Cited by 206Astro and Planetary SciencePlanetary Science and ExplorationStellar, planetary, and galactic studies

The Greenhouse and Antigreenhouse Effects on Titan

McKay, Christopher P., Pollack, James B., Courtin, Régis·1991·Science

Abstract

There are many parallels between the atmospheric thermal structure of the Saturnian satellite Titan and the terrestrial greenhouse effect; these parallels provide a comparison for theories of the heat balance of Earth. Titan's atmosphere has a greenhouse effect caused primarily by pressure-induced opacity of N 2 , CH 4 , and H 2 . H 2 is a key absorber because it is primarily responsible for the absorption in the wave number 400 to 600 cm -1 "window" region of Titan's infrared spectrum. The concentration of CH 4 , also an important absorber, is set by the saturation vapor pressure and hence is dependent on temperature. In this respect there is a similarity between the role of H 2 and CH 4 on Titan and that of CO 2 and H 2 O on Earth. Titan also has an antigreenhouse effect that results from the presence of a high-altitude haze layer that is absorbing at solar wavelengths but transparent in the thermal infrared. The antigreenhouse effect on Titan reduces the surface temperature by 9 K whereas the greenhouse effect increases it by 21 K. The net effect is that the surface temperature (94 K) is 12 K warmer than the effective temperature (82 K). If the haze layer were removed, the antigreenhouse effect would be greatly reduced, the greenhouse effect would become even stronger, and the surface temperature would rise by over 20 K.

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Crossref · 10.1126/science.11538492

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  • Too much CH4 relative to CO2 would create the high-altitude organic haze, which may cool Earth by up to ~20 K by absorbing incoming solar radiation and radiating energy back to space in a so-called anti-greenhouse effect.

    “However, too much CH4 relative to CO2 would create the high-altitude organic haze mentioned earlier, which may cool Earth by up to ~20 K (1, 215) by absorbing incoming solar radiation and radiating energy back to space in a so-called “anti-greenhouse effect” (216).”

    From The Archean atmosphere (2020) · cites this paper as [216]

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Authors
McKay, C. P., Pollack, J. B., & Courtin, R.
Affiliations
  • Ames Research Center (US)
  • Observatoire de Paris (FR)
Venue
Science
Published
1991-09-06
Volume
253
Issue
5024
Pages
1118-1121
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1487362804
Cited by
206
References
15
Citations by year
2026: 7 · 2025: 11 · 2024: 6 · 2023: 6 · 2022: 3 · 2021: 5 · 2020: 9 · 2019: 7 · 2018: 6 · 2017: 6 · 2016: 5 · 2015: 8 · 2014: 10 · 2013: 7 · 2012: 13
FWCI
1.43
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • NASA Technical Reports Server (NASA)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Planetary Science and Exploration
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
Keywords
Titan, greenhouse effect, atmospheric temperature structure, surface temperature, effective temperature, atmospheric haze, hydrogen absorption, methane absorption, heat balance, Saturnian satellites
MeSH terms
Atmosphere, Extraterrestrial Environment, Hydrogen, Methane, Models, Theoretical, Nitrogen, Photolysis, Spectrum Analysis, Temperature, Solar System, Greenhouse Effect, Earth, Planet, Saturn

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