What is the percentage of the Earth's warmth that the Earth's hot centre is responsible for? What would be the temperature of the atmosphere if the Earth's centre was 18° C (average temperature on the surface)?

  • 2
    $\begingroup$ partly relevant : i.imgur.com/wUb82yS.png $\endgroup$
    – shrey
    Commented Jan 9, 2017 at 8:19
  • $\begingroup$ @shrey Could you please share the whole document $\endgroup$
    – Probably
    Commented Jan 9, 2017 at 11:51
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    $\begingroup$ (around pg 221 ) -- elibrary.bsu.az/azad/new/2194.pdf $\endgroup$
    – shrey
    Commented Jan 9, 2017 at 11:59
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    $\begingroup$ 0.03% per Wikipedia: en.wikipedia.org/wiki/… $\endgroup$
    – userLTK
    Commented Jan 10, 2017 at 2:32
  • $\begingroup$ Why ask such a what-if about an 18° C core? $\endgroup$
    – wogsland
    Commented Jan 26, 2017 at 17:56

1 Answer 1


Given the insulating effect of 6370 km of rock (the average radius of the Earth) & its low thermal conductivity, if the temperature at the center of the earth was 18 °C it contribution to warming the atmosphere would be negligible.

The temperature at the center of the Earth is about 7000 °C, while the average temperature of the surface is about 10 °C. So if the temperature at the Earth's center was 18 °C its contribution to the surface temperature would be exceedingly small.


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