印度洋声道的分布特征  

Characteristics of Sound Channel in the Indian Ocean

作　　者：钱潮 吕连港 姜莹 刘宗伟 杨春梅 QIAN Chao;L Lian-gang;JIANG Ying;LIU Zong-wei;YANG Chun-mei(First Institute of Oceanography,MNR,Qingdao 266061,China;Laboratory for Regional Oceanography and Numerical Modeling,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;Key Laboratory of Marine Science and Numerical Modeling,MNR,Qingdao 266061,China)

机构地区：[1]自然资源部第一海洋研究所,山东青岛266061 [2]青岛海洋科学与技术试点国家实验室区域海洋动力学与数值模拟功能实验室,山东青岛266237 [3]自然资源部海洋环境科学与数值模拟重点实验室,山东青岛266061

出　　处：《海洋科学进展》2021年第4期618-625,共8页Advances in Marine Science

基　　金：大洋十三五资源与环境项目——印度洋九十度海岭生态环境监测保护(DY135-E2-4)。

摘　　要：基于2000—2018年的地转海洋学实时观测阵数据,利用声速计算公式得到印度洋海区的声速剖面,并通过声速剖面提取表面声道和深海声道要素,统计分析该海区的表面声道和深海声道分布。结果显示:印度洋的表面声道有着明显的区域性分布和季节性变化,其中印度洋10°S以北海区表面声道深度主要表现为半年周期变化,而印度洋10°S以南海区主要表现为年周期变化;40°S附近海区表面声道深度在9月达到印度洋海区的最大深度;在0~2000 m水深范围内,深海声道普遍存在于10°N以南海区,季节性变化小,印度洋45°S以北海区东部深海声道较西部浅。The data of array for real-time geostrophic oceanography from 2000 to 2018 is used,and the sound speed profiles of the Indian Ocean are obtained by using the sound speed calculation formula.The surface channel and deep channel elements are extracted through the sound speed profiles,and then distributions of the surface channel and deep channel are statistically analyzed.The results show that there are obvious seasonal and regional changes in the surface channel distribution in the Indian Ocean.Surface channel shows a semi-annual cycle change in the sea area to the north of 10°S,and an annual cycle change in the sea area to the south of 10°S.Surface channel in the sea area near 40°S is deepest in the Indian Ocean in September.The deep channel generally exists in the sea area to the south of 10°N and its seasonal variation is weak.To the north of 10°S,the deep channel in the eastern area is shallower than that in the western area.

关 键 词：印度洋 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]