Abstract—The ERDA and IGRF-12 geomagnetic field models are used to study the behavior of Earth’s large-scale magnetic field. The unusualness of the modern field’s behavior is studied from the viewpoint of the appearance of a new reversal. Estimates are given for the change in energy of the potential magnetic field on the Earth’s surface and of the liquid core, as well as Joule dissipation in the liquid core over 12 000 years. Both values increase sharply for the modern field, which is associated with an increase in the resolution of observations. Various methods for describing geomagnetic field reversals are considered. It is shown that the estimate for the duration of the reversal may depend on the method. It is demonstrated how erroneous reversal predictions may be, based on short time series, in particular, over the last century.

中文翻译：

---

近一万年来大地磁场的演变

摘要-ERDA和IGRF-12地磁场模型用于研究地球大范围磁场的行为。从出现新逆转的角度研究了现代领域行为的异常性。估计了地球表面和液核上的潜在磁场的能量变化，以及液核在12000年内的焦耳耗散。对于现代领域，这两个值都急剧增加，这与观测分辨率的提高有关。考虑了用于描述地磁场反转的各种方法。结果表明，反转持续时间的估计值可能取决于方法。事实证明，特别是在上个世纪中，基于短时间序列的逆转预测可能会是多么错误。