The DOI matches its Crossref record; 59 of the 59 references it cites were found in a registry or an index.
Transient reducing greenhouse warming on early Mars
Open accessAbstract
The evidence for abundant liquid water on early Mars despite the faint young Sun is a long‐standing problem in planetary research. Here we present new ab initio spectroscopic and line‐by‐line climate calculations of the warming potential of reduced atmospheres on early Mars. We show that the strength of both CO 2–H 2 and CO 2–CH 4 collision‐induced absorption (CIA) has previously been significantly underestimated. Contrary to previous expectations, methane could have acted as a powerful greenhouse gas on early Mars due to CO 2–CH 4 CIA in the critical 250–500 cm−1 spectral window region. In atmospheres of 0.5 bar CO 2 or more, percent levels of H 2 or CH 4 raise annual mean surface temperatures by tens of degrees, with temperatures reaching 273 K for pressures of 1.25–2 bars and 2–10% of H 2 and CH 4. Methane and hydrogen produced following aqueous alteration of Mars' crust could have combined with volcanically outgassed CO 2 to form transient atmospheres of this composition 4.5–3.5 Ga. Our results also suggest that inhabited exoplanets could retain surface liquid water at significant distances from their host stars.
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Metadata
- Authors
- Wordsworth, R., Kalugina, Y., Lokshtanov, S., Vigasin, A., Ehlmann, B., Head, J., Sanders, C., & Wang, H.
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2017-01-21
- Volume
- 44
- Issue
- 2
- Pages
- 665-671
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2545903499
- Cited by
- 264
- References
- 59
- FWCI
- 16.94
- Type
- journal article
- Language
- en
- Open access
- bronze
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