Coastal Acoustic Tomography Study in China
We have started the study of coastal acoustic tomography (CAT) since 2008,and executed some CAT experiments around the coastal region of China.The first Chinese CAT experiment for mapping the tidal currents near the Zhoushan Island was successfully performed with seven acoustic stations from July 12 to 13,2009.Using CAT,the horizontal distributions of the tidal currents in the tomography domain were calculated by the inverse analysis,in which the travel time differences for sound traveling reciprocally between the station pairs are used as data.The specified tidal current structures,such as the strong east-west oscillation of the tidal current,the branched current and the tidal vortices,were reconstructed as snapshots at the successive tidal phases.The relative vorticity calculated from the inverted current fields served to specify the current structures,such as tidal vortices.Throughout the tidal phases,the divergence from the inverted current showed a positive (negative) distribution in the shallow (deep) region as an overall view.However,the divergence for the entire tomography domain was nearly equal to zero,corresponding to no net transport.This result implies that the observational errors are quite small for the present experiment.This experiment reaffirms that coastal acoustic tomography is an accurate and efficient observational method for continuously mapping tidal current structures in coastal regions that are characterized by heavy shipping traffic and active fishing.
Coastal acoustic tomography field experiment tidal current structure
Xiao-Hua Zhu Noriaki Gohda Arata Kaneko Xiaopeng Fan Chunzheng Zhang Peng Luo Yu Long Yunlong Ma Guanghong Liao Naokazu Taniguchi
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Stat Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima739-8527, Japan
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
418-421
2013-04-23（万方平台首次上网日期，不代表论文的发表时间）