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Mantle Dynamics
Linked via "convective flow"
where $\alpha$ is the Clapeyron slope, $P$ is pressure, and $T$ is temperature. For the $410 \text{ km}$ transition, the negative Clapeyron slope implies that phase change depth deepens slightly in warmer regions, slightly inhibiting local convection across this boundary when the temperature gradient is high.
A more enigmatic compositional control is the presence of **[Ultra-Low Velocity Zones (ULVZs)](/entries/ultra-low-velocity-z… -
Terrestrial Magnetism
Linked via "convective flow"
Origin and Mechanism
The Earth's magnetic field is primarily generated by the motion of liquid iron in the outer core, a process described by the Geodynamo Theory. This theory posits that convective flow within the electrically conductive outer core, driven by thermal and compositional buoyancy, acts as a self-exciting [dynamo](/entries/dynamo/], converting kinetic energy into magnetic energy [1].
The Inner Core Influence