Reconstruct Storm-affected Current Field by Acoustic Tomography at Typhoon Pabuk

摘要：

　　In recent years,the applications of mid-scale or small-scale ocean acoustic tomography at coastal and marginal sea areas have received much attention.Since the shipborne observation at severe weather,such as typhoon,is hard and dangerous,OAT is a good non-invasion monitor method by placing acoustical stations outside the high sea state research areas to prevent damage.In this study,computer simulations of OAT for the 2-D horizontal current field which is influenced by severe tropical storm Pabuk(No.0707) are implemented.Two OAT methods including direct grid-based reciprocal transmission method and Fourier series expanded stream function method are investigated for the 2-D horizontal storm affected current field obtained from OSMAR HF radar during storm Pabuk in 2007(from 22.85o-24oN and 118o-119.15oE in Taiwan Strait).The stream function as a commonly used method is used to reconstruct 2-D horizontal current field by expanding into a Fourier series.The results revealed that the obvious vertical direction current affected by the strong storm makes the stream function invalid and reconstruct error significant.However,the direct grid-based reciprocal transmission method without the assumption of fluid incompressibility can reconstruct the current field at 0.05o high spatial resolution and with high accuracy.The correlation coefficient between original and reconstructed data is higher than 0.8.The study shows the potential application of OAT in storm-affected current observations.

关键词： Ocean acoustic tomography Current field reconstruct Storm-affected Grid based method

作者: Zongxi Zhao Yu Zhang Xiangbai Wu Yan Li

作者单位: College of Ocean and Earth Sciences, Xiamen University, Xiamen, China, 361101; Key Laboratory of Und College of Ocean and Earth Sciences, Xiamen University, Xiamen, China, 361101; Key Laboratory of Und College of Environment and Ecology, Xiamen University, Xiamen, China, 361101 State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361005; College of

会议类型: 国际会议

会议名称: The 17th Pacific -Asian Marginal Seas Meeting(第十七届太平洋与亚洲边缘海国际会议)

会议地点: 杭州

会议语种:英文

页码: 471-476

在线出版日期: 2013-04-23（万方平台首次上网日期，不代表论文的发表时间）