基于多波束测深仪的西太平洋声散射层测量  

Research on the sound-scattering layer in the Western Pacific observed with a multibeam sounding system

作　　者：张超[1,2,3,4,5] 吕连港 姜莹[1,2] 杨光兵[1,2] 刘宗伟[1,2] 杨春梅[1,2] ZHANG Chao;LU Lian-gang;JIANG Ying;YANG Guang-bing;LIU Zong-wei;YANG Chun-mei(The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Science and Numerical Modeling, State Oceanic Administration, Qingdao 266061, China;Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266061, China;Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao 266061, China;National Engineering and Technological Research Center of Marine Monitoring Equipment, Qingdao 266061, China)

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋环境科学和数值模拟国家海洋局重点实验室,山东青岛266061 [3]齐鲁工业大学(山东省科学院),山东省科学院海洋仪器仪表研究所,山东青岛266061 [4]山东省海洋环境监测技术重点实验室,山东青岛266061 [5]国家海洋监测设备工程技术研究中心,山东青岛266061

出　　处：《海洋科学》2018年第9期1-9,共9页Marine Sciences

基　　金：国家自然科学基金(41576027);国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目(U1406404).

摘　　要：为了研究西太平洋声散射层的垂向分布特征和日变化规律,分析了多波束测深系统的水体影像数据。观测结果表明,西太平洋存在着两个声散射层,一个声散射层位于0～200 m,另一个声散射层位于500～700 m,两个声散射层散射强度具有明显的日变化特征,上层散射层的散射强度呈现白天弱,夜晚强的特征,而下层散射层的散射强度日变化规律与上层相反,并且发现深散射层的厚度也存在日变化特征;分析了此种方法的优缺点,对以后声散射层的观测分析提供了新的思路。此外,利用同时下放的声速仪(SVP)的温度和深度数据对下放式声学多普勒流速剖面仪(LADCP)的观测结果进行了修正,得到了更为精确的声散射层垂向位置分布。The vertical distribution and diurnal variation of the sound-scattering layers in the West Pacific Ocean were analyzed using data obtained by multibeam water column imagery. Results of the analysis showed the existence of two sound-scattering layers at depths 0-200 m and 500-700 m. Significant diurnal variation was observed in the shallower sound-scattering layer, with weak scattering strength in daytime and stronger in nighttime. This diurnal variation was reversed in the deeper sound-scattering layer, with greater strength in daytime, weaker in nighttime. There is also a diurnal variation in thickness of the deeper sound-scattering layer. The advantages and disadvantages of this method are discussed. A new approach to the observation and analysis of sound-scattering layers is provided. In addition, measurements of lowered acoustic doppler current profilers(LADCP) were corrected by temperature and depth data of a sound velocity profiler(SVP) to observe more accurate vertical profiles of sound-scattering layers.

关 键 词：声散射层 多波束测深系统 下放式声学多普勒流速剖面仪(LADCP) 声速仪(SVP) 西太平洋 

分 类 号：P716[天文地球—海洋科学]