| 地球自转十年尺度变化的分析和预测 |
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| 引用本文： | 赵铭.地球自转十年尺度变化的分析和预测[J].地球物理学报,1991,34(3):329-334. |
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| 作者姓名： | 赵铭 |
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| 作者单位： | 中国科学院上海天文台, 上海 200030 |
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| 摘 要： | 本文用窄带滤波器处理了1800年以来的日长变化（△LOD）的年均值序列,得到在十年尺度上的各频率分量的时变过程.结果表明,仅61年、43年和32年三个分量是较稳定的周期变化,比过去所报告的数量少得多.在此基础上,对未来50年中的△LOD的变化趋势作出预测,认为从70年代初开始的十年尺度上的自转加速过程,可能将持续到本世纪90年代前期,而后将进入一个减速期.
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| 关 键 词： | 地球自转 十年变化 预测 |
| 收稿时间： | 1990-01-22 |
ANALYSIS AND PREDICTION OF THE VARIATION OF EARTH ROTATION RATE IN DECADES SCALE |
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| ZHAO MING.ANALYSIS AND PREDICTION OF THE VARIATION OF EARTH ROTATION RATE IN DECADES SCALE[J].Chinese Journal of Geophysics,1991,34(3):329-334. |
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| Authors: | ZHAO MING |
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| Institution: | Shanghai Astronomical Observatory, Academia Sinica, Shanghai 200030 |
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| Abstract: | Yearly data of the length of day (ALOD) from 1800 were analysed by means of a narrow band filter, and the time-varying components with various frequencies were obtained. It was found that only three components, which are much less than those thought commonly, with periods of 61, 43, and 32 years respectively, were more regular. Based on the analysis, the variation of ALOD in coming fifty years was predicted. |
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| Keywords: | Earth rotation Rate variation Prediction |
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