Fig. 3From: Predictions of the geomagnetic secular variation based on the ensemble sequential assimilation of geomagnetic field models by dynamo simulationsRMS forecast a errors \(\varepsilon ^f\) and b uncertainties \(\sigma ^f\) of assimilation runs with different ensemble sizes \(N_e\) and localization \({\mathbf {C}}\). The RMS values are evaluated at the top of the core and truncated to \(\ell =14\)Back to article page