Table 2 Secondary (symmetric) (\({a}_{l}^{u}\)) and primary (antisymmetric) (\({b}_{l}^{u}\)) harmonic terms, and estimates for its relative contribution (b/a ratio), carried out from Model G fitting curves from this work and other studies based on VGP dispersion analyses for most of the Phanerozoic.
# | Work | Interval (Myr) | \(\,{a}_{l}^{u}\) | \(\,{b}_{l}^{u}\) | b/a |
|---|---|---|---|---|---|
1 | De Oliveira et al.26(a) | 262.0–318.0 | \({9.4}_{7.5}^{10.9}\) | \({0.27}_{0.22}^{0.29}\) | \({0.029}_{0.021}^{0.037}\) |
2 | This work(b) | 228.7–266.7 | \({\bf{13}}{\boldsymbol{.}}{{\bf{2}}}_{{\bf{6.8}}}^{{\bf{16.3}}}\) | \({\bf{0.1}}{{\bf{2}}}_{{\bf{0.11}}}^{{\bf{0.13}}}\) | \({\bf{0.00}}{{\bf{9}}}_{{\bf{0.004}}}^{{\bf{0.014}}}\) |
3 | Biggin et al.25(c) | 145.0–200.0 | \({16.4}_{10.3}^{19.0}\) | \({0.19}_{0.00}^{0.46}\) | \({0.012}_{0.000}^{0.028}\) |
4 | Biggin et al.25(d) | 84.0–125.0 | \({8.7}_{6.3}^{10.7}\) | \({0.27}_{0.22}^{0.31}\) | \({0.031}_{0.021}^{0.041}\) |
5 | McFadden et al.27 | 45.0–80.0 | \({9.7}_{8.2}^{11.2}\) | \({0.34}_{0.31}^{0.37}\) | \(\,{0.035}_{0.029}^{0.041}\) |
6 | McFadden et al.27 | 22.5–45.0 | \({15.4}_{12.7}^{20.3}\) | \({0.29}_{0.21}^{0.35}\) | \(\,{0.019}_{0.012}^{0.026}\) |
7 | McFadden et al.27 | 5.0–22.5 | \({17.8}_{16.9}^{18.7}\) | \({0.19}_{0.16}^{0.22}\) | \(\,{0.011}_{0.009}^{0.012}\) |
8 | Johnson et al.28 | 0–5.0 | \({14.6}_{13.4}^{15.6}\) | \({0.20}_{0.13}^{0.24}\) | \(\,{0.014}_{0.009}^{0.019}\) |
