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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: Towards probing Earth’s upper mantle with daily magnetic field variations: exploring a physics-based parametrization of the source

Fig. 5

Number of modes needed to explain 99% variance for each period, P = 24, 12, 8, 6, 4.8, and 4 h. The time series length is 16 days, 1 month, and 2 months (adjacent months, thus January–February, March–April, May–June, etc.). The FT segment length for all PCA runs is 24 h. Note that January and December do not have the full months of data available, as the TIE-GCM stream function spans 13.01.2009-16.12.2009

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