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Fig. 4 | Earth, Planets and Space

Fig. 4

From: On the detectability of the magnetic fields induced by ocean circulation in geomagnetic satellite observations

Fig. 4

The assimilation results for the ideal test case scenario with identical true and imposed magnetic fields. The upper plots show both the absolute deviation of the final scale factor \({\mathbf{k}}_{f}\) from the true value of 1 (left) and the associated uncertainty (posterior standard deviation) of the final scale factor \(\sigma _{{\mathbf{k}}_{f}}\) (right). Dark red (respectively, blue) indicates unchanged major deviations (respectively, posterior standard deviation) after the assimilation, whereas lighter colors point out areas with lower deviations and reduced uncertainty. The bottom plots present the results for the rescaled imposed field using the final scale factor. The radial component of the temporal averaged rescaled OIMF \(\overline{{\mathbf{B}}}_{r}^{\text{rescaled}}\) is shown on the left. Its deviations from the temporal averaged true oceanic contribution \(\overline{{\mathbf{B}}}_{r}^{\text{true}}\) included in the observations, are shown on the right. Here, red colors indicate higher and blue lower values in the radial component of rescaled OIMF than the true OIMF. Note the different color range to show the deviations

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