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Climate of Extraterrestrial Planets with Oceans and Carbonate-Silicate Geochemical Cycle Under Various Obliquities

Published online by Cambridge University Press:  29 April 2014

Yoshiyasu Watanabe ,
Eiichi Tajika  and
Shintaro Kadoya
Yoshiyasu Watanabe
Affiliation:
Dept. of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan email: [email protected]
Eiichi Tajika
Affiliation:
Dept. of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan email: [email protected] Dept. of Complexity Science and Engineering, The University of Tokyo, Chiba 277-8561, Japan email: [email protected]
Shintaro Kadoya
Affiliation:
Dept. of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan email: [email protected]
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Abstract

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We systematically investigated the climate of water-rich terrestrial planets with a negative feedback mechanism of carbonate-silicate geochemical cycle against the climate under various obliquities and semi-major axes. We found that, while the permanent ice-cap mode (partially ice-covered throughout the year) and the seasonal ice-cap mode (partially ice-covered seasonally) exist stably at low obliquity conditions, the ranges of semi-major axis for these climate modes shrink and finally disappear with an increase of obliquity. When carbonate-silicate geochemical cycle is taken into account, the ranges of semi-major axis for all the climate modes expand at any obliquities, compared with the cases without carbonate-silicate geochemical cycle, indicating that the carbonate-silicate geochemical cycle strongly stabilizes the climate for the planets with any obliquities inside the habitable zone.

Keywords

astrobiologyplanets and satellites: generalEarth
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S293: Formation, Detection, and Characterization of Extrasolar Habitable Planets , August 2012 , pp. 333 - 335
Copyright
Copyright © International Astronomical Union 2014 

References

Berner, R. 1994, Am. J. Sci., 294, 56CrossRefGoogle Scholar
Kasting, J. F., Whitmire, D. P., & Reynolds, R. T. 1993, Science, 259, 920CrossRefGoogle Scholar
North, G. R., Cahalan, R. F., & Coakley, J. A. 1981, Rev. Geophys. Space. Phys., 19, 91CrossRefGoogle Scholar
Spiegel, D. S., Menou, K., & Scharf, C. A. 2009, ApJ, 691, 596CrossRefGoogle Scholar
Walker, J. C. G., Hays, P. B., & Kasting, J. F. 1981, J. Geophys. Res., 86, 9776CrossRefGoogle Scholar
Williams, D. M. & Kasting, J. F. 1997, Icarus, 129, 254CrossRefGoogle Scholar
Williams, D. M. & Pollard, D. 2003, Int. J. Astrobiology, 2, 1Google Scholar