According to David Stevenson of Cal Tech, there are no geodynamos in 2D. The third dimension is necessary to break symmetry. No magnetic fields for 2D planets.
https://www.youtube.com/watch?v=F488kOmhu9Q
mr_e_man wrote:There is Coriolis in 2D! It's always perpendicular to the direction of motion; so if something were moving along the rotating planet's surface, it would feel like more or less gravity. If something were rising or falling, it would be deflected sideways.
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