Nitrogen-enhanced greenhouse warming on early Earth

@article{Goldblatt2009NitrogenenhancedGW,
  title={Nitrogen-enhanced greenhouse warming on early Earth},
  author={C. Goldblatt and M. Claire and T. Lenton and A. Matthews and A. Watson and K. Zahnle},
  journal={Nature Geoscience},
  year={2009},
  volume={2},
  pages={891-896}
}
Early in Earth’s history, the Sun provided less energy to the Earth than it does today. However, the Earth was not permanently glaciated, an apparent contradiction known as the faint young Sun paradox. By implication, the Earth must have been warmed by a stronger greenhouse effect or a lower planetary albedo. Here we use a radiative–convective climate model to show that more N2 in the atmosphere would have increased the warming effect of existing greenhouse gases by broadening their absorption… Expand

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