Warming early Mars with CO 2 and H 2
By R. Ramirez, R. Kopparapu, M. Zugger, T. Robinson, R. Freedman, J. Kasting. 2014
284 citations recorded by the source corpus.
Ancient valleys suggest a warm early Mars where liquid water flowed, but a greenhouse effect strong enough to offset a dim early Sun has been difficult to explain. Climate simulations suggest that sufficient concentrations of the greenhouse gases CO2 and H2 — outgassed during volcanic eruptions — could have warmed Mars above water’s freezing point.
Subfields: Aerospace Engineering, Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/bd82f7d4656f5ac8b0cf16edefcc5a658445dddb
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In Aerospace Engineering
In Astronomy and Astrophysics
- R. Wordsworth
- L. Kaltenegger
- E. Kite
- Francois Forget
- James W. Head III
- R. Pierrehumbert
- L. Kerber
- Giada N. Arney
Citations in the corpus
- Geologic Constraints on Early Mars Climate (2018, background): “…on Early Mars span a wide range of trigger mechanisms, timescales, and temperatures (e.g. Wordsworth 2016, Kite et al. 2013a, Urata & Toon 2013, Ramirez et al. 2014, Halevy & Head 2014, Kerber et al. 2015, Batalha et al. 2016, Wordsworth et al. 2017, Kite et al. 2017a, Haberle et al. 2017,…”
- Exoplanet Biosignatures: A Review of Remotely Detectable Signs of Life (2017, background): “…or biological scenarios for rocky planets with significant H2 fractions in our Solar System, although both early Mars and early Earth may have had a climatically significant H2 component that requires further study (e.g., Tian et al., 2005; Ramirez et al., 2013; Wordsworth and Pierrehumbert, 2013).”
- The Climate of Early Mars (2016, methodology): “In a thought-provoking paper, Ramirez et al. (2014) proposed www.annualreviews.org • The Climate of Early Mars 9 that CO2-H2 absorption could have caused warming on early Mars in a similar fashion, perhaps sufficiently to put the climate into a warm and wet state.”
- How to Characterize Habitable Worlds and Signs of Life (2017, background): “…plane-parallel approach that divides the atmosphere in layers (see, e.g., Kasting et al. 1993; Segura et al. 2005; Tinetti et al. 2006; Selsis et al. 2007; Kaltenegger et al. 2009; Rauer et al. 2011; Kopparapu et al. 2013; Rugheimer et al. 2013; Domagal-Goldman et al. 2014; Ramirez et al. 2014a,b).”
- Comparison of “warm and wet” and “cold and icy” scenarios for early Mars in a 3‐D climate model (2015, background): “rently appears physically viable [Kasting, 1991; Wordsworth et al., 2013; Forget et al., 2013]. Most recently, a H 2 -CO 2 atmosphere to create a long-term warm and wet early Mars has been suggested [Ramirez et al., 2014], following a similar proposal for H 2 -N 2 warming on the early Earth [Wordswo”