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DOI	10.1073/pnas.2017696118
	Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment
	Molina-Cardín A.; Dinis L.; Osete M.L.
发表日期	2021
ISSN	00278424
卷号	118 期号:10
英文摘要	We present a simple model for the axial dipole moment (ADM) of the geomagnetic field based on a stochastic differential equation for two coupled particles in a biquadratic potential, subjected to Gaussian random perturbations. This model generates aperiodic reversals and excursions separated by stable polarity periods. The model reproduces the temporal asymmetry of geomagnetic reversals, with slower decaying rates before the reversal and faster growing rates after it. This temporal asymmetry is possible because our model is out of equilibrium. The existence of a thermal imbalance between the two particles sets a preferential sense for the energy flux and renders the process irreversible. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Geomagnetic reversals; Geomagnetism; Paleomagnetism; Stochastic model; Temporal asymmetry
语种	英语
scopus关键词	article; dipole; stochastic model
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180419
作者单位	Department of Physics of the Earth and Astrophysics, Complutense University of Madrid, Madrid, 28040, Spain; Geosciences Institute IGEO (CSIC-UCM), Ciudad Universitaria, Madrid, 28040, Spain; Department of Structure of Matter, Thermal Physics and Electronics, Complutense University of Madrid, Madrid, 28040, Spain; Complex Systems Interdisciplinary Group, Madrid, 28040, Spain
推荐引用方式 GB/T 7714	Molina-Cardín A.,Dinis L.,Osete M.L.. Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment[J],2021,118(10).
APA	Molina-Cardín A.,Dinis L.,&Osete M.L..(2021).Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment.Proceedings of the National Academy of Sciences of the United States of America,118(10).
MLA	Molina-Cardín A.,et al."Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment".Proceedings of the National Academy of Sciences of the United States of America 118.10(2021).