Theory 05/Dust storms/Threshold lens
Storms Ignite on a Shear Threshold
The claim
Dust storms ignite above a threshold in the ratio of wind shear to crust strength, so the same wind produces a storm on one surface and nothing on another.
01Mechanism
Emission begins when the aerodynamic force on particles exceeds the bonds holding them; the ratio determines when that happens.
02Prediction
Storm ignition should track the ratio across surfaces.
03Refutation
Ignition tracking wind alone would remove crust strength.