北大西洋深海声速类型区划及会聚区特征分析  

Zoning of sound speed profile types and characteristics of convergence zone in the deep North Atlantic Ocean

作　　者：杨帆[1] 王华[2] 高文典 孟小嵩 刘云龙[1] YANG Fan;WANG Hua;GAO Wen-dian;MENG Xiao-song;LIU Yun-long(North China Sea and Environmental Monitoring Center,State Oceanic Administration,Shandong Provincial Key Laboratory of Marine Ecology and Environment&Disaster Prevention and Mitigation,Qingdao 266000 China;PLA Dalian Naval Academy,Dalian 116018 China;North China Sea Standardization and Metrology Center,Qingdao 266000 China)

机构地区：[1]国家海洋局北海环境监测中心,山东省海洋生态环境与防灾减灾重点实验室,山东青岛266000 [2]海军大连舰艇学院,辽宁大连116018 [3]国家海洋局北海标准计量中心,山东青岛266000

出　　处：《海洋预报》2021年第6期103-110,共8页Marine Forecasts

基　　金：国家重点研发计划(2018YFC1407602-02)。

摘　　要：利用WOA13数据集,应用谱系聚类方法划分北大西洋的类型,并应用模糊C-均值聚类法将声速剖面进行分类,给出各类型在不同季节分布的区域和典型声速剖面结构。应用BELLHOP模式分析了各种类型第一辐合带的特征,得出在北大西洋深海声速剖面分为6种类型:亚北极区型、北大西洋暖流区型、亚速尔—加纳利流区型、亚热带区型、热带区Ⅰ型、热带区Ⅱ型,这些类型总体呈纬向分布,与北大西洋海流的分布密切相关,除亚北极区型分布范围无季节变化外,其他类型均具有季节变化,且各类型最明显的特征是声道轴深度随纬度变化。WOA13 data set is used and the hierarchical clustering method is applied to classify the types of the North Atlantic Ocean.Moreover,the Fuzzy C-means Clustering method is adopted to classify the sound speed profile,and calculate the distribution area of each type in different seasons and typical sound speed profile structure.Meanwhile,this paper uses the BELLHOP model to analyze the characteristics of the first convergence zone of each type in this paper,and concludes that the sound speed profile in the deep North Atlantic can be divided into six types:subarctic zone type,North Atlantic warm current zone type,Azores-Canary current zone type,subtropics zone type,tropic zone type I,tropic zone typeⅡ.These types are generally distributed along the zonal direction and are closely related to the distribution of the North Atlantic current.The distribution range of each type shows seasonal variation except the subarctic zone type,and the most obvious feature of each type is that the depth of the sound channel axis varies with latitude.

关 键 词：北大西洋 声速剖面 模糊C-均值聚类 会聚区 

分 类 号：P733.2[天文地球—物理海洋学]