Impact Induced Oxidation and Its Implications for Early Mars Climate
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Impact Induced Oxidation and Its Implications for Early Mars Climate. / Pan, Lu; Deng, Zhengbin; Bizzarro, Martin.
In: Geophysical Research Letters, Vol. 50, No. 6, e2023GL102724, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Impact Induced Oxidation and Its Implications for Early Mars Climate
AU - Pan, Lu
AU - Deng, Zhengbin
AU - Bizzarro, Martin
N1 - Publisher Copyright: © 2023. The Authors.
PY - 2023
Y1 - 2023
N2 - H2 in a CO2 atmosphere may serve as a potential solution to the early Mars climate paradox, but its unknown sources cast doubts on the proposed mechanism. Impact cratering is an energetic process that may modify the surface redox budget. Here, we investigate the potential influence of impact-related melt oxidation and serpentinization on global climate conditions. We show that impact melt and the projectile's significant oxidizing potential during basin-forming impacts (Basin size ≥1,250 km) result in sufficient H2 to raise the global mean temperature to above 273K, which lasts for up to 105 − 106 yr considering rate-limited regime. Impact-induced serpentinization has limited consequences on the global climate in comparison. Episodic warming after large impacts may have enabled the presence of liquid water for up to several million years in the Noachian, resulting in the chemical evolution of the planet's surface co-evolving with the planetary atmosphere in an episodic manner.
AB - H2 in a CO2 atmosphere may serve as a potential solution to the early Mars climate paradox, but its unknown sources cast doubts on the proposed mechanism. Impact cratering is an energetic process that may modify the surface redox budget. Here, we investigate the potential influence of impact-related melt oxidation and serpentinization on global climate conditions. We show that impact melt and the projectile's significant oxidizing potential during basin-forming impacts (Basin size ≥1,250 km) result in sufficient H2 to raise the global mean temperature to above 273K, which lasts for up to 105 − 106 yr considering rate-limited regime. Impact-induced serpentinization has limited consequences on the global climate in comparison. Episodic warming after large impacts may have enabled the presence of liquid water for up to several million years in the Noachian, resulting in the chemical evolution of the planet's surface co-evolving with the planetary atmosphere in an episodic manner.
KW - impact melt
KW - Mars climate
KW - serpentinization
U2 - 10.1029/2023GL102724
DO - 10.1029/2023GL102724
M3 - Journal article
AN - SCOPUS:85152525998
VL - 50
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 6
M1 - e2023GL102724
ER -
ID: 344797695