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Increased insolation threshold for runaway greenhouse processes on Earth-like planets
The increase in solar luminosity over geological timescales should warm the Earth’s climate, increasing water evaporation, which will in turn enhance the atmospheric greenhouse effect. Above aExpand
3D climate modeling of close-in land planets: Circulation patterns, climate moist bistability and habitability
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 soExpand
3D modelling of the early Martian Climate under a denser CO2 atmosphere: Temperatures and CO2 ice clouds.
On the basis of geological evidence, it is often stated that the early martian climate was warm enough for liquid water to flow on the surface thanks to the greenhouse effect of a thick atmosphere.Expand
Global modelling of the early Martian climate under a denser CO2 atmosphere: Water cycle and ice evolution
Abstract We discuss 3D global simulations of the early martian climate that we have performed assuming a faint young Sun and denser CO 2 atmosphere. We include a self-consistent representation of theExpand
The Climate of Early Mars
The nature of the early martian climate is one of the major unanswered questions of planetary science. Key challenges remain, but a new wave of orbital and in situ observations and improvements inExpand
Exploring the faint young Sun problem and the possible climates of the Archean Earth with a 3-D GCM
[1] 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 previousExpand
Hydrogen-Nitrogen Greenhouse Warming in Earth's Early Atmosphere
Faint Young Sun During the first ∼billion years after the formation of Earth, the Sun was significantly less luminous than today, delivering considerably less solar energy to our planet.Expand
Gliese 581d is the First Discovered Terrestrial-mass Exoplanet in the Habitable Zone
It has been suggested that the recently discovered exoplanet GJ581d might be able to support liquid water due to its relatively low mass and orbital distance. However, GJ581d receives 35% lessExpand
ABIOTIC OXYGEN-DOMINATED ATMOSPHERES ON TERRESTRIAL HABITABLE ZONE PLANETS
Detection of life on other planets requires identification of biosignatures, i.e., observable planetary properties that robustly indicate the presence of a biosphere. One of the most widely acceptedExpand
Transient reducing greenhouse warming on early Mars
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 climateExpand
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