| ZHENG Quanan,SONG Y Tony,LIN Hui,HU Xiaomin,MENG Junmin,WANG Dan. 2008. On generation source sites of internal waves in the Luzon Strait. Acta Oceanologica Sinica, (3):38－50 |
| On generation source sites of internal waves in the Luzon Strait |
| On generation source sites of internal waves in the Luzon Strait |
| Received:July 13, 2007 Revised:February 28, 2008 |
| DOI： |
| Key words:ocean internal waves solitary waves Luzon Strait satellite SAR image |
| 中文关键词: ocean internal waves solitary waves Luzon Strait satellite SAR image |
| 基金项目:The ONR under contract Nos N00014-05-1-0328and N00014-05-1-0606;the NASAJPL of USA under contract No.NMO710968(for Zheng);the National Natural Science Foundations of China under contract No.40406009(for Hu) |
| Author Name | Affiliation | E-mail | | ZHENG Quanan | Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland, USA | quau@atmos.umd.edu | | SONG Y Tony | Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA | | | LIN Hui | Institute of Space and Earth Information Sciences, The Chinese University of Hong Kong, Hong Kong, China | | | HU Xiaomin | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | MENG Junmin | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | WANG Dan | Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland, USA
Institute of Space and Earth Information Sciences, The Chinese University of Hong Kong, Hong Kong, China | |
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| Abstract: |
| This effort aims to determine the generation source sites in the Luzon Strait for energetic, long-crest, transbasin internal waves (IW) observed in the northern South China Sea (NSCS).The roles of islands distributed on eastern side of the strait, Kuroshio, submarine ridges, shoaling thermocline, and strait configuration played in the IW generation are examined using the cruise data analysis, satellite data interpretation, and dynamical analysis.The islands and channels on eastern side of the strait are excluded from a list of possible IW source sites owing to their unmatched horizontal dimensions to the scale of IW crest line length, and the relative low Reynolds number.The Kuroshio has a potential to be a radiator for the long-crest IW disturbances, meanwhile, the Kuroshio west (east) wing absorbs the eastward (westward) propagating IW disturbance.Namely, the Kuroshio blockades the outside west-east propagating IW disturbances.The 3-D configuration of the Luzon Strait is characterized by a sudden, more than one order widening of the cross-section areas at the outlets on both sides, providing a favorable condition for IW type initial disturbance formation.In the Luzon Strait, the thermocline is featured by a westward shoaling all the year around, providing the dynamical conditions for the amplitude growth (declination) to the westward (eastward) propagating IW type disturbance.Thus, the west slope of western submarine ridge at the western outlet of the Luzon Strait is a high possibility source sites for energetic, long-crest, transbasin IWs in the NSCS.The interpretation results of satellite SAR images during a 13 a period from 1995 to 2007 provide the convincing evidence for the conclusions. |
| 中文摘要: |
| This effort aims to determine the generation source sites in the Luzon Strait for energetic, long-crest, transbasin internal waves (IW) observed in the northern South China Sea (NSCS).The roles of islands distributed on eastern side of the strait, Kuroshio, submarine ridges, shoaling thermocline, and strait configuration played in the IW generation are examined using the cruise data analysis, satellite data interpretation, and dynamical analysis.The islands and channels on eastern side of the strait are excluded from a list of possible IW source sites owing to their unmatched horizontal dimensions to the scale of IW crest line length, and the relative low Reynolds number.The Kuroshio has a potential to be a radiator for the long-crest IW disturbances, meanwhile, the Kuroshio west (east) wing absorbs the eastward (westward) propagating IW disturbance.Namely, the Kuroshio blockades the outside west-east propagating IW disturbances.The 3-D configuration of the Luzon Strait is characterized by a sudden, more than one order widening of the cross-section areas at the outlets on both sides, providing a favorable condition for IW type initial disturbance formation.In the Luzon Strait, the thermocline is featured by a westward shoaling all the year around, providing the dynamical conditions for the amplitude growth (declination) to the westward (eastward) propagating IW type disturbance.Thus, the west slope of western submarine ridge at the western outlet of the Luzon Strait is a high possibility source sites for energetic, long-crest, transbasin IWs in the NSCS.The interpretation results of satellite SAR images during a 13 a period from 1995 to 2007 provide the convincing evidence for the conclusions. |
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