The faint young Sun problem

@article{Feulner2012TheFY,
  title={The faint young Sun problem},
  author={Georg Feulner},
  journal={Reviews of Geophysics},
  year={2012},
  volume={50}
}
  • G. Feulner
  • Published 19 April 2012
  • Geology
  • Reviews of Geophysics
For more than four decades, scientists have been trying to find an answer to one of the most fundamental questions in paleoclimatology, the “faint young Sun problem.” For the early Earth, models of stellar evolution predict a solar energy input to the climate system that is about 25% lower than today. This would result in a completely frozen world over the first 2 billion years in the history of our planet if all other parameters controlling Earth's climate had been the same. Yet there is ample… 
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References

SHOWING 1-10 OF 383 REFERENCES
Toward a solution to the early faint Sun paradox: A lower cosmic ray flux from a stronger solar wind
[1] Standard solar models predict a solar luminosity that gradually increased by about 30% over the past 4.5 billion years. Under the faint Sun, Earth should have been frozen solid for most of its
Countering the Early Faint Sun
A haze of fractal particles may account for the warm temperatures that led to the wet conditions of the early Earth. In 1972, Carl Sagan and George Mullen noted the earlier discovery that our Sun
Warming the early earth—CO2 reconsidered
Faint Young Sun, Planetary Paleoclimates and Varying Fundamental Constants
The effect of a cosmic time variation of the gravitational constant on the solar luminosity evolution is studied. It is demonstrated that a varying gravitational constant can substantially affect the
The “faint young Sun paradox”: further exploration of the role of dynamical heat-flux feed backs in maintaining global climate stability
Abstract The climate-modeling problems associated with global change underline the importance of understanding paleoclimates. The available evidence, which suggests that the Earth has never been
The faint young sun-climate paradox: Continental influences
We examine the various mechanisms which have been proposed to compensate for the climatic effects of a 30% increase in the solar luminosity over the past 4½ billion years. Although atmospheric
Carbon dioxide, ammonia and the origin of life
Stellar evolution theory predicts that the luminosity of the Sun has increased by ∼30% over the past 4,000 Myr. Yet geological and biological evidence indicates that the climate of the Earth between
Evolution of a habitable planet
Our Sun. V. A Bright Young Sun Consistent with Helioseismology and Warm Temperatures on Ancient Earth and Mars
The relatively warm temperatures required on early Earth and Mars have been difficult to account for via warming from greenhouse gases. We tested whether this problem can be resolved for both Earth
Clouds and the Faint Young Sun Paradox
Abstract. We investigate the role which clouds could play in resolving the Faint Young Sun Paradox (FYSP). Lower solar luminosity in the past means that less energy was absorbed on Earth (a forcing
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