Table 3.
Observed Stokes coefficients (no units) of gravity variations of degree 2 and contribution from core processes
| , | , | |||||
|---|---|---|---|---|---|---|
| Decadal | 6 year | Decadal | 6 year | Decadal | 6 year | |
| Observed | 1 | 0.5 | 0.5 | 0.2 | 0.5 | 0.2 |
| CMB pressure | 0.1 | 0.01 | 0.05 | 0.005 | 0.05 | 0.005 |
| Density | 0.05 | 0.005 | 0.025 | 0.0025 | 0.025 | 0.0025 |
| Inner core rotation | 0.2 | 0.006 | ||||
| Inner core | 0.025 | 0.0025 | ||||
All numerical values are multiplied by a factor . To retrieve amplitudes in units of nGal, numerical values for , 1 and 2 should be multiplied by (for the amplitude at the poles), and , respectively
†Set to half of the contribution from CMB pressure based on the results in Dumberry (2010)
‡Not a prediction, but assuming an inner core tilt generating a decadal (6 year) polar motion of 1 (0.1) mas