From: Physics-based secular variation candidate models for the IGRF
Period | 2005.0-2010.0 | 2009.0-2014.0 | 2015.0-2019.3 | |||
---|---|---|---|---|---|---|
Spherical harmonic truncation used to compute error | 8 | 13 | 8 | 13 | 8 | 13 |
Nocast | 399.8 | 400.2 | 438.9 | 439.4 | 382.6 | 383.0 |
Linear extrapolation, 1-year SV | 70.7 | 72.2 | 57.2 | 58.2 | 63.8 | 64.6 |
Linear extrapolation, Seq. SV | 71.6 | 71.9 | 57.6 | 58.1 | 64.5 | 65.1 |
Coupled Earth, ensemble, QG-MAC, 1-year SV | 74.5 | 75.4 | 77.3 | 77.8 | 62.2 | 62.9 |
Steady flow, ensemble, QG-MAC, 1-year SV | 67.9 | 68.8 | 60.1 | 60.7 | 60.0 | 60.7 |
Steady flow, ensemble, QG-MAC, Seq. SV | 64.5 | 64.8 | 59.8 | 60.2 | 62.7 | 63.2 |
Steady flow, no ensemble, QG-MAC, 1-year SV | 70.8 | 71.7 | 62.7 | 63.3 | 60.5 | 61.4 |
Steady flow, ensemble, no QG-MAC, 1-year SV | 66.2 | 67.3 | 60.8 | 61.5 | 64.5 | 65.1 |
Steady flow, no ensemble, no QG-MAC, 1-year SV | 71.7 | 72.7 | 65.9 | 66.5 | 65.6 | 66.2 |