日长50天波动的衰减振荡模型

被引：6

作者：

李志安

Clark R.Wilson

机构：

[1] 北京师范大学天文系

[2] Center for Space Research and Geological Sciences University of Texas

[3] Austin

[4] Texas

来源：

天文学报 | 1987年 / 01期

关键词：

衰减振荡; 移动平均; 滑动平均; 时间序列; 波动;

D O I：

10.15940/j.cnki.0001-5245.1987.01.016

中图分类号：

学科分类号：

摘要：

本文用哀减谐振模型讨论了大气角动量共振引起的日长近50天的变化,这种模型由共振周期和品质因子Q来描述其状态.我们用自迥归和自迥归移动平均时间序列模型拟合日长和大气角动量资料序列,得到Q和共振周期的估计值.这种方法得到的周期值约为50天.因为Q值比较小,说明共振度是小的.要想得到精确的周期值大概是不可能的.

引用

页码：29 / 38

页数：10

共 7 条

[1] Discription of global-scale circulation cells in the tropics with a 40-50 day period. Madden R A,Julian P R. Journal of the Atmospheric Sciences . 1972
[2] Current work on the earth‘s rotation at the United Kingdom Meteorological Office. Whysall, K. D. B. H,ide, R.,& Bell, M. J. Proc. of the international conference on earth rotation and the terrestrial re- ference frame . 1985
[3] Time Series Analysis forecasting and control. Box, G. E. P.,& Jenkins, G. M. . 1976
[4] Detection of 40-50 day oscillation in the zonal wind in the tropical Pacific. Madden R D,Julian P. Journal of the Atmospheric Sciences . 1971
[5] The detection of short term fluctuation in the length of day. Feissel, M.,& Gambis, D. C. R. Acad. Sci, ParisB . 1980
[6] Atmospheric angular momentum and the length of day: a common fluctuation with a period near 50 days. Langley, R. B,King, R. W.,& Shapiro, I. I. Nature . 1981
[7] atmospheric angular momentum fluctuations, length of day changes and polar motion. Barnes, R. T. H.,Hide, R. F. R. S.,White, A. A.,& Wilson, C. A. Proc. R. Soc. Lond, A . 1983

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