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Earth's Heat Flow in the Past

  1. Aug 27, 2012 #1


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    Staff: Mentor

    What effects would having 2-3 times the current heat flow of the Earth have had in the past? Would this have had a significant effect on global temperatures?
  2. jcsd
  3. Aug 27, 2012 #2
    The average geothermal heat is 0.061 w/m2 which is some 4 orders of magnitude less than the energy balance of the earth surface. Hence no significant effect.
  4. Aug 27, 2012 #3
    Convection in the mantle would have been more vigorous. This would have increased volcanism and seismicity at the surface.
  5. Aug 27, 2012 #4
    If it is true that there would have been more volcanism, would this not have had an indirect effect due to more frequent bursts of aerosols + volcanic gasses?
  6. Aug 27, 2012 #5


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    Staff: Mentor

    It has been known to cause cooling.

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