| Fan Zhisong,Gao Guoping,Yin Xunqiang,Fan Yu,Wu Wei. 2003. Infragravity waves with internal wave characteristics in the south of the Bohai Sea of China. Acta Oceanologica Sinica, (2):171－178 |
| Infragravity waves with internal wave characteristics in the south of the Bohai Sea of China |
| Infragravity waves with internal wave characteristics in the south of the Bohai Sea of China |
| Received:December 01, 2002 Revised:January 06, 2003 |
| DOI： |
| Key words:Infragravity waves edge waves internal waves vertical shear of horizontal velocity internal mixing |
| 中文关键词: Infragravity waves edge waves internal waves vertical shear of horizontal velocity internal mixing |
| 基金项目:This study was supported by the National "863" Project of China under contract No. 2002AA633120. |
| Author Name | Affiliation | | Fan Zhisong | Marine Environment College, Ocean University of China, Qingdao 266003, China | | Gao Guoping | Marine Environment College, Ocean University of China, Qingdao 266003, China | | Yin Xunqiang | Marine Environment College, Ocean University of China, Qingdao 266003, China | | Fan Yu | Marine Environment College, Ocean University of China, Qingdao 266003, China | | Wu Wei | Marine Environment College, Ocean University of China, Qingdao 266003, China |
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| Abstract: |
| The measurements by using ADCP (500 KH) and CTD were made during August 2000 in the south (37°55'N, 120°25'E) of the Bohai Sea, where the water depth was about 16.5m. The data of horizontal velocity with sampling interval of 2 min in 7 layers were obtained. The power spec-trum analysis of these data indicates that there are very energetic infragrvity waves with a period of about 6 min. The coherence spetrum analysis and the analysis of temporal variation of shear show that these infragravity waves are mainly the free wave model (properties of edge waves), in the meantimethey possess some characteristics of internal waves, which are likely due to the distinctive marine environment in this area. It is speculated on that the instability processes (chiefly shear instability) of sheared stratified tidal flow owing to the effect of sea-floor slope in the coastal area might be the main mechanism generating these infragravity waves. |
| 中文摘要: |
| The measurements by using ADCP (500 KH) and CTD were made during August 2000 in the south (37°55'N, 120°25'E) of the Bohai Sea, where the water depth was about 16.5m. The data of horizontal velocity with sampling interval of 2 min in 7 layers were obtained. The power spec-trum analysis of these data indicates that there are very energetic infragrvity waves with a period of about 6 min. The coherence spetrum analysis and the analysis of temporal variation of shear show that these infragravity waves are mainly the free wave model (properties of edge waves), in the meantimethey possess some characteristics of internal waves, which are likely due to the distinctive marine environment in this area. It is speculated on that the instability processes (chiefly shear instability) of sheared stratified tidal flow owing to the effect of sea-floor slope in the coastal area might be the main mechanism generating these infragravity waves. |
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