张超^1,2,3,4,5, 吕连港^1,2, 姜莹^1,2, 杨光兵^1,2, 刘宗伟^1,2, 杨春梅^1,2
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

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。
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
DOI：10.11759/hykx20170224001
分类号:P716
基金项目: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）

Research on the sound-scattering layer in the Western Pacific observed with a multibeam sounding system
ZHANG Chao^1,2,3,4,5, LÜ Lian-gang^1,2, JIANG Ying^1,2, YANG Guang-bing^1,2, LIU Zong-wei^1,2, YANG Chun-mei^1,2
1.The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;2.Key Laboratory of Marine Science and Numerical Modeling, State Oceanic Administration, Qingdao 266061, China;3.Institute of Oceanographic Instrumentation, Qilu University of Technology(Shandong Academy of Sciences), Qingdao 266061, China;4.Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao 266061, China;5.National Engineering and Technological Research Center of Marine Monitoring Equipment, Qingdao 266061, China
Abstract:
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.
Key words:sound-scattering layermultibeam sounding systemlowered acoustic doppler current profilers (LADCP)sound velocity profiler (SVP)the Western Pacific





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