海洋中尺度涡建模及其在水声传播影响研究中的应用  

Ocean mesoscale eddy modeling and its application in studying the effect on underwater acoustic propagation

作　　者：李佳讯[1,2] 张韧[1] 陈奕德[1] 金宝刚[1,2] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101 [2]卫星海洋环境动力学国家重点实验室,国家海洋局第二海洋研究所,浙江杭州310012

出　　处：《海洋通报》2011年第1期37-46,共10页Marine Science Bulletin

基　　金：国家重点基础研究计划(973计划)课题(2007CB816003):太平洋西边界流与中国近海的热盐交换

摘　　要：针对海洋中尺度涡对水声传播的影响,利用中尺度涡区的历史水文实测数据提取涡旋强度,空间尺度等中尺度涡特征参数,建立了海洋中尺度涡理论计算模型。运用MMPE水下声场模型仿真试验研究了涡旋性质、强度和位置、声源频率和置放深度对声传播特性的影响。结果表明:暖涡使得会聚区的位置"后退",会聚区宽度增加;冷涡使得会聚区的位置"前移",会聚区宽度减小。涡旋的强度越大,"前移"或"后退"的效应越显著。With regard to the influence of the ocean mesoscale eddy on the underwater acoustic propagation,the historical hydrological observed data in the ocean mesoscale eddy area was used to distill the eddy characteristic parameters,such as the intensity of eddy,and space scale,and a theoretical computation model of ocean mesoscale eddy was established.Furthermore,an underwater acoustic model-MMPE was used to simulate the sound propagation under the influence of the kinds,the intensity and position of ocean eddy and the influence of the frequences and depths of source.The results show that the warm-core eddy will make the assembled area ＂move back＂ and the width of it increase;however the cold-core eddy will make the the assembled area ＂move forward＂ and the width of it decrease.The bigger the intensity of eddy,the more notable the ＂forward ＂or ＂back ＂effect.

关 键 词：MMPE模型 中尺度涡模型 传播损失 

分 类 号：P733.21[天文地球—物理海洋学]