| 中国近海海平面季节尺度变化的时频分析 |
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| 引用本文： | 詹金刚,王勇,柳林涛.中国近海海平面季节尺度变化的时频分析[J].地球物理学报,2003,46(1):36-41. |
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| 作者姓名： | 詹金刚 王勇 柳林涛 |
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| 作者单位： | 中国科学院测量与地球物理研究所，武汉 430077 |
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| 基金项目： | 国家自然科学基金项目 (40 1 740 0 6,496341 4 0 ) . |
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| 摘 要： | 用连续小波变换方法，对中国近海验潮站资料(20～30a)和Topex/Poseidon卫星测高海平面变化资料(1992年10月～1998年9月)进行分析，给出了南海、黄海和东海海平面变化在季节尺度上的时频特征. 结果表明，黄海和东海的海平面变化较相似，存在显著的周年和准双月的振荡信号；南海具有较明显的周年信号和较弱的半年周期信号；浅海区和深海区的海平面季节尺度变化在周期性与强度上存在明显差异.
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| 关 键 词： | 小波变换 海平面变化 中国近海 卫星测高 验潮站 |
| 文章编号： | 0001-5733(2003)01-36-06 |
| 收稿时间： | 2001-5-28 |
| 修稿时间： | 2002-2-9 |
TIME-FREQUENCY ANALYSIS OF THE INTER-SEASONAL VARIATIONS OF CHINA-NEIGHBORING SEAS LEVEL |
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| ZHAN JINGANG.TIME-FREQUENCY ANALYSIS OF THE INTER-SEASONAL VARIATIONS OF CHINA-NEIGHBORING SEAS LEVEL[J].Chinese Journal of Geophysics,2003,46(1):36-41. |
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| Authors: | ZHAN JINGANG |
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| Institution: | Institute of Geodesy and Geophysics, Chinese Academy of Sciences，Wuhan 430077, China |
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| Abstract: | The fast Fourier Transform (FFT) and the Continuous Wavelet Transform (CWT) are used to analyze the basic features of inter-seasonal variations of the sea level in China Seas from tide gauge records and Topex/Poseidon altimetry data (from October of 1992 to September of 1998). The results indicate that the sea level variations over the Yellow Sea and the East China Sea are similar, which have two strong oscillatory signals with the periods of annual and about 60 days, annual and semiannual signals are prominent in the South China Sea. The sea level variations show significant differences at inter-seasonal scales between shallow sea and deep-sea. |
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| Keywords: | Wavelet analysis Sea level variations China seas Satellite altimeter Tide gauge |
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