| 偏心偶极子漂移速率的计算与分析 |
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| 引用本文： | 王月华.偏心偶极子漂移速率的计算与分析[J].地球物理学进展,1996,11(1):104-109. |
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| 作者姓名： | 王月华 |
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| 作者单位： | 中国科学院地球物理研究所 |
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| 摘 要： | 本文根据国际地磁参考场模型ＤＧＲＦ１９４５－１９８５、ＩＧＲＦ１９９０和ＳＶ１９９０－１９９５、计算近期偏心偶极位置和漂移速度,并对西向漂移速度进行了分析,结果表明,１９７０年以前,漂移速度是连续下降,到１９７０最低值,以后,又呈上升趋势,这一现象与地磁长期变化加速度的突然变化即“Ｊｅｒｋ”有很好的相关性。
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| 关 键 词： | 偏心偶极子 西向漂移 漂移速率 座标系统 地磁场 |
CACULATION AND ANALYSIS OF DRIFT RATE OF ECCENTRIC DIPOLE |
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| Wang Yue-hua.CACULATION AND ANALYSIS OF DRIFT RATE OF ECCENTRIC DIPOLE[J].Progress in Geophysics,1996,11(1):104-109. |
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| Authors: | Wang Yue-hua |
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| Abstract: | In this paper, the positions of eccentric dipole and its drift rate were calculated using International Geomagnetic Reference Field models. DGRF 1945-1985. IGRF 1990 and SC1990. The westward drift rate was analysed. Results show that the drift rate continuously decreased from 1943 to 1970, and there was minimum at 1970, and followed a subsequent increase. The phenomenon well correlated with geomagnetic secular variation acceleration which was called "Jerk". |
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| Keywords: | Eccentric dipole Westword drift International geomagnetic reference field |
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