Study on effects of complex bathymetry on the deep acoustic field in Western Pacific Ocean

Author:

Zhou Xiaoyi,Duan Rui,Hao Wang,Gong Guangyu

Abstract

Abstract Seafloor bathymetry has an important effect on acoustic propagation. In a deep water experiment in the Western Pacific in 2020, acoustic field in the reliable acoustic path (RAP) zone, the shadow zone, and the refracted zones were measured with shallow sources and deep receivers. Two important phenomena were observed. First, in the first shadow zone, the signal level (S) changing with source range presents a “W” shape: it sharply decreases by 19 dB after the source just pass the RAP boundary and then increases by 11 dB immediately, which produces the first S trough; after remaining stable for a range interval of 29 km, it drops again by 12 dB and then soars by 16 dB, which produces the second S trough. Secondly, the range spans of refracted zones that expected to be 29 km narrows down to only 13 km. Based on the precisely measured bathymetry and the range-dependent acoustic model-parabolic equation (RAM-PE), the S distribution were reproduced and its characteristics were explained. It was found that rather than the large-scale bathymetry change (e.g, large seamount or break shelf), it is the local bathymetry change that have significant effects on the S distribution.

Publisher

IOP Publishing

Subject

Computer Science Applications,History,Education

Reference13 articles.

1. Three-dimensional bottom diffraction in the North Pacific;Stephen;The Journal of the Acoustical Society of America,2019

2. Influence of the conical seamount on underwater sound propagation in a 3D shallow sea environment;Xiao;Journal of Physics: Conference Series,2020

3. The convergence effect of sound field in a canyon environment in the South China Sea;Zhang;Acta Physics Sinica,2020

4. Three-Dimensional Sound Propagation in the South China Sea with the Presence of Seamount;Li;Journal of Marine Science and Engineering,2021

5. Effects of seafloor topography on underwater acoustic channel;Huang;IOP Conference Series: Earth and Environmental Science,2019

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3