A long-term numerical solution for the insolation quantities of the Earth
- J. Laskar, P. Robutel, B. Levrard
- Physics, Environmental Science
- 1 December 2004
We present here a new solution for the astronomical computation of the insolation quantities on Earth spanning from -250 Myr to 250 Myr. This solution has been improved with respect to La93 (Laskar…
Long term evolution and chaotic diffusion of the insolation quantities of Mars
- J. Laskar, A. Correia, M. Gastineau, F. Joutel, B. Levrard, P. Robutel
- Physics, Geology
- 1 August 2004
Habitable planets around the star Gliese 581
- F. Selsis, J. Kasting, B. Levrard, J. Paillet, I. Ribas, X. Delfosse
- Geology, Physics
- 28 October 2007
Radial velocity surveys are now able to detect terrestrial planets at habitable distance from M-type stars. Recently, two planets with minimum masses below 10 Earth masses were reported in a triple…
Orbital forcing of the martian polar layered deposits
- J. Laskar, B. Levrard, J. Mustard
- Environmental Science, GeologyNature
- 26 September 2002
A correlation exists between ice-layer radiance as a function of depth and the insolation variations in summer at the martian north pole, similar to what has been shown for palaeoclimate studies of the Earth.
Is tidal heating sufficient to explain bloated exoplanets? Consistent calculations accounting for finite initial eccentricity
- J. Leconte, G. Chabrier, I. Baraffe, B. Levrard
- Physics, Geology
- 3 April 2010
We present the consistent evolution of short-period exoplanets coupling the tidal and gravothermal evolution of the planet. Contrarily to previous similar studies, our calculations are based on the…
Recent formation and evolution of northern Martian polar layered deposits as inferred from a Global Climate Model
- B. Levrard, F. Forget, F. Montmessin, J. Laskar
- Environmental Science, Geography
- 1 June 2007
[1] 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…
Recent ice-rich deposits formed at high latitudes on Mars by sublimation of unstable equatorial ice during low obliquity
- B. Levrard, F. Forget, F. Montmessin, J. Laskar
- Environmental Science, GeologyNature
- 28 October 2004
Using the ice accumulation rates estimated from global climate model simulations, it is shown that, over the past ten million years, large variations of Mars' obliquity have allowed the formation of such metres-thick, sedimentary layered deposits in high latitude and polar regions.
Formation of Glaciers on Mars by Atmospheric Precipitation at High Obliquity
- F. Forget, R. Haberle, F. Montmessin, B. Levrard, J. Head
- Geology, Environmental ScienceScience
- 20 January 2006
High-resolution climate simulations performed with a model designed to simulate the present-day Mars water cycle but assuming a 45° obliquity points to an atmospheric origin for the ice and reveals how precipitation could have formed glaciers on Mars.
FALLING TRANSITING EXTRASOLAR GIANT PLANETS
- B. Levrard, C. Winisdoerffer, G. Chabrier
- Physics, Geology
- 14 January 2009
We revisit the tidal stability of extrasolar systems harboring a transiting planet and demonstrate that, independently of any tidal model, none, but one (HAT-P-2b) of these planets has a tidal…
Amazonian northern mid-latitude glaciation on Mars: A proposed climate scenario
- J. Madeleine, F. Forget, J. Head, B. Levrard, F. Montmessin, E. Millour
- Environmental Science, Geology
- 1 October 2009
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