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Improved general circulation models of the Martian atmosphere from the surface to above 80 km
We describe a set of two “new generation” general circulation models of the Martian atmosphere derived from the models we originally developed in the early 1990s. The two new models share the same…
Global Mineralogical and Aqueous Mars History Derived from OMEGA/Mars Express Data
Global mineralogical mapping of Mars by the Observatoire pour la Mineralogie, l'Eau, les Glaces et l'Activité (OMEGA) instrument on the European Space Agency's Mars Express spacecraft provides new…
Warming early Mars with carbon dioxide clouds that scatter infrared radiation.
Model calculations show that the surface of early Mars could have been warmed through a scattering variant of the greenhouse effect, resulting from the ability of the carbon dioxide ice clouds to reflect the outgoing thermal radiation back to the surface.
Increased insolation threshold for runaway greenhouse processes on Earth-like planets
- J. Leconte, F. Forget, B. Charnay, R. Wordsworth, A. Pottier
- Environmental Science, GeologyNature
- 11 December 2013
A three-dimensional global climate model is used to show that the insolation threshold for the runaway greenhouse state to occur is about 375 W m−2, which is significantly higher than previously thought and has strong implications for the possibility of liquid water existing on Venus early in its history, and extends the size of the habitable zone around other stars.
A climate database for Mars
A database of statistics which describe the climate and surface environment of Mars has been constructed directly on the basis of output from multiannual integrations of two general circulation…
Formation of Recent Martian Debris Flows by Melting of Near-Surface Ground Ice at High Obliquity
It is shown that these gullies on Mars may result from the melting of water ice in the top few meters of the martian subsurface at high obliquity, and that above-freezing temperatures can occur in the near surface of Mars, but are only predicted at latitudes and for slope orientations corresponding to where the gullies have been observed on Mars.
Origin and role of water ice clouds in the Martian water cycle as inferred from a general circulation model
In this paper, we present the results obtained by the general circulation model developed at the Laboratoire de Meteorologie Dynamique which has been used to simulate the Martian hydrological cycle.…
3D climate modeling of close-in land planets: Circulation patterns, climate moist bistability and habitability
- J. Leconte, F. Forget, B. Charnay, R. Wordsworth, F. Selsis, E. Millour
- Physics, Geology
- 28 March 2013
The inner edge of the classical habitable zone is often defined by the critical flux needed to trigger the runaway greenhouse instability. This 1D notion of a critical flux, however, may not be so…
3D modelling of the early Martian Climate under a denser CO2 atmosphere: Temperatures and CO2 ice clouds.
Recent formation and evolution of northern Martian polar layered deposits as inferred from a Global Climate Model
 We present a time-marching model which simulates the exchange of water ice between the Martian northern cap, the tropics, and a high-latitude surface reservoir. Net annual exchange rates of water…