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| 中国近海声速剖面的模态特征 | |
| 引用本文： | 张旭,张永刚,黄飞灵,李坚.中国近海声速剖面的模态特征[J].海洋通报,2010,29(1). |
| 作者姓名： | 张旭 张永刚 黄飞灵 李坚 |
| 作者单位： | 1. 海军大连舰艇学院军事海洋系,辽宁,大连,116018 2. 91991部队司令部航保科,浙江,舟山,316041 3. 91257部队司令部航保科,浙江,舟山,316000 |
| 摘 要： | 利用WOA05数据集提供的气候态声速场数据,通过模糊C-均值聚类分析,得到了中国近海声速剖面模态特征的区域性分布和季节性变化。结果表明,中国近海的声速剖面结构可分为深海型(D型)、浅海型(S型)和过渡型(T型)三个基本类型。深海型剖面为"季节性跃层/正梯度+主跃层+深海声道+深海正梯度"结构,南海和菲律宾海因所属水系不同呈现出明显差异;浅海型剖面季节性变化强烈,冬季为正梯度或均匀型结构,其它季节为"混合层+季节性跃层+下均匀层"结构,负梯度强度与季节性跃层的变化有关,在夏季达到最强;过渡型剖面形态与邻近的深海型上层结构类似,但因受地形制约产生与深海型不同的声传播特征。海面太阳辐射、海洋环流、混合层以及水团配置的季节性变化导致的温盐场空间分布差异是造成不同海区、不同季节声场速剖面结构差异的根本原因。 |
| 关 键 词： | 声速剖面 中国近海 模糊C-均值聚类 WOA05 |
Mode characteristics of sound speed profile in sea areas of China |
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| ZHANG Xu,ZHANG Yong-gang,HUANG Fei-ling,LI Jian.Mode characteristics of sound speed profile in sea areas of China[J].Marine Science Bulletin,2010,29(1). | |
| Authors: | ZHANG Xu ZHANG Yong-gang HUANG Fei-ling LI Jian |
| Institution: | 1.Department of Military Oceanography;Dalian Naval Academy;Dalian 116018;China;2.Headquarters of Unit 91991;Zhoushan 316041;3.Headquarters of Unit 91257;Zhoushan 316000;China |
| Abstract: | Based on WOA05 database,sound speed profiles (SSPs) have been analyzed by cluster fuzzy c-means algorithms,and their typical regional mode characteristics and seasonal variations were obtained.The result shows that there are three basic types of sound speed profile structure in sea areas of China:D-type (deep sea),S-type (shallow sea) and T-type (transitional areas).SSPs of D-type have a structure of 'seasonal spring layer/positive grads layer + main spring layer + deep channel + deep positive grads layer',... |
| Keywords: | WOA05 sound speed profile (SSP) sea areas of China cluster fuzzy c-means WOA05 |
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