| 摘要: |
| 利用多波束测深系统的水体影像数据,对西太平洋声散射层的垂向分布特征和日变化规律进行了分析；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米,另一个声散射层位于500-700米,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,本文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 LADCP 声速仪 西太平洋 |
| DOI：10.11759/hykx20170224001 |
| 分类号:P733.2 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Research on Sound Scattering Layer in the Western Pacific Observed with Multibeam sounding system |
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zhangchao, Lü Lian-gang, JIANG Ying, YANG Guang-bing, LIU Zong-wei, YANG Chun-mei
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The Fist Institute of Oceanography,SOA
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| Abstract: |
| The vertical distribution feature and diurnal variation of sound scattering layers in the West Pacific Ocean were analyzed with the data obtained by Multibeam water column image. The measurements showed the existence of two sound scattering layers at two depth, 0~200m and 500~700m. Significant diurnal variation was observed in the shallower sound scattering layer, with weak strength in daytime and strong in nighttime. While this diurnal variation was reversed in the deeper sound scattering layer, with strong strength in daytime and weak 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 idea about the observation and analysis of sound scattering layers are provided. In addition, the measurements of LADCP are corrected by temperature and depth data of Sound Velocity Profiler (SVP) to observe more accurate vertical profiles of sound scattering layers. |
| Key words: sound scattering layer Multibeam sounding system LADCP Sound Velocity Profiler Western Pacific |