| 赤道海面高亚季节变化的时空特征 |
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| 引用本文： | 周旭华,钟敏,高布锡,闫昊明.赤道海面高亚季节变化的时空特征[J].测绘学报,2000,29(Z1):86-89. |
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| 作者姓名： | 周旭华 钟敏 高布锡 闫昊明 |
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| 作者单位： | 中国科学院测量与地球物理研究所!湖北武汉430077 |
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| 摘 要： | 本文对赤道海区Topex/Poseidon卫星(1992.10-1998.10)测高资料进行最小二乘法分区拟合，扣除周年和半周年信号之后，再用Vondrak滤波得到30天至150天的亚季节信号。小波振幅谱结果显示了海平面高度变化的亚季节时频时空特性与厄尔尼诺事件存在一定的相关性。
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| 关 键 词： | 亚季节变化 小波振幅谱 厄尔尼诺事件 intraseasonal variation wavelet amplitude spectrum El Nino event |
Time and Space Characteristics from the Intraseasonal Variation of Equatorial Sea-level Height |
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| ZHOU Xu hua,ZHONG Min,GAO Bu xi,YAN Hao ming.Time and Space Characteristics from the Intraseasonal Variation of Equatorial Sea-level Height[J].Acta Geodaetica et Cartographica Sinica,2000,29(Z1):86-89. |
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| Authors: | ZHOU Xu hua ZHONG Min GAO Bu xi YAN Hao ming |
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| Abstract: | Annual,semiannual and the long trend signals of the sea level height are obtained from the Topex/Poseidon satellite altimeter data over the equatorial Pacific by the least square method.Then we remove annual and semiannual signals.Using the Vondrak band-pass filter,we get the intraseasonal variation of the short period in the 30-150 day band.The wavelet-amplitude spectrum shows that the intraseasonal variation of sea-level height is connected with the occurrence of El Nino event。 |
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| Keywords: | intraseasonal variation wavelet amplitude spectrum El Nino event |
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