| SHANG Xiaodong,XU Chi,CHEN Guiying,WU Lixin. 2013. Observing spectral characteristics over a continental shelf and slope in the South China Sea. Acta Oceanologica Sinica, 32(7):29－37 |
| Observing spectral characteristics over a continental shelf and slope in the South China Sea |
| Observing spectral characteristics over a continental shelf and slope in the South China Sea |
| Received:March 02, 2012 Revised:November 15, 2012 |
| DOI：10.1007/s13131-013-0329-x |
| Key words:dissipation spectra characteristic frequencies South China Sea |
| 中文关键词: dissipation spectra characteristic frequencies South China Sea |
| 基金项目:The National Basic Research Program of China under contract No. 2011CB403505; the National Natural Science Foundation of China under contract Nos U1033002, 41276021 and 10972229. |
| Author Name | Affiliation | E-mail | | SHANG Xiaodong | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | XU Chi | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | CHEN Guiying | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | gychen@scsio.ac.cn | | WU Lixin | Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China | |
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| Abstract: |
| Using in situmeasurement data fromMay-June, 1998, and data fromthe Asian seas international acoustics experiment (ASIAEX) from2001 in the South China Sea (SCS), the spectral density function and the dissipation spectrum function are estimated. In the infra-gravity wave (IGW) band, the power spectra of velocity (u, v, w) are universal functionswith respect to characteristic frequencies, which correspond to the peak frequencies of the dissipation spectrum (PFDS). This suggests that high-frequency internal waves in the IGW band have similar dynamical characteristics. In addition, the evolution of these characteristic frequencies is explored and its highest value is 8.8 cph (cycles per hour, 1 cph=2.778×10-3 Hz). |
| 中文摘要: |
| Using in situmeasurement data fromMay-June, 1998, and data fromthe Asian seas international acoustics experiment (ASIAEX) from2001 in the South China Sea (SCS), the spectral density function and the dissipation spectrum function are estimated. In the infra-gravity wave (IGW) band, the power spectra of velocity (u, v, w) are universal functionswith respect to characteristic frequencies, which correspond to the peak frequencies of the dissipation spectrum (PFDS). This suggests that high-frequency internal waves in the IGW band have similar dynamical characteristics. In addition, the evolution of these characteristic frequencies is explored and its highest value is 8.8 cph (cycles per hour, 1 cph=2.778×10-3 Hz). |
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