao,China;3.Department of Marine and Coastal Resources,Phuket Marine Biological Center,Phuket,Thailand |
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| Abstract: | The characteristics of currents and tidal currents in the Andaman Sea (AS) are studied during the second half of 2016 using observed data from a moored acoustic Doppler current profiler (ADCP) deployed at 8.6°N, 95.6°E. During the observation period, the mean flow is 5–10 cm/s and largely southward. The root mean square and kinetic energies of the low and high frequency flows, which are divided by a cutoff period of 5 d, are at the same level, indicating their identical importance to the total current. A power spectrum analysis shows that intraseasonal oscillations, a tidal-related semilunar month signal, a semidiurnal tidal signal and periods of 3–4 d are prominent. The barocliny of an eddy kinetic energy is stronger than the mean kinetic energy, both of which are the strongest on the bottom and the weakest at 70 m depth. Residual currents are largely southward (northward) during the summer (winter) monsoon season. Two striking peaks of the southward flow cause the 80 d period of meridional currents. The first peak is part of a large-scale circulation, which enters the AS through the northern channel and exits through the southern channel, and the second peak is part of a local vortex. The 40 d oscillation of the zonal current is forced by geostrophic variations attributed to local and equatorial remote forcing. The tidal current is dominated by semidiurnal constituents, and among these, M2 and N2 are the top two largest major axes. Moreover, astronomical tidal constituents MM and MSF are also significant. Diurnal constituents are weak and shallow water tides are ignorable. The aims are to introduce the new current data observed in the AS and to provide initial insights for the tidal and residual currents in the Andaman Sea. |
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| Keywords: | Andaman Sea tidal current low frequency current |
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