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An unexpected feature of Titan's atmosphere is the strong depletion inprimordial noble gases revealed by the Gas Chromatograph Mass Spectrometeraboard the Huygens probe during its descent on 2005 January 14. Althoughseveral plausible explanations have already been formulated, no definitiveresponse to this issue has been yet found. Here, we investigate the possiblesequestration of these noble gases in the liquid contained in lakes and wetterrains on Titan and the consequences for their atmospheric abundances.Considering the atmosphere and the liquid existing on the soil as a wholesystem, we compute the abundance of each noble gas relative to nitrogen. To doso, we make the assumption of thermodynamic equilibrium between the liquid andthe atmosphere, the abundances of the different constituents being determinedvia {\bf } regular solution theory. We find that xenon's atmospheric depletioncan be explained by its dissolution at ambient temperature in the liquidpresumably present on Titan's soil. In the cases of argon and krypton, we findthat the fractions incorporated in the liquid are negligible, implying that analternative mechanism must be invoked to explain their atmospheric depletion.

About the possible role of hydrocarbon lakes in the origin of Titan's noble gas atmospheric depletion