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Triton's Global Heat Budget.

R H Brown, T V Johnson, J D Goguen

    Science (New York, N.Y.)
    |March 22, 1991
    PubMed
    Summary
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    Triton

    Area of Science:

    • Planetary Science
    • Geophysics
    • Atmospheric Science

    Background:

    • Triton's energy balance is influenced by internal heat flow and absorbed thermal energy from Neptune.
    • This internal heat is a significant fraction of Triton's absorbed insolation.

    Purpose of the Study:

    • To quantify the impact of internal heat flow on Triton's surface temperature and atmospheric pressure.
    • To investigate potential implications for Triton's surface albedo and atmospheric dynamics.

    Main Methods:

    • Analysis of energy balance models for Triton.
    • Estimation of temperature and pressure variations based on internal heat flux.

    Main Results:

    • Internal heat sources raise Triton's surface temperature by 0.5–1.5 K.

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  • This leads to a 1.5–2.5 times increase in basal atmospheric pressure.
  • Concentrated heat flow may cause significant local albedo modifications through enhanced sublimation.

    • Conclusions:

    • Triton's internal heat flow plays a crucial role in its surface energy balance and atmospheric pressure.
    • Recent global albedo changes suggest Triton's atmosphere may not be in a steady state, with potentially higher past pressures.