Titan's Snowline |
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Authors: | Ralph D LorenzJonathan I Lunine |
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Institution: | a Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona, 85721-0092, f1rlorenz@lpl.arizona.eduf1b Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona, 85721-0092 |
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Abstract: | We show that the “snowline” altitude on Titan, above which the condensed nonideal methane-nitrogen phase is solid, is lower (∼14 km) near the equator than at high latitudes (∼19 km). This counterintuitive result derives from the thermodynamic behavior of the binary condensate. The snowline altitude is an operating constraint on future Titan missions where icing would pose a ceiling on atmospheric flight. These snowline altitudes are higher than likely topography, suggesting that optically bright regions on Titan are not due to veneering caused by methane frost deposition. |
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Keywords: | Titan |
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