地磁场参数长期变化与日长十年尺度变化相关分析

Correlations Analysis between Secular Variations of Geomagnetic Parameters and Decadal Variations of Day Length

利用地磁模型数据与日长变化资料,计算分析1840～2010年地磁场参数长期变化和日长十年尺度变化相关性.结果表明：日长十年尺度变化超前于地磁场参数长期变化8～11年,日长十年尺度变化与地磁场参数长期变化可能存在同源性.

By using the data of geomagnetic models and day-1 ength variations, the paper calculates and analyzes the correlations from 1840 to 2010 between secular variations of geomagnetic parameters and decadal variations of day length. The calculated results show that the decadal variations of day length ahead of the lseeular variations of geomagnetic parameters by 8- 11 years, moreover, decadal variations of day length and long-tern variations of geomagnetic parameters are probably homologous.