Benjamin Charnay

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0019-1035/$ see front matter 2012 Elsevier Inc. A ⇑ Corresponding author. Present address: Departm University of Chicago, IL 60637, USA. E-mail address: (R. W We discuss 3D global simulations of the early martian climate that we have performed assuming a faint young Sun and denser CO2(More)
Different solutions have been proposed to solve the ’faint young Sun problem’, defined by the fact that the Earth was not fully frozen during the Archean despite the fainter Sun. Most previous studies were performed with simple 1D radiative convective models and did not account well for the clouds and ice-albedo feedback or the atmospheric and oceanic(More)
UNLABELLED As lower-mass stars often host multiple rocky planets, gravitational interactions among planets can have significant effects on climate and habitability over long timescales. Here we explore a specific case, Kepler-62f (Borucki et al., 2013 ), a potentially habitable planet in a five-planet system with a K2V host star. N-body integrations reveal(More)
Recognizing whether a planet can support life is a primary goal of future exoplanet spectral characterization missions, but past research on habitability assessment has largely ignored the vastly different conditions that have existed in our planet's long habitable history. This study presents simulations of a habitable yet dramatically different phase of(More)
Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online's data policy on reuse of materials please consult the policies page. The climate on Earth is generally determined by the amount and distribution of incoming solar radiation, which must(More)
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