A Radiative Seasonal Climate Model Applied to Saturn

Details A Radiative Seasonal Climate Model Applied to Saturn A Radiative Seasonal Climate Model Applied to Saturn

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.4201g&link_type=abstract

American Astronomical Society, DPS meeting #40, #42.01; Bulletin of the American Astronomical Society, Vol. 40, p.472

Astronomy and Astrophysics

Astronomy

Scientific paper

The strong temperature and hydrocarbon abundance variations with latitude in Saturn's stratosphere inferred from ground-based (Greathouse et al. 2005, Greathouse et al. 2006, Orton et al. 2008) and Cassini CIRS observations (Flasar et al. 2005, Howett et al. 2007, Fletcher et al. 2007, Fouchet et al. 2008) have yet to be reproduced by radiative or dynamic seasonal models. Saturn's axial tilt of 26.7° and historic mid-infrared imaging observations suggest that the temperature variations are seasonal in nature. As a first step in testing this hypothesis, we have created a fast heating/cooling multi-layer radiative transfer code that we use as the core of a radiative seasonal climate model. We present an explanation of the key aspects of the heating/cooling code.
Results from radiative seasonal climate model runs will be compared to recent observationally derived temperatures. A discussion of the sensitivity of the model derived temperatures to CH4, C2H2, and C2H6 abundances and a comparison of our model to the model of Bezard and Gautier 1985 will be presented.
The same planet independent heating/cooling code implemented in our radiative seasonal climate model is being incorporated into the global circulation model EPIC.
This work was funded by NASA PATM grants NNX08AE64G and NNX08AL95G.

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