Cited by 338Paleontology and Stratigraphy of FossilsGeology and Paleoclimatology ResearchEarth Systems and Cosmic Evolution

The faint young Sun problem

Open access
Feulner, Georg·2012·Reviews of Geophysics

Abstract

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 evidence for the presence of liquid surface water and even life in the Archean (3.8 to 2.5 billion years before present), so some effect (or effects) must have been compensating for the faint young Sun. A wide range of possible solutions have been suggested and explored during the last four decades, with most studies focusing on higher concentrations of atmospheric greenhouse gases like carbon dioxide, methane, or ammonia. All of these solutions present considerable difficulties, however, so the faint young Sun problem cannot be regarded as solved. Here I review research on the subject, including the latest suggestions for solutions of the faint young Sun problem and recent geochemical constraints on the composition of Earth's early atmosphere. Furthermore, I will outline the most promising directions for future research. In particular I would argue that both improved geochemical constraints on the state of the Archean climate system and numerical experiments with state‐of‐the‐art climate models are required to finally assess what kept the oceans on the Archean Earth from freezing over completely.

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Crossref · 10.1029/2011rg000375

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  • Liquid water was already present at the Earth's surface during the Hadean and Archean eons.

    “liquid water was already present at the surface during the Hadean (4.56 Ga to ≈ 4.0 Ga 1 ) and Archean eons ( ≈ 4.0 Ga to 2.4 Ga)”

    From The young Sun's XUV-activity as a constraint for lower CO2-limits in the Earth's Archean atmosphere (2021) · cites this paper as Feulner, 2012

    Section 2.2 [19] explicitly reports evidence of liquid surface water during both the Hadean and Archean. The dates in the citing sentence do not fully match the review’s definitions: it uses 3.8 Ga for the boundary and 2.5 Ga for the end of the Archean, though it acknowledges that the boundary is often set at 4.0 Ga. (LLM, conf=0.88)

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  • Liquid water under a fainter Sun likely implies more abundant greenhouse gases than today.

    “Liquid water under a fainter Sun likely implies more abundant greenhouse gases than today (14, 15).”

    From The Archean atmosphere (2020) · cites this paper as [15]

  • Solar evolution models show that the Sun was 25 to 30% fainter at 4 Ga ago.

    “Solar evolution models show that the Sun was 25 to 30% fainter at 4 Ga ago (12, 13, 15).”

    From The Archean atmosphere (2020) · cites this paper as [15]

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5 of the 297 references couldn’t be matched to a known paper.

Research works printed but not linked: 6

  1. Denman, K. L., et al. (2007), Couplings between changes in the climate system and biogeochemistry, in Climate Change 2007: The Physical Science Basis: Working Group I Contribution to the Fourth Assessment Report of the IPCC, edited by S. Solomon et al., pp. 501-587, Cambridge Univ. Press, New York.
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  5. Stone, P. H. (1972), A simplified radiative-dynamical model for the static stability of rotating atmospheres, J. Atmos. Sci., 29, 405-418, doi:10.1175/1520-0469(1972)029<0405:ASRDMF>2.0. CO;2. · DOI
  6. Walker, J. C. G. (1976), Implications for atmospheric evolution of the inhomogeneous accretion model of the origin of the Earth, in The Early History of the Earth, edited by B. F. Windley, pp. 537-546, John Wiley, Chichester, U. K.

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Authors
Feulner, G.
Affiliations
Potsdam Institute for Climate Impact Research (DE)
Corresponding author
Feulner, Georg
Venue
Reviews of Geophysics
Published
2012-05-25
Volume
50
Issue
2
ISSN
  • 0096-1043 (ISSN-L)
  • 8755-1209
  • 1944-9208
OpenAlex
W2092626416
Cited by
338
References
297
Citations by year
2026: 19 · 2025: 25 · 2024: 26 · 2023: 19 · 2022: 19 · 2021: 30 · 2020: 35 · 2019: 39 · 2018: 23 · 2017: 23 · 2016: 15 · 2015: 24 · 2014: 13 · 2013: 19 · 2012: 4
FWCI
14.27
Type
journal article
Language
en
Open access
Locations
  • Reviews of Geophysics (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Publication Database PIK (Potsdam Institute for Climate Impact Research (PIK)) (submittedVersion, other-oa)
  • arXiv (Cornell University)
Funders
Stonehill College
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Earth Systems and Cosmic Evolution
Keywords
early Earth atmosphere, greenhouse gases, carbon dioxide, methane, ammonia, paleoclimate, climate models

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