Observing spectral characteristics over a continental shelf and slope in the South China Sea  

作　　者：SHANG Xiaodong XU Chi CHEN Guiying WU Lixin 

机构地区：[1]State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences [2]Institute of Acoustics,Chinese Academy of Sciences

出　　处：《Acta Oceanologica Sinica》2013年第7期29-37,共9页海洋学报（英文版）

基　　金：The National Basic Research Program of China under contract No.2011 CB403505;the National Natural Science Foundation of China under contract Nos U1033002,41276021 and 10972229

摘　　要：Using in situ measurement data from May-June, 1998, and data from the Asian seas international acoustics experiment （ASIAEX） from 2001 in the South China Sea （SCS）, the spectral density function and the dissipa- tion spectrum function are estimated. In the inffa-gravity wave （IGW） band, the power spectra of velocity （u, v, w） are universal functions with respect to characteristic frequencies, which correspond to the peak fre- quencies 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）.Using in situ measurement data from May-June, 1998, and data from the Asian seas international acoustics experiment （ASIAEX） from 2001 in the South China Sea （SCS）, the spectral density function and the dissipa- tion spectrum function are estimated. In the inffa-gravity wave （IGW） band, the power spectra of velocity （u, v, w） are universal functions with respect to characteristic frequencies, which correspond to the peak fre- quencies 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）.

关 键 词：dissipation spectra characteristic frequencies South China Sea 

分 类 号：P736.1[天文地球—海洋地质]