| Modal Wave Number Tomography for South China Sea Front |
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| 作者姓名： | 彭临慧 王宁 邱晓芳 田纪伟 |
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| 作者单位： | Physics Department，Ocean University of China，Physics Department，Ocean University of China，Physics Department，Ocean University of China，College of Physical and Environmental Oceanography，Ocean University of China Qingdao 266003，China，Qingdao 266003，China，Qingdao 266003，China，Qingdao 266003，China |
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| 摘 要： | 1 .IntroductionTheSouthChinaSealiestothesoutheastpartoftheChinesecontinent.TheKuroshioflowsbytheeastsideoftheLuzonStraitfromsouthtonorthinwinter ,spring ,andautumn .TheKuroshioaf fectsnearcurrentfieldsandtemperaturefields,changingtheoceanenvironmentparametersandsoundpropagation .Thus ,theoceanacoustictomographytechniqueisofpotentialtolong term ,largescalemonitoringoftheocean .Themodalwavenumbertomographymethod (Rajanetal.,1 987;Frisketal.,1 989)isusedtoobtainthesoundspeedprofileinwatercol…
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Modal Wave Number Tomography for South China Sea Front |
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| PENG Lin-hui a,WANG Ning a QIU Xiao-fang a and TIAN Ji-wei b aPhysics.Modal Wave Number Tomography for South China Sea Front[J].China Ocean Engineering,2003,17(2). |
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| Authors: | PENG Lin-hui a WANG Ning a QIU Xiao-fang a and TIAN Ji-wei b aPhysics |
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| Institution: | PENG Lin-hui a,1,WANG Ning a QIU Xiao-fang a and TIAN Ji-wei b aPhysics Department,Ocean University of China,Qingdao 266003,China bCollege of Physical and Environmental Oceanography,Ocean University of China,Qingdao 266003,China |
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| Abstract: | Monitoring of the South China Sea is always one of the focuses in the field of ocean engineering for its particular geographic position. The modal wave number tomography is proposed for monitoring the front and numerical simulation is performed for the front of the South China Sea. With the empirical orthonormal function (EOF) applied to reduce the parameter search space, the perturbation inversion method is used for inversing sound speed profiles. The 2-D ocean environment used for numerical simulation is selected from the ocean area, located in 20°N, 118°E～20°N, 125°E, near the Luzon Strait in the South China Sea. The ocean environment sound speed distribution in the ocean area under study is obtained from the assimilation of multi-source remote sensing data. The numerical simulation shows that the modal wave number tomography can inverse the average sound speed profile, therefore,it can be used to monitor ocean internal structures such as ocean fronts and eddies which affect sound speed distribution. |
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| Keywords: | front wavenumber tomography monitoring |
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