Effect of vertical stratification on characteristics and energy of nonlinear internal solitary waves from a numerical model
文献类型：期刊论文
| 作者 | Xie, JS ; Chen, ZW ; Xu, JX ; Cai, SQ |
| 刊名 | COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
 |
| 出版日期 | 2014 |
| 卷号 | 19期号:10页码:3539-3555 |
| 关键词 | Nonlinear internal solitary waves Stratification Numerical model Baroclinic energy South China Sea |
| ISSN号 | 1007-5704 |
| 通讯作者 | caisq@scsio.ac.cn |
| 中文摘要 | A numerical model is set up to study the impact of changes in vertical stratification on the properties of internal solitary waves (ISWs) generated by tidal flow over a ridge. Based on modifications of the observed stratification with a secondary thermocline over a main one in the South China Sea, the effects of five kinds of stratification on the characteristics and energy conversion of ISWs are investigated. In general, the isopycnal undergoing maximum displacement in ISWs is from slightly below the main thermocline. When the stratification below the ridge crest is reduced, the wave amplitude and the number of ISWs in a wave packet increase, while the phase speed, the wave half-width, the sum of ISW kinetic energy (KE) and available potential energy (APE) and the ratio of KE to APE decrease. When the stratification in the upper layer is reduced, the ISW amplitude, the number of ISWs, the phase speed and the sum of KE and APE decrease, while the wave half-width and the ratio of KE to APE increase. If the main thermocline is over the secondary one, the ISW amplitude, the wave half-width, the sum of KE and APE and the ratio of KE to APE increase, while the phase speed reduces. For stratification with two thermoclines, the ISW phase speed increases but the half-width decreases. In addition, the ratio of baroclinic to barotropic energy is found to be between 10% and 40%, and the ratio of ISW KE to APE is between 1.30 and 1.65. It is also shown that the ratio of KE to APE for the stratification with two thermoclines is about 2-6% larger than that for the stratification with only one thermocline. If the thermocline is lowered by about 30 m (0.064 of the total water depth), the ratio of KE to APE reduces by about 10%. (C) 2014 Elsevier B.V. All rights reserved. |
| 学科主题 | Mathematics ; Mechanics ; Physics |
| 收录类别 | SCI |
| 资助信息 | Strategic Priority Research Program of the Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2011CB013701, 2013CB956101]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201302, LTOZZ1304]; NSFC [41025019]; Research Grants Council of the Hong Kong, Special Administrative Region, China [CUHK 402912] |
| 原文出处 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000335968100013 |
| 公开日期 | 2014-12-11 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/10504]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 推荐引用方式 GB/T 7714 | Xie, JS,Chen, ZW,Xu, JX,et al. Effect of vertical stratification on characteristics and energy of nonlinear internal solitary waves from a numerical model[J]. COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION,2014,19(10):3539-3555. |
| APA | Xie, JS,Chen, ZW,Xu, JX,&Cai, SQ.(2014).Effect of vertical stratification on characteristics and energy of nonlinear internal solitary waves from a numerical model.COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION,19(10),3539-3555. |
| MLA | Xie, JS,et al."Effect of vertical stratification on characteristics and energy of nonlinear internal solitary waves from a numerical model".COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION 19.10(2014):3539-3555. |
入库方式： OAI收割
来源：南海海洋研究所
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