百余年来地球磁场的长期变化

利用第11代国际地磁参考场模型(IGRF11),计算了自1900年以来地球磁矩、磁矩变化率、地磁北极位置、偏心磁偶极子的位置和地球外部空间的地磁能量等地磁场长期变化特征量,得出了一些重要结论,对加深地磁场长期变化的认识具有理论意义。

The Geomagnetic Secular Variation in Recent One Hundred Years

Using the 11th generation international geomagnetic reference tlem mut~e, k 1,Jr,,l, ~ eu~ geomagnetic secular variation including geomagnetic dipole moment and it＇ s variation rate, the position of geomagnetic north pole, the position of eccentric dipole, and the geomagnetic energy in the earth ＇ s exterior space and so on from 1900 years to now. Some important conclusions are deduced. This paper is useful in theory for understanding geomagnetic secular variation.