| 中国近海TOPEX/Poseidon卫星测高海平面变化的CPCA分析 |
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| 引用本文： | 王勇,许厚泽,詹金刚.中国近海TOPEX/Poseidon卫星测高海平面变化的CPCA分析[J].测绘学报,2001,30(2):173-178. |
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| 作者姓名： | 王勇 许厚泽 詹金刚 |
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| 作者单位： | 中国科学院测量与地球物理研究所 |
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| 基金项目： | 国家自然科学基金;49634140; |
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| 摘 要： | 用复主成分分析方法，对中国近海TOPEX／Poseidon卫星6年的测高的海平面变化资料进行了分析，给出了中国南海，黄海和东海的海平面变化的空间和时间分布特重征，利用小波方法分析了主要主成分时间变化序列的时－频特征，分析结果表明，主要主成分的空间分布特征与海洋环充相对应，南海，黄海和东海的海平面变化存在显著的年际和2个月的非稳态振荡信号，南海具有较明显的半年周期信号，而黄海和东海的半年周期信号不明显。
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| 关 键 词： | 海平面变化 中国 TOPEX／Poseidon卫星测高 复主成分分析 小波变换 黄海 东海 |
| 文章编号： | 1001-1595(2001)02-0173-06 |
Complex Principal Component Analysis of Sea Level Variability over China Seas from TOPEX/Poseidon Altimetry |
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| WANG Yong,XU Hou ze,ZHAN Jin gang.Complex Principal Component Analysis of Sea Level Variability over China Seas from TOPEX/Poseidon Altimetry[J].Acta Geodaetica et Cartographica Sinica,2001,30(2):173-178. |
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| Authors: | WANG Yong XU Hou ze ZHAN Jin gang |
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| Abstract: | Sea level variability over China seas from TOPEX/Poseidon altimetry for six complete years is analyzed using the complex principal component approach. The spatial and temporal characteristics of sea level variability over the South China Sea, the Huanghai Sea and the East China Sea are presented, respectively. We use wavelet to analyze the time frequency characteristics of the main principal components. The results indicate that the spatial patterns of the principal components correspond to the oceanic currents in China seas. The prominent oscillatory signals in China Seas are the annual and two month cycles. The half year period signals are prominent only in the South China Sea. |
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| Keywords: | sea level variability China seas TOPEX/Poseidon altimetry complex principal component analysis wavelet |
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