Table 1 Contributions to the secular trend in mas per year and R2 score, together with the uncertainty

From: Contributions of core, mantle and climatological processes to Earth’s polar motion

 

Barystatic

GIA and MC

Core dynamics

Seismic

Linear sum

PINNs

Observed

Secular trend xp

0.05 ± 0.01

0.40 ± 0.003

0.45 ± 0.02

0.03 ± 0.007

0.92 ± 0.03

0.79 ± 0.02

0.81 ± 0.02

Secular trend yp

−0.35 ± 0.04

2.66 ± 0.004

0.29 ± 0.03

0.05 ± 0.008

2.67 ± 0.06

2.39 ± 0.05

2.52 ± 0.05

R2 score xp

87.55 ± 1.27

0

6.51 ± 0.65

−9.62 ± 0.96

95.88 ± 1.76

98.24 ± 1.66

100

R2 score yp

89.08 ± 1.91

0

−16.44 ± 0.93

−1.79 ± 0.38

89.48 ± 1.12

96.39 ± 1.87

100

  1. Values from individual geophysical processes and their linear sum are computed from the predictions presented in Fig. 4. The direct reconstruction of polar motion by PINNs corresponds to the black curves in Fig. 3.
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