Cited by 396Astro and Planetary SciencePaleontology and Stratigraphy of FossilsEarth Systems and Cosmic Evolution

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The Early Faint Sun Paradox: Organic Shielding of Ultraviolet-Labile Greenhouse Gases

Sagan, Carl, Chyba, Christopher·1997·Science

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Abstract

Atmospheric mixing ratios of ∼10 −5 ± 1 for ammonia on the early Earth would have been sufficient, through the resulting greenhouse warming, to counteract the temperature effects of the faint early sun. One argument against such model atmospheres has been the short time scale for ammonia photodissociation by solar ultraviolet light. Here it is shown that ultraviolet absorption by steady-state amounts of high-altitude organic solids produced from methane photolysis may have shielded ammonia sufficiently that ammonia resupply rates were able to maintain surface temperatures above freezing.

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Bacterial evolution
Woese, C. R. (1987) · Microbiological Reviews · doi:10.1128/mr.51.2.221-271.1987 · Cited by 5,042
The Chemical Evolution of the Atmosphere and Oceans
Holland, H. D. (1984) · doi:10.1515/9780691220239 · Cited by 1,836
The Carbon Cycle and Atmospheric CO2 : Natural Variations Archean to Present
Sundquist, E. T., & Broecker, W. S. (1985) · Geophysical monograph · doi:10.1029/gm032 · Cited by 1,659
Organic Compound Synthesis on the Primitive Earth
Miller, S. L., & Urey, H. C. (1959) · Science · doi:10.1126/science.130.3370.245 · Cited by 1,403
Evidence for life on Earth before 3,800 million years ago
Mojzsis, S. J., Arrhenius, G., McKeegan, K. D., Harrison, T. M., Nutman, A. P., & Friend, C. R. L. (1996) · Nature · doi:10.1038/384055a0 · Cited by 1,370
Endogenous production, exogenous delivery and impact-shock synthesis of organic molecules: an inventory for the origins of life
Chyba, C., & Sagan, C. (1992) · Nature · doi:10.1038/355125a0 · Cited by 1,321
Self-citation
Earth and Mars: evolution of atmospheres and surface temperatures
Sagan, C., & Mullen, G. (1972) · Science · doi:10.1126/science.177.4043.52 · Cited by 942
Self-citation
Optical constants from the far infrared to the x-ray region: Mg, Al, Cu, Ag, Au, Bi, C, and Al_2O_3
Hagemann, H. ‐., Gudat, W., & Kunz, C. (1975) · Journal of the Optical Society of America · doi:10.1364/josa.65.000742 · Cited by 897
Solar interior structure and luminosity variations
Gough, D. O. (1981) · Solar Physics · doi:10.1007/bf00151270 · Cited by 798
Ancient oceans, ice sheets and the hydrological cycle on Mars
Baker, V. R., Strom, R. G., Gulick, V. C., Kargel, J. S., Komatsu, G., & Kale, V. S. (1991) · Nature · doi:10.1038/352589a0 · Cited by 714

Show all 92 references

Research works printed but not linked: 15

Wang W. C., Stoner P. H., ibid. 37, 545 (1980) .
Eiler J. M., Mojzsis S. J., Arrhenius G., ibid. 386, 665 (1997).
Karhu J., Epstein S., ibid. 50, 1745 (1986)].
]. On an Earth as warm as or warmer than today cloud feedback effects do not seem to be the answer [J. F. Kasting and D. H. Grinspoon in The Sun in Time C. P. Sonett M. S. Giampapa M. S. Matthews Eds. (Univ. of Arizona Press Tucson 1991) pp. 447–462].
J. B. Pollack and C. Sagan in Near Earth Resources J. Lewis and M. Matthews Eds. (Univ. of Arizona Press Tucson 1993)
J. M. Goldspiel thesis Cornell University (1994). An upper limit on the total amount of CO 2 ice in a martian polar cap can be set by the condition that it not liquefy at its base as a result of hydrostatic pressure load giving an upper limit of ∼60 mbar CO 2 [
Sagan C., J. Geophys. Res. 78, 1250 (1973)].
Khare B. N., Sagan C., Bandurski E. L., Nagy B., ibid. 199, 1199 (1978)].
Sagan C., Thompson W. R., ibid. 59, 133 (1984).
CH 4 is present at 0.1 to 1% of [H 2 O] in comets [M. J. Mumma P. R. Weissman S. A. Stern in Protostars and Planets III E. H. Levy and J. I. Lunine Eds. (Univ. of Arizona Tucson 1993) pp. 1177–1252]. For an impactor mass flux ∼5 × 10 14 g year −1 around 4 Ga (11) exogenous CH 4 supply provided <1% of the required flux.
C. F. Chyba T. C. Owen W.-H. Ip in Hazards Due to Comets and Asteroids T. Gehrels Ed. (Univ. of Arizona Press Tucson 1994) pp. 9–58.
C. Sagan B. N. Khare J. Lewis in Saturn T. Gehrels and M. S. Matthews Eds. (Univ. of Arizona Press Tucson 1984) pp. 788–807.
Jenniskens P., Astron. Astrophys. 272, 465 (1993).
Greenberg J. M., Hage J. I., ibid. 361, 260 (1990).
Bussoletti E., Colangeli L., Borghesi A., Orofino V., Astron. Astrophys. Suppl. Ser. 70, 257 (1987).

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Authors: Sagan, C., & Chyba, C.
Affiliations: University of Arizona (US)
ORCID: Sagan, Carl
Chyba, Christopher
Venue: Science
Publisher: American Association for the Advancement of Science (AAAS)
Published: 1997-05-23
Volume: 276
Issue: 5316
Pages: 1217-1221
ISSN: 0036-8075 (ISSN-L)
1095-9203
DOI: 10.1126/science.276.5316.1217
OpenAlex: W1964099544
Cited by: 396
References: 92
Citations by year: 2026: 7 · 2025: 10 · 2024: 12 · 2023: 11 · 2022: 8 · 2021: 9 · 2020: 18 · 2019: 5 · 2018: 14 · 2017: 14 · 2016: 11 · 2015: 7 · 2014: 16 · 2013: 25 · 2012: 17
FWCI: 14.02
Type: journal article
Language: en
Open access: closed
Locations: Science (publishedVersion)
PubMed (publishedVersion)
Topics: Physical Sciences › Earth and Planetary Sciences › Space and Planetary Science › Astro and Planetary Science
Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
Physical Sciences › Environmental Science › Global and Planetary Change › Earth Systems and Cosmic Evolution
Keywords: early Earth, ammonia, greenhouse gases, UV protection, organic solids, methane photolysis, ammonia photodissociation, atmospheric mixing ratios, surface temperature, early atmosphere
MeSH terms: Ammonia, Atmosphere, Carbon Dioxide, Methane, Models, Chemical, Photolysis, Ultraviolet Rays, Solar System, Greenhouse Effect, Earth, Planet, Evolution, Planetary

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The Early Faint Sun Paradox: Organic Shielding of Ultraviolet-Labile Greenhouse Gases

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