Wavelet Analysis of Geomagnetic Field Intensity for the Past 4000 Years
Wavelet Analysis of Geomagnetic Field Intensity for the Past 4000 Years
复制标题
过去4000年地磁场强度的小波分析
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
P. Frick
中科院分区：
文献类型：
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作者：
K. S. Burakov;D. Galyagin;I. Nachasova;M. Yu;D. D. Sokolov;P. Frick
以保加利亚、格鲁吉亚和中亚地区为例，利用4000年来的地磁资料构造了地磁场强度变化的小波时间谱。在所有三个系列中都自信地确定了1750年的变化。这三个地区这一周期的振荡之间的相移与一波从东向西以vϕ∪+0.2i/yr的速度漂移有关。随着过程特征时间的减少，时间序列之间的相关性减弱。讨论了小波谱中剩余振荡的特征。
The wavelet time spectrum of the geomagnetic field intensity variation was constructed from archeomagnetic data for the past 4000 years by the example of series for Bulgaria, Georgia, and Central Asia. A 1750-year variation is confidently identified in all of the three series. The found phase shifts between the oscillations of this period in the three regions are related to a wave drifting from the east to the west at a rate of v ϕ ∪ +0.2i /yr. The correlation between the time series weakens as the characteristic time of the processes decreases. The character of the remaining oscillations in the wavelet spectra is discussed.