基于海调实测资料的中尺度冷涡的会聚区声传播特征诊断  

Acoustic Propagation in the Convergence Zone of a Cold Mesoscale Eddy Based on Observed Data From Oceanographic Survey

作　　者：鲍森亮 张韧[1] 高飞 洪梅[1] 潘忠良 刘科峰[1] 

机构地区：[1]解放军理工大学气象海洋学院,江苏南京211101 [2]海军海洋测绘研究所仪器设备研究室,天津300061 [3]海军航空兵学院,辽宁葫芦岛125000

出　　处：《海洋科学进展》2016年第4期523-531,共9页Advances in Marine Science

基　　金：国家自然科学基金项目--Argo资料客观分析与三维温盐场重构技术研究(41276088)

摘　　要：海洋中尺度涡能够使声能空间分布不均,进而对水声设备、水下兵器使用和潜艇战造成重大影响。本文基于2014年西太平洋海调中尺度涡观测资料,首先对该涡旋的三维结构特征进行研究,得出此为黑潮延伸体海域典型的气旋式冷涡。然后利用抛物方程水声数值模型仿真研究该中尺度涡对声传播损失的影响。研究表明:中尺度涡引发的海洋声速场水平扰动对水声场空间分布特征造成巨大影响,冷涡使得会聚区的位置前移,宽度减小,增益效能增强;声在中尺度涡边传播时,涡边会聚区较涡心会聚区的位置后退,宽度加大,增益效能减弱。Ocean mesoscale eddies can cause non-uniform distribution of sound energy,which has great impacts on underwater acoustic equipment,weapons and submarine warfare.Based on observational data from oceanographic survey in the West Pacific in 2014,three dimensional characteristics of an eddy is analyzed,showing that this eddy is a typical cold cyclonic eddy in Kuroshio extension.The impact of the eddy on acoustic transmission loss is also simulated with an acoustic model based on parabolic equation,and the results demonstrate that the disturbance of sound field caused by the eddy has great impact on the underwater acoustic field-the convergence zone is shifted forward with decreased width but enhanced gain effect.When sound propagates along the edge of the eddy,the convergence zone is shifted backward with increased width but weakened gain effect.

关 键 词：中尺度冷涡 UMPE模型 会聚区 

分 类 号：P733.2[天文地球—物理海洋学]