基于WOA23的日本海声道分布特征分析  

Analysis of sound channel distribution characteristics in the Japan Sea based on WOA23

作　　者：邱燕萍 高思宇[1] 陈倩 宋帅[2] 赵亚明 王敬尧 QIU Yanping;GAO Siyu;CHEN Qian;SONG Shuai;ZHAO Yaming;WANG Jingyao(National Marine Data and Information Service,Tianjin 300171,China;Unit 61741 of the Chinese People's Liberation Army,Beijing 100094,China;Naval Submarine Academy,Qingdao 266000,China)

机构地区：[1]国家海洋信息中心,天津300171 [2]中国人民解放军61741部队,北京100094 [3]海军潜艇学院,山东青岛266000

出　　处：《海洋信息技术与应用》2024年第3期141-149,共9页JOURNAL OF MARINE INFORMATION TECHNOLOGY AND APPLICATION

摘　　要：本文基于WOA23温盐剖面数据集,利用声速经验公式,计算日本海的声速剖面,根据声速剖面的特点及声速梯度,诊断提取日本海表面声道及深海声道特征信息,研究表面声道及深海声道的区域分布情况和季节变化特征。结果表明:日本海的表面声道受季节变化影响大且具有明显的区域性分布特征。春夏季节,整个海域几乎无表面声道,秋冬季节,表面声道大幅生成,主要分布在东朝鲜湾和日本海东部边界附近海区,冬季与秋季相比,南北两端的表面声道分布面积减少,但东朝鲜湾以及40°N-50°N之间海区表面声道的分布面积进一步扩大。秋季,表面声道厚度基本小于40 m,冬季,表面声道厚度整体增加,特别是在44°N-50°N之间的海区,大部分表面声道厚度超过100m;表面声道梯度季节变化幅度相对较小,除了秋季鞑靼海峡附近的表面声道梯度大于0.2/s,大部分表面声道的梯度小于0.05/s。深海声道与表面声道相比,受季节变化影响较小,声道效应更加稳定,声道轴深度基本在450m以浅,声道轴声速约为1456~1468m/s,且整体表现呈自东南向西北递减之势。This paper is based on the WOA23 thermohaline profile dataset,and utilizes empirical formulas for sound velocity to calculate the sound speed profile in the Japan Sea.According to the characteristics of sound speed profile and sound speed gradient,the characteristic information of surface sound channel and SOFAR channel in the Japan Sea is diagnosed and extracted,and then study the regional distributions and seasonal characteristics of the surface sound channel and the SOFAR channel.The results indicate that surface sound channels in the Japan Sea are significantly influenced by seasonal variation and exhibit distinct regional distribution characteristics.During the spring and summer,there is almost no surface channel in the entire region.However,during the fall and winter,surface sound channels are substantially generated,which are primarily distributed in the sea area near the eastern border of East Korea Bay and the Japan Sea.Compared with the fall,the distribution area of the surface sound channel decreases at the north and south ends during the winter.However,the distribution area of the surface acoustic channel in the East Korea Bay and the sea area between 40°N and 50°N further expands.In fall,the thickness of the surface channel is basically less than 40 m,while in winter,the thickness of the surface sound channel increases as a whole,especially in the sea area between 44°N and 50°N,where most of the surface sound channel thickness exceeds 100 m.The seasonal variation of the surface channel gradient is relatively small,except for the surface sound channel near the Tartary Strait in autumn,where the gradient is greater than 0.2 s-1.For the majority of the surface sound channels,the gradient is less than 0.05 s-1.Compared to the surface sound channel,the SOFAR channel is less affected by seasonal variations and exhibits a more stable sound channel effect.Moreover,the depth of the axis is generally shallower than 450 m,and the sound speed along the channel axis ranges from 1456 to 1468 m•s-1,gradually

关 键 词：WOA23 日本海 声速剖面 表面声道 深海声道 

分 类 号：P733.2[天文地球—物理海洋学]