Skip to main content

Table 4 CIY4 damping parameter values

From: A comprehensive model of Earth’s magnetic field determined from 4 years of Swarm satellite observations

Norm Damping parameter (\(\lambda\))
Core
\(\mathcal{P}\langle {\dddot{B}_r^2}\rangle\) \(1.0\times 10^1\,({\mathrm{nT}}\cdot {\mathrm{year}}^{-3})^{-2}\)
\(\mathcal{P}\langle {\dddot{B}_{r,n=1,m=0}^2}\rangle\) \(3.0\times 10^2\,(\mathrm{nT}\cdot \mathrm{year}^{-3})^{-2}\)
\(\mathcal{P}\langle {\dddot{B}_{r,n=2,m=0}^2}\rangle\) \(1.0\times 10^1\,(\mathrm{nT}\cdot \mathrm{year}^{-3})^{-2}\)
\(\mathcal{P}\langle {\ddot{B}_r^2}\rangle\) \(4.0\times 10^{-2}\,(\mathrm{nT}\cdot \mathrm{year}^{-2})^{-2}\)
Lithosphere
\(\mathcal{P}\langle \left| {\mathbf {B}_{n\ge 85}}\right| ^2\rangle\) \(2.0\times 10^1\,(\mathrm{nT})^{-2}\)
Ionosphere
\(\mathcal{P}\langle \left| {\mathbf {J}_{\mathrm{eq},\mathrm{MLT}:21{-}05}}\right| _2^2\rangle\) \(4.0\times 10^7\,(\mathrm{A}\cdot \mathrm{km}^{-1})^{-2}\)
\(\mathcal{P}\langle \left| {\nabla _s^2\mathbf {J}_{\mathrm{eq},p>0,\mathrm{mid{-}lat}}}\right| _2^2\rangle\) \(1.0\times 10^0\,(\mathrm{A}\cdot \mathrm{km}^{-3})^{-2}\)
Magnetosphere/induced
\({\mathcal{P}}\langle \left| {\mathbf{p}}_{\mathrm{mag/ind}} \right|_{2}^{2}\rangle\) Variable \((\mathrm{nT})^{-2}\)
\(\mathcal{P}\langle \left| {\mathbf {p}_{\mathrm{ind}\perp \mathrm{core}}}\right| _2^2\rangle\) \(\infty \,(\mathrm{nT})^{-2}\)