| 琉球群岛附近海域声场分析 |
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| 引用本文： | 代民果,黄大吉,章本照.琉球群岛附近海域声场分析[J].海洋学报,2005,27(1):45-50. |
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| 作者姓名： | 代民果 黄大吉 章本照 |
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| 作者单位： | 1.国家海洋局海洋动力过程与卫星海洋学重点实验室(LOPSO), 浙江, 杭州, 310012;国家海洋局 第二海洋研究所, 浙江, 杭州, 310012;浙江大学流体工程研究所, 浙江, 杭州, 3100271. 国家海洋局海洋动力过程与卫星海洋学重点实验室(LOPSO), 浙江, 杭州, 310012 |
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| 基金项目： | 国家自然科学基金资助项目(40076010)，国家重点基础研究发展规划资助项目(G1999043701). |
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| 摘 要： | 利用美国海军的GDEM(generalized digital environm ental model)数据对琉球群岛附近海域声场进行了研究,分析了该海域声速最小值分布及其对应深度的分布规律;研究了横跨和穿越宫古水道两个断面上上述声场特征的变化,结果表明杭州湾以北的沿岸约30m地形等深线内,冬、春、秋季声速最小值出现在海面,并且有较为稳定的表面声道;夏季闽浙沿岸约30m地形等深线内,声速最小值出现在海面.奄美群岛、冲绳岛东侧130km范围内有很强的海水混合,上升流很明显,导致声速最小值出现的深度在冬夏比在春秋的深400m.
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| 关 键 词： | 琉球群岛 声速剖面 声道轴 声道 表面声道 |
| 文章编号： | 0253-4193(2005)01-0045-06 |
| 收稿时间： | 2003/7/30 0:00:00 |
| 修稿时间： | 2004/2/27 0:00:00 |
Analyses of sound velocity field in sea area by Ryūkyū-guntō |
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| DAI Min-guo,HUANG Da-ji and ZHANG Ben-zhao.Analyses of sound velocity field in sea area by Ryūkyū-guntō[J].Acta Oceanologica Sinica (in Chinese),2005,27(1):45-50. |
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| Authors: | DAI Min-guo HUANG Da-ji and ZHANG Ben-zhao |
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| Institution: | DAI Min-guo~ |
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| Abstract: | The sound velocity field in a sea area near the Ry ky-gunt is stuidied by accessing generalized digital environm entalmodel data base.The distribution rules about the depth corresponding to the minmial sound velocity value are analyzed particularly.Profile a long the Guntu A rchipelago and profile across Amami-shot are studied to find out the above characteristic variations of them.There are series of conclusions.First,there is a sea area about the north of the Hangzhou Bay coaswtise area where the minmial sound velocity value always appears on the sea sur-face in winter,spring and autumn and steady surface sound channel exists.Along the coast of Zhejiag and Fujian Province,China,in the range of 30 m topography isoline,the minmial sound velocity value appears on the sea surface in summer.Second,seawater mixed very strongly and ascendant flow stood out in the 130 km range of the eastern Okinawa-shot.It lead to that the minmial sound velocity depth value in winter and summer is 400 m greater than that in spring and autumn. |
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| Keywords: | Ryky-gunt minmial sound velocity value depth corresponding to minmial sound velocity value deep-water sound channel sound transm ission |
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