GEOMAGNETIC-FIELD INTENSITY AND REVERSALS DURING THE PAST 4 MILLION YEARS

被引:334
作者
VALET, JP
MEYNADIER, L
机构
[1] Institut de Physique du Globe de Paris, 75252 Paris Cedex 05
关键词
D O I
10.1038/366234a0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
A long and continuous record of the geomagnetic field intensity shows that intensity variations are dominated by two modes. Major episodes of field regeneration prevail on timescales of a few thousand years immediately after most reversals, whereas stable polarity states are characterized by a slow (approximately 0.5 Myr) relaxation process. Reversals can be seen as the consequence of a progressive degradation of the dipole field.
引用
收藏
页码:234 / 238
页数:5
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