球对称平均场发电机模型中的非对称极性反转、双峰场分布和相干共振
Asymmetric polarity reversals, bimodal field distribution, and coherence resonance in a spherically symmetric mean-field dynamo model
摘要：
使用平均场发电机模型与球对称的螺旋湍流参数α是动态淬火和干扰的额外的噪音，地磁极反转的基本特征被证明是通用的后果发电机行动在附近的例外点的频谱。这个简单的范例模型产生了长时间的恒定极性，这些极性被自加速场衰变中断，导致不对称的极性反转。它显示了最近发现的双峰场分布，并给出了极性持续时间和场强之间的相关性的自然解释。此外，我们发现相干共振的典型特征的持续时间对噪声的依赖性。
英文摘要：
Using a mean-field dynamo model with a spherically symmetric helical turbulence parameter alpha which is dynamically quenched and disturbed by additional noise, the basic features of geomagnetic polarity reversals are shown to be generic consequences of the dynamo action in the vicinity of exceptional points of the spectrum. This simple paradigmatic model yields long periods of constant polarity which are interrupted by self-accelerating field decays leading to asymmetric polarity reversals. It shows the recently discovered bimodal field distribution, and it gives a natural explanation of the correlation between polarity persistence time and field strength. In addition, we find typical features of coherence resonance in the dependence of the persistence time on the noise.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
