| LIAO Guanghong,YANG Chenghao,XU Xiaohua,SHI Xingang,YUAN Yaochu,HUANG Weigen. 2012. Effects of mesoscale eddies on the internal solitary wave propagation. Acta Oceanologica Sinica, (5):26－40 |
| Effects of mesoscale eddies on the internal solitary wave propagation |
| Effects of mesoscale eddies on the internal solitary wave propagation |
| Received:April 04, 2012 Revised:May 14, 2012 |
| DOI：10.1007/s13131-012-0233-9 |
| Key words:mesoscale eddy internal solitary wave variable-coefficient extended Korteweg-de Vries equation wave deformation |
| 中文关键词: mesoscale eddy internal solitary wave variable-coefficient extended Korteweg-de Vries equation wave deformation |
| 基金项目:The National Basic Research Program of China under contract Nos 2011CB403503 and 2012CB955601; the Scientific Research Fund of the Second Institute of Oceanography, the State Oceanic Administration of China under contract Nos JG1009, JT1006 and JT0905 |
| Author Name | Affiliation | E-mail | | LIAO Guanghong | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
College of Information Science and Technology, Ocean University of China, Qingdao 266100, China | liaogh1101@sio.org.cn | | YANG Chenghao | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | XU Xiaohua | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | SHI Xingang | Beijing Branch of China National Offshore Oil Corporation Energy Technology and Services Limited, Beijing 100027, China | | | YUAN Yaochu | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | HUANG Weigen | College of Information Science and Technology, Ocean University of China, Qingdao 266100, China | |
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| Abstract: |
| The mesoscale eddy and internal wave both are phenomena commonly observed in oceans. It is aimed to investigate how the presence of a mesoscale eddy in the ocean affects wave form deformation of the internal solitary wave propagation. An ocean eddy is produced by a quasi-geostrophic model in f-plane, and the one-dimensional nonlinear variable-coefficient extended Korteweg-de Vries (eKdV) equation is used to simulate an internal solitary wave passing through the mesoscale eddy field. The results suggest that the mode structures of the linear internal wave are modified due to the presence of the mesoscale eddy field. A cyclonic eddy and an anticyclonic eddy have different influences on the background environment of the internal solitary wave propagation. The existence of a mesoscale eddy field has almost no prominent impact on the propagation of a smallamplitude internal solitary wave only based on the first mode vertical structure, but the mesoscale eddy background field exerts a considerable influence on the solitary wave propagation if considering high-mode vertical structures. Furthermore, whether an internal solitary wave first passes through anticyclonic eddy or cyclonic eddy, the deformation of wave profiles is different. Many observations of solitary internal waves in the real oceans suggest the formation of the waves. Apart from topography effect, it is shown that the mesoscale eddy background field is also a considerable factor which influences the internal solitary wave propagation and deformation. |
| 中文摘要: |
| The mesoscale eddy and internal wave both are phenomena commonly observed in oceans. It is aimed to investigate how the presence of a mesoscale eddy in the ocean affects wave form deformation of the internal solitary wave propagation. An ocean eddy is produced by a quasi-geostrophic model in f-plane, and the one-dimensional nonlinear variable-coefficient extended Korteweg-de Vries (eKdV) equation is used to simulate an internal solitary wave passing through the mesoscale eddy field. The results suggest that the mode structures of the linear internal wave are modified due to the presence of the mesoscale eddy field. A cyclonic eddy and an anticyclonic eddy have different influences on the background environment of the internal solitary wave propagation. The existence of a mesoscale eddy field has almost no prominent impact on the propagation of a smallamplitude internal solitary wave only based on the first mode vertical structure, but the mesoscale eddy background field exerts a considerable influence on the solitary wave propagation if considering high-mode vertical structures. Furthermore, whether an internal solitary wave first passes through anticyclonic eddy or cyclonic eddy, the deformation of wave profiles is different. Many observations of solitary internal waves in the real oceans suggest the formation of the waves. Apart from topography effect, it is shown that the mesoscale eddy background field is also a considerable factor which influences the internal solitary wave propagation and deformation. |
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