Japan Geoscience Union Meeting 2016

Presentation information


Symbol P (Space and Planetary Sciences) » P-PS Planetary Sciences

[P-PS11] Planetary Sciences

Thu. May 26, 2016 1:45 PM - 3:15 PM 104 (1F)

Convener:*Keiko Hamano(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Shunichi Kamata(Creative Research Institution, Hokkaido University), Chair:Hirotomo Noda(National Astronomical Observatory of Japan), Shunichi Kamata(Creative Research Institution, Hokkaido University)

3:00 PM - 3:15 PM

[PPS11-30] High dimensional coupled spin model for polarity reversals

*Ariyoshi Kunitomo1, Akika Nakamichi2, Tetsuya Hara1 (1.Kyoto Sangyo University, 2.Koyama Astronomical Observatory, Kyoto Sangyo University)

Keywords:geomagnetism, solar magnetism, coupled-spin

Recently, the macro spin model has been suggested for polarity reversal (Nakamichi et al. 2012, Mori et al. 2013). This is the idea that geomagnetism is described by interaction with many local dynamo elements (called macro-spins). This model can reproduce many features of geomagnetism and the solar magnetism; power spectrum, average time of polarity flipping, randomness and periodicity of polarity reversals.We study this model to become higher dimensional model. In this result, our model becomes possible for many things which are not treated in previous study, for example reproduce migration of the North (or South) Magnetic Pole, comparison with observed data of magnetic field distributions expressed in two directions.In addition, we investigate some distribution function that the pole migration followed and make a comparison with previous study, e.g. Lévy distribution (Carbone et al., 2006) and log-normal distribution (Ryan & Sarson, 2007).