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Box Model: Core Evolution ~ 700 Myr

Geodynamo Evolution Flow Chart. Box Model: Core Evolution ~ 700 Myr. Thermodynamic Parameters. CMB Heat Flow Q(t) T(r,0), C(r,0), r ICB (0). T(r, t ) C( r,t ) r ICB (t). 3D Model: Numerical Dynamo ~ 5 Myr intervals. CMB Heat Flux Heterogeneity q( x ) W (t).

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Box Model: Core Evolution ~ 700 Myr

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  1. Geodynamo Evolution Flow Chart Box Model: Core Evolution ~ 700 Myr Thermodynamic Parameters CMB Heat Flow Q(t) T(r,0), C(r,0), rICB(0) T(r,t) C(r,t) rICB(t) 3D Model: Numerical Dynamo ~ 5 Myr intervals CMB Heat Flux Heterogeneity q(x) W(t) Transport Parameters T(x,t) C(x,t) B(x,t) GPTS Reversals

  2. Navier-Stokes: Dynamo Equations(Boussinesqapproximation w/ thermo-chemical convection) Co-density (temperature + light elements): Induction: Transport: Continuity: Self-sustaining dynamo: finite magnetic energy w/o external sources

  3. Numerical Dynamo Resolution vs. Simulation Time Realism * Efficiency * Magnetic free decay time, NOT astronomical time!

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