| 东海PN断面黑潮区域海底起伏对声传播的影响 |
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| 引用本文： | 吕连港,乔方利,杨永增,赵宇鹏.东海PN断面黑潮区域海底起伏对声传播的影响[J].海洋科学进展,2003,21(4):432-436. |
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| 作者姓名： | 吕连港 乔方利 杨永增 赵宇鹏 |
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| 作者单位： | 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;国家海洋局,第一海洋研究所,山东,青岛,266061 |
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| 基金项目： | 国家自然科学基金项目——河口、海湾海浪谱反演模型及波谱对颗粒物的搅拌作用(40206003)，国家重点基础研究发展规划项目——中国近海环流形成变异机理、数值预测方法及对环境影响的研究(G1999043811) |
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| 摘 要： | 利用2001年3月东海PN断面“973”调查获得的CTD数据，用数值模拟方法研究了PN断面黑潮区域海底起伏对声传播的影响。由深水区向浅水区传播，随着海底的抬升声线的海底反射和海面反射次数增加，声强衰减更快，限制声传播距离。由浅水区向深水区传播，随着海底降低声线上反转点深度增加，传播一定距离后部分声线不能到达上层水体，于是声强衰减也增快。
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| 关 键 词： | 海底起伏 声传播 传播损失 PN断面 黑潮 |
| 文章编号： | 1671-6647(2003)04-0432-05 |
| 修稿时间： | 2003年9月3日 |
Effect of Sea-bottom Undulation on Sound Propagation on PN Section in the East China Sea Kuroshio Area |
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| LV Lian-gang.Effect of Sea-bottom Undulation on Sound Propagation on PN Section in the East China Sea Kuroshio Area[J].Advances in Marine Science,2003,21(4):432-436. |
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| Authors: | LV Lian-gang |
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| Institution: | LV Lian-gang~ |
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| Abstract: | Based on the CTD data collected on PN section in the East China Sea during March of 2001, the numerical simulation method is used to study the effect of sea-bottom undulation on sound propagation on PN section in the Kuroshio area. In the case travelling from deep water area to shallow water area, the (increasing) sea bottom and surface reflection times of sound ray and the rapid sound intensity attenuation with the rising sea bottom restrict the sound propagation distance. In the case travelling from shallow water area to deep water area, the upper turning point depth of sound ray increases with the descending sea bottom, and a part of sound rays can not reach the upper water after travelling a certain distance so as to speed up the sound intensity attenuation. |
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| Keywords: | sea-bottom undulation sound propagation transmission loss PN section Kuroshio |
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