Fig. 2: Normalized AR-z spectra of the used polar motion (PM) and length-of-day variations (ΔLOD) records (1949–2020). | Nature Communications

Fig. 2: Normalized AR-z spectra of the used polar motion (PM) and length-of-day variations (ΔLOD) records (1949–2020).

From: Inner core static tilt inferred from intradecadal oscillation in the Earth’s rotation

Fig. 2: Normalized AR-z spectra of the used polar motion (PM) and length-of-day variations (ΔLOD) records (1949–2020).The alternative text for this image may have been generated using AI.

The AR-z spectra of the PM (a) and ΔLOD (b) records in which the atmospheric and oceanic angular momentum effects were removed. Different colored rectangles indicate different periodic signals; the gray area represents 95% confidence intervals (C.I.).

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