Obliquity Effects on Earth-like Exoplanet Signatures

Details Obliquity Effects on Earth-like Exoplanet Signatures Obliquity Effects on Earth-like Exoplanet Signatures

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.6815o&link_type=abstract

American Astronomical Society Meeting 207, #68.15; Bulletin of the American Astronomical Society, Vol. 37, p.1268

Astronomy and Astrophysics

Astronomy

Scientific paper

The NASA/GISS Model II (Ed GCM) was used to predict the effects of high obliquity on climate for Earth-like extra-solar planets. Lack of a fully dynamic ocean prevented reversal of ocean heat transport so that study was limited to obliquities lower than 54°. These results were then used to explore a possible range of difference from Earth's current spectra and albedo. Trends toward lower levels of snow, ice and total cloud cover for higher obliquities led to globally darker planets with higher levels of atmospheric water vapor. Low cloud cover led to stronger absorption lines, whereas increased water vapor had little affect on spectra.

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