Coupled atmosphere-ocean models of Titan's past

Computer Science

Scientific paper

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Atmospheric Models, Methane, Nitrogen, Ocean Models, Satellite Atmospheres, Surface Temperature, Titan, Convective Heat Transfer, Greenhouse Effect, Planetary Evolution, Radiative Heat Transfer, Solar Constant, Saturn, Satellites, Titan, Atmosphere, Model, Surface, Thermodynamics, Radiative Transfer, Convection, Methane, Enrichment, Ethane, Nitrogen, Temperature, Compostion, Ice, History, Condensation, Thermal Effects, Heating, Accretion, Solubility, Flux, Comparisons, Pressure, Volatiles, Stability, Timesc

Scientific paper

The behavior and possible past evolution of fully coupled atmosphere and ocean model of Titan are investigated. It is found that Titan's surface temperature was about 20 K cooler at 4 Gyr ago and will be about 5 K warmer 0.5 Gyr in the future. The change in solar luminosity and the conversion of oceanic CH4 to C2H6 drive the evolution of the ocean and atmosphere over time. Titan appears to have experienced a frozen epoch about 3 Gyr ago independent of whether an ocean is present or not. This finding may have important implications for understanding the inventory of Titan's volatile compounds.

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