RT Journal Article
T1 Simple stochastic model for geomagnetic excursions and reversals reproduces the temporal asymmetry of the axial dipole moment.
A1 Molina Cardín, Alberto
A1 Dinis Vizcaíno, Luis Ignacio
A1 Osete López, María Luisa
AB 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.
PB United States National Academy of Sciences (United States)
SN 0027-8424
YR 2021
FD 2021-03-01
LK https://hdl.handle.net/20.500.14352/112969
UL https://hdl.handle.net/20.500.14352/112969
LA eng
NO Molina-Cardín, Alberto, 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, vol. 118, n.o 10, marzo de 2021, p. e2017696118, https://doi.org/10.1073/pnas.2017696118
NO Agencia Estatal de Investigación
NO Ministerio de Ciencia, Innovación y Universidades
NO FEDER
DS Docta Complutense
RD 13 abr 2025