Table 1 Long-term trends of polar motion
From: Analysis and prediction of polar motion using MSSA method
Literature | PMX (mas/year) | PMY (mas/year) | PM (mas/year) | Direction (°W) | Data/time span | Trend |
|---|---|---|---|---|---|---|
This paper | 2.02 ± 0.2 | 3.07 ± 0.2 | 3.67 | 56.70 | 14 C04/1962–2020.5 | Linear trend |
This paper | 2.04 ± 0.02 | 3.11 ± 0.02 | 3.72 | 56.79 | 14 C04/1962–2020.5 | Non-linear trend |
Schuh et al. (2001) | – | – | 4.00 | 77.36 | 93 C01/1861–1997 | Linear trend |
Schuh et al. (2001) | – | – | 3.31 | 76.10 | OA97/1899.7–1992.0 | Linear trend |
Chen et al. (2013) | 7.26 ± 0.17 (\(\chi_{1}\)) | 5.45 ± 0.25 (\(\chi_{2}\)) | – | 36.90 | 08 C04/2005–2011 | Linear trend/mass excitations |