CMB Viscous + Electromagnetic Coupling Torque
mechanism
The idea that Earth's core could 'decouple' and spin freely is physically impossible — several forces glue it to the mantle.
Who they are
The mix of forces that grip the boundary between Earth's molten core and solid mantle.
What they do
The engine uses this as hard evidence against a 'frictionless' core-slip catastrophe.
How it works
The coupling comes from the liquid iron's stickiness (viscosity ~1e-4 m2/s), electromagnetic drag (mantle conductance ~1e8 S), plus the shape of the boundary and gravity — together they clamp down on any difference in spin.
Why it matters
These forces make the 'frictionless decoupling' that doomsday ECDO scenarios require simply impossible, per peer-reviewed physics.
The engine's record — word for word
Coupling at the core-mantle boundary is mediated by viscous (liquid-iron viscosity ~1e-4 m2/s), electromagnetic (~1e8 S mantle conductance), topographic and gravitational torques. These constrain differential rotation and preclude the 'frictionless decoupling' ECDO requires. [TIER GEOPHYSICS-PEER-REVIEW; Apex (a)] [Report #103 (ECDO)]
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