摘要
为揭示黑潮延伸体对区域海洋声场的影响及其动力学机制,基于坐底式逆式回声仪(PIES)观测数据,利用地转经验模态方法反演出温盐场,进而得到高分辨率的三维声速场。在此基础上,采用BELLHOP射线模型开展声传播仿真,分析该区域声场的变化特征。研究发现,黑潮延伸体将区域声道轴由860m显著加深至1200m,使得声传播会聚区位置明显后移、宽度增大、深度加深,而对于该区域表面声学层的变化则是以季节性为主导。这些变化是黑潮延伸体引起的温跃层加深、季节性热交换导致的混合层变化所共同作用的结果。研究结果揭示了黑潮延伸体对区域声场的显著调控作用,并为水下探测、通信和环境监测提供了理论基础和技术支撑。
To investigate the impact of the Kuroshio Extension(KE)on regional oceanic acoustic fields and its underlying dynamical mechanisms,this study analyzes data from a Pressure-sensor equipped Inverted Echo Sounder(PIES)array.Using the geostrophic empirical modal method,we reconstructed high-resolution three dimensional sound speed fields by inverting temperature and salinity profiles.Acoustic propagation simulations were then conducted using the BELLHOP ray model to characterize variations in the acoustic field.Key findings reveal that the KE significantly deepens the regional sound channel axis from 860 m to 1200 m,causing pronounced downstream shifts,widening,and deepening of acoustic convergence zones.In contrast,surface acoustic layer variations exhibit dominant seasonal variability.These modifications result from combined effects of KE-induced thermocline deepening,seasonal heat-exchange-driven mixed layer changes.The study elucidates the KE's substantial regulatory role in shaping regional acoustic fields,providing both theoretical foundations and technical support for underwater detection,communication,and environmental monitoring.
作者
邵星栋
徐永生
王黎明
郭平
高海波
SHAO Xingdong;XU Yongsheng;WANG Liming;GUO Ping;AO Haibo(School of Naral Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Laoshan laboratory Qingdao 266071,China;College of Electrical Engineering of Naval University of Engineering,Wuhan 430033,China)
出处
《海洋测绘》
北大核心
2025年第3期46-50,共5页
Hydrographic Surveying and Charting
基金
国家自然科学基金(U22A20587)
汉江国家实验室开放基金项目(KF2024038)
国家民用航天计划(D040305)
崂山实验室科技创新项目(LSKJ202201406-2)。
关键词
海洋声学
黑潮延伸体
坐底式逆式回声仪
表面声学层
声道轴
会聚区
ocean acoustics
the kuroshio extension
bottom-mounted inverted echo sounder
surface acoustic layer
sound channel axis
convergence zone
