Inferring basic parameters of the geodynamo from sequences of polarity reversals

Simple item page
dc.creatorFischer, Michael
dc.creatorGerbeth, Gunter
dc.creatorGiesecke, Andre
dc.creatorStefani, Frank
dc.date2008-08-25
dc.date.accessioned2026-07-07T13:14:46Z
dc.date.available2026-07-07T13:14:46Z
dc.descriptionThe asymmetric time dependence and various statistical properties of polarity reversals of the Earth's magnetic field are utilized to infer some of the most essential parameters of the geodynamo, among them the effective (turbulent) magnetic diffusivity, the degree of supercriticality, and the relative strength of the periodic forcing which is believed to result from the Milankovic cycle of the Earth's orbit eccentricity. A time-stepped spherically symmetric alpha^2-dynamo model is used as the kernel of an inverse problem solver in form of a downhill simplex method which converges to solutions that yield a stunning correspondence with paleomagnetic data.
dc.description15 pages, 3 figure, submitted to Inverse Problems
dc.identifierhttps://arxiv.org/abs/0808.3310
dc.identifierhttp://arxiv.org/abs/0808.3310
dc.identifierInverse Problems 25, 065011 (2009)
dc.identifierdoi:10.1088/0266-5611/25/6/065011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230277
dc.subjectGeophysics
dc.subjectAstrophysics
dc.subjectFluid Dynamics
dc.titleInferring basic parameters of the geodynamo from sequences of polarity reversals
dc.typetext

Files

Collections

arXiv