| LIANG Changrong,SHANG Xiaodong,CHEN Guiying. 2019. The vertical heat transport of internal solitary waves over the continental slope in the northern South China Sea. Acta Oceanologica Sinica, 38(3):36－44 |
| The vertical heat transport of internal solitary waves over the continental slope in the northern South China Sea |
| 南海北部陆坡区内孤立波的垂向热量输送 |
| Received:October 20, 2017 |
| DOI：10.1007/s13131-019-1397-3 |
| Key words:internal solitary wave vertical heat transport temperature variation diffusion advection vertical heat flux |
| 中文关键词: 内孤立波 垂向热量输送 温度变化 扩散 对流 垂向热通量 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41676022, 41630970 and 41521005; the National Programme on Global Change and Air-Sea Interaction under contract No. GASI-IPOVAI-04; the Open Project Program of State Key Laboratory of Tropical Oceanography under contract No. LTOZZ1801; the Instrument Developing Project of the Chinese Academy of Sciences under contract No. YZ201432. |
| Author Name | Affiliation | E-mail | | LIANG Changrong | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | SHANG Xiaodong | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | xdshang@scsio.ac.cn | | CHEN Guiying | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | |
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| Abstract: |
| An integrated analysis of internal solitary wave (ISW) observations obtained from two moorings over the continental slope in the northern South China Sea (SCS) leads to an assessment of the vertical heat transport of the ISWs. The clusters of ISW packets are phase-locked to the fortnightly cycle of the semidiurnal tide. The ISWs appear during large semidiurnal tides, and there is a period of 5-6 d when no ISWs are observed. The effect of the ISWs on the continental slope heat budget is observed. The ISWs can modify a local temperature field in which the temperature in the upper layer can be changed by O (100)℃ after the ISWs passed the mooring. Both ISW-induced diffusion and ISW-induced advection contribute to the temperature variation. The estimates imply an average vertical heat flux of 0.01 to 0.1 MW/m2 in the ISWs in the upper 500 m of the water column. The vertical heat transport ranges from 0.56 to 2.83 GJ/m2 with a mean value of 1.63 GJ/m2. The observations suggest that the vertical heat transport is proportional to the maximum vertical displacement. |
| 中文摘要: |
| 利用位于南海北部陆坡区的两个潜标采集的数据，我们分析了内孤立波并估算了内孤立波引起的垂向热量输送。内孤立波群被锁相在半日潮的十四天周期的大小潮内，内孤立波主要出现在强半日潮期间，中间有五到六天时间没有内孤立波出现。我们观测到了内孤立波对陆坡区热量平衡的影响，内孤立波可以改变局地的温度场，使得上层海洋的温度升高O（100）℃，内孤立波引起的扩散和对流都对上层海洋的温度变化有贡献。我们的估算表明在上层500米内孤立波引起的平均垂向热通量为104-105 W/m2，垂向热量输送为0.56-2.83 GJ/m2，平均值可达到1.63 GJ/m2；我们的观测结果表明内孤立波的垂向热量输送与其最大垂向位移成正比。 |
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