| Numerical modeling on the interaction of internal solitary wave with slope-shelf and modal analysis |
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| 作者姓名： | LI Qun XU Zhaoting CHEN Xu YU Jia |
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| 作者单位： | LI Qun1，XU Zhaoting1，CHEN Xu1，YU Jia11.Physical Oceanography Laboratory and Institute of Physical Oceanography，Ocean University of China，Qingdao 266100，China |
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| 摘 要： | On the basis of a nonhydrostatic numerical model,the interaction of internal solitary wave with slope-shelf was studied.The breaking and polarity transformation were analyzed.A "kink" structure,due to shoaling topography and higher nonlinear effect,was found to be generated by the leading wave before breaking.Coherent vortex shedding behind the leading wave was presented.The evolution characteristics of the modal structure were analyzed based on the empirical orthogonal function method.The modal structure was complicated due to the effect of the variable topography,especially when breaking occurred.In the performed experiments,the contributions to the total variance from higher mode jumped from no more than 20% to over 40%.
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| 关 键 词： | 内部孤波 数学模型 经验正交函数 模式分析 |
| 收稿时间： | 2007-03-11 |
| 修稿时间： | 2007-08-07 |
Numerical modeling on the interaction of internal solitary wave with slope-shelf and modal analysis |
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| LI Qun,XU Zhaoting,CHEN Xu,YU Jia.Numerical modeling on the interaction of internal solitary wave with slope-shelf and modal analysis[J].Acta Oceanologica Sinica,2007,26(6):139-149. |
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| Authors: | LI Qun XU Zhaoting CHEN Xu and YU Jia |
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| Institution: | Physical Oceanography Laboratory and Institute of Physical Oceanography, Ocean University of China, Qingdao 266100, China |
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| Abstract: | On the basis of a nonhydrostatic numerical model,the interaction of internal solitary wave with slope-shelf was studied.The breaking and polarity transformation were analyzed.A "kink" structure,due to shoaling topography and higher nonlinear effect,was found to be generated by the leading wave before breaking.Coherent vortex shedding behind the leading wave was presented.The evolution characteristics of the modal structure were analyzed based on the empirical orthogonal function method.The modal structure was complicated due to the effect of the variable topography,especially when breaking occurred.In the performed experiments,the contributions to the total variance from higher mode jumped from no more than 20% to over 40%. |
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| Keywords: | internal solitary wave modal structure empirical orthogonal function |
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