Toward a solution to the early faint Sun paradox: A lower cosmic ray flux from a stronger solar wind

  title={Toward a solution to the early faint Sun paradox: A lower cosmic ray flux from a stronger solar wind},
  author={Nir J. Shaviv},
  journal={Journal of Geophysical Research},
  • N. Shaviv
  • Published 23 June 2003
  • Physics
  • Journal of Geophysical Research
[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 existence. Yet, running water is observed to have been present since very early in Earth's history. This enigma is known as the faint Sun paradox. We show here that it can be partially resolved once we consider the cooling effect that cosmic rays are suspected to have on the global climate and by… 

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