Can the Earth's dynamo run on heat alone?

By David Gubbins, Dario Alfè, G. Masters, G. D. Price, Michael J. Gillan. 2003

140 citations recorded by the source corpus.

Subfields: Astronomy and Astrophysics, Molecular Biology, Physiology

View Paper: https://www.semanticscholar.org/paper/91b22f37f07c14ead508b6b04222abde6c66cae5

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Citations in the corpus

Dynamo Scaling Laws and Applications to the Planets (2010, background): “The amount of ohmic dissipation in the Earth’s core has been a contentious issue, with estimates ranging between 0.1 and 3.5 TW (Buffett 2002; Roberts et al. 2003; Labrosse 2003; Gubbins et al. 2003; Christensen and Tilgner 2004).”
Gross thermodynamics of two-component core convection (2004, background): “In Gubbins et al. (2003), hereafter referred to as Paper I, we explored purely thermal convection.”
Thermal and electrical conductivity of solid iron and iron-silicon mixtures at Earth's core conditions (2013, methodology): “To get qs = qa requires that dTo/dt ≈ 540 K Gyr−1, equivalent to a CMB heat-flux Q = 66 TW using the core energetics model in Pozzo et al. (2012) (see Gubbins et al., 2003, 2004 for a complete description).”
The properties of iron under core conditions from first principles calculations (2003, background): “However, the highP behaviour of dvP /dT is important, as pointed out by Gubbins et al. (2003) , as it has a direct relationship”
The intensity of the geomagnetic field in the late-Archaean: new measurements and an analysis of the updated IAGA palaeointensity database (2009, background): “…Glatzmaier, 2006; Biggin et al., 2008) may well be associated with the growth of the inner core which affects the geodynamo both by changing the geometry of the spherical shell it operates in and by providing a highly efficient power source (Gubbins et al., 2003; Labrosse, 2003) for its operation.”
Thermal and magnetic evolution of the Earth’s core (2003, background): “The poorly constrained heat of reaction has not been included here and it can be argued to play a rather minor role(Gubbins et al., 2003b; Lister, 2003).”
Thermal versus elastic heterogeneity in high‐resolution mantle circulation models with pyrolite composition: High plume excess temperatures in the lowermost mantle (2009, background): “…understanding provides estimates ranging from 0.1 to 3.5 TW [Roberts and Glatzmaier, 2000; Buffett, 2002; Roberts et al., 2003; Labrosse, 2003; Gubbins et al., 2003; Christensen and Tilgner, 2004], The total core heat loss may thus approach 9–12 TW. Specifically, this implies a core…”
Energetics of the Core (2015, methodology): “3.2.1 General Expression A very general expression for energy conservation within the core may be written as follows (Gubbins et al. 2003; see also Buffett et al. 1996): d dt ∫ ρe dV + d dt ∫ 1 2 ρv2 dV + ∫ ∂ ∂t B2 2µ0 dV = − ∮ Pv · dS− ∮ E×B µ0 · dS + ∮ v · τ ′ · dS (12) − ∮ q · dS + ∫ ρh dV + ∫…”