The vertical heat transport of internal solitary waves over the continental slope in the northern South China Sea

作     者：Changrong Liang Xiaodong Shang Guiying Chen 

作者机构：State Key Laboratory of Tropical Oceanography South China Sea Institute of Oceanology Chinese Academy of Sciences University of Chinese Academy of Sciences 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2019年第38卷第3期

页      面：36-44页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：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 

主　　题：internal solitary wave vertical heat transport temperature variation diffusion advection vertical heat flux 

摘      要：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) °C after the ISWs passed the mooring. Both ISWinduced 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/m^2 in the ISWs in the upper 500 m of the water column. The vertical heat transport ranges from 0.56 to 2.83 GJ/m^2 with a mean value of 1.63 GJ/m^2. The observations suggest that the vertical heat transport is proportional to the maximum vertical displacement.