Water on Mars: Do submarine cyclic steps exist on the red planet?

Progress in Earth and Planetary Science

Table 1 Calculated formative conditions for submarine cyclic steps on Earth and Mars

	Ds (μm)	20	50	80	100	150	200
On Earth
	v_s (cm/s)	0.04	0.22	0.51	0.74	1.43	2.20
Always steps	U_o (cm/s) ^a >	11.8	72.6	169.5	247.9	476.5	734.6
No steps	U_o (cm/s) ^b <	7.1	43.5	101. 7	148.7	285.9	440.8
	R _f	0.020	0.077	0.141	0.185	0.290	0.388
	Δu*(cm/s)^c >	3.1	4.9	6.2	7.0	8.5	9.8
On Mars
	v_s (cm/s)	0.01	0.08	0.21	0.31	0.62	0.98
Always steps	U_o (cm/s) ^a >	4.3	28.2	68.6	102.5	204.9	325.1
No steps	U_o (cm/s) ^b <	2.6	16.9	41.2	61.5	122.9	195.1
	R _f	0.012	0.048	0.093	0.124	0.203	0.279
	Δu*(cm/s) ^c >	1.9	3.0	3.8	4.3	5.2	6.1
Comparison
Always steps	k ^d	0.64	0.61	0.60	0.59	0.57	0.56
Always steps	m ^e	0.39	0.39	0.39	0.39	0.39	0.39

Note: ^aEq. (2), ^bEq. (3), ^cEq. (6), ^d(U_o^Earth - U_o^Mars)/U_o^Earth, ^e(Δu*^Earth - Δu*^Mars)/Δu*^Earth