Sources of hydrogen in the primordial atmosphere of Venus

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Table 2

Results of matched cases of initial atmosphere with H₂ less than 210 moles cm⁻².

Rotator	Initial H₂O	Initial H₂	Accumulated O	Accumulated CO₂	t_H.
Slow	6820	105–210	210–261	315–735	13–18
Slow	6820	16–53	379–382	1495	13
Slow	6820	≤11	356	1504	13
Slow	4547	105–210	304–434	942–984	8
Slow	4547	21–53	435–438	993	7
Slow	4547	≤16	413	1003	7
Slow	2273	21–53	787–789	492	3
Slow	2273	11–16	765	501	3
Slow	2273	≤5	835	501	3
Moderate	–	–	–	–	–
Fast	–	–	–	–	–

Notes. Initial and accumulated values are expressed in units of moles cm⁻². The t_H (in Myr) represents the timescale during which all of the hydrogen has been lost.

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