Numerical Dynamo Simulations Reproduce Paleomagnetic Field Behavior

Numerical geodynamo simulations capture several features of the spatial and temporal geomagnetic field variability on historical Holocene timescales. However, a recent analysis questioned ability these numerical models to comply with long-term paleomagnetic behavior. Analyzing suite 50 models, we present here first known reproduce salient aspects paleosecular variation time-averaged behavior since 10 Ma. We find that simulated characteristics covary relative dipole strength at core-mantle boundary (dipolarity). Only dominantly driven by compositional convection, an Ekman number (ratio viscous Coriolis forces) lower than 10?3 dipolarity in range 0.34–0.56 can observed This agrees well state-of-the-art statistical represents testable prediction for next generation global model reconstructions.