Analytic investigation of climate stability on Titan: sensitivity to volatile inventory

Details Analytic investigation of climate stability on Titan: sensitivity to volatile inventory Analytic investigation of climate stability on Titan: sensitivity to volatile inventory

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999p%26ss...47.1503l&link_type=abstract

Planetary and Space Science, Volume 47, Issue 12, p. 1503-1515.

Computer Science

23

Scientific paper

We develop a semiempirical grey radiative model to quantify Titan's surface temperature as a function of pressure and composition of a nitrogen-methane-hydrogen atmosphere, solar flux and atmospheric haze. We then use this model, together with non-ideal gas-liquid equilibrium theory to investigate the behavior of the coupled surface-atmosphere system on Titan. We find that a volatile-rich Titan is unstable with respect to a runaway greenhouse-small increases in solar luminosity from the present value can lead to massive increases in surface temperature. If methane has been photolyzed throughout Titan's history, then this runaway can only be avoided if the photolytic ethane is removed from the surface-atmosphere system.

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