A Coastal Acoustic Tomography Experiment in the Sanmen Bay,China
The coastal acoustic tomography (CAT) experiment was successfully carried out during September 6 to 9,2009 in the Sanmen Bay near the Taizhou city,China.Seven sets of CAT systems were set up around the bay for mapping the tidal currents at 3-min interval.The 5 kHz sound,phase-modulated by the 10th order M sequence was transmitted from the broadband transducer.The M sequences with different codes were assigned for each of acoustic stations to resolve multi arrivals.During the CAT experiment,a downward looking acoustic Doppler current profiler (ADCP) was deployed from an anchored boat inside the tomography domain and collected the data for comparing with the CAT data.An inverse model is adopted to reconstruct the tidal current distributions using travel-time differences obtained from the reciprocal sound transmission between the paired CAT stations.The inverse results showed the strong northwestward tidal current entered into the tomography site through the two channels at the southeastern part of the bay during the ebb tide.On the other hand,the strong southeastward tidal current flowed back during the flood tide.The horizontal distributions of tidal current calculated by the inverse analysis were in good agreement with that of the ADCP velocity.It is suggested that the CAT is a powerful instrument for continuously mapping the horizontal tidal current structures in coastal regions in China.
Coastal acoustic tomography experiment tidal current inverse analysis Sanmen Bay
Peng Luo Xiao-Hua Zhu Xiaopeng Fan Qingsong Wu Chuanzheng Zhang Guanghong Liao Bo Li
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, 310012, China
国际会议
The 17th Pacific -Asian Marginal Seas Meeting(第十七届太平洋与亚洲边缘海国际会议)
杭州
英文
457-463
2013-04-23（万方平台首次上网日期，不代表论文的发表时间）