Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment

doi:10.1073/pnas.2017696118

GSTDTAP > 地球科学

DOI	10.1073/pnas.2017696118
	Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment
	Alberto Molina-Cardín; Luis Dinis; María Luisa Osete
	2021-03-09
发表期刊	Proceedings of the National Academy of Science
出版年	2021
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.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/316949
专题	地球科学
推荐引用方式 GB/T 7714	Alberto Molina-Cardín,Luis Dinis,María Luisa Osete. Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment[J]. Proceedings of the National Academy of Science,2021.
APA	Alberto Molina-Cardín,Luis Dinis,&María Luisa Osete.(2021).Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment.Proceedings of the National Academy of Science.
MLA	Alberto Molina-Cardín,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 Science (2021).