Re: Temperature gradient inside a body with gravity

And this is supposed to be significant how?

You are working on averages, not temperature gradients at specific
locations. Temp gradients under Yellowstone NP, USA, for example,
greatly exceed the 'average' number. The temp gradient beneath other
places doesn't even reach the 20-25 K/km you cite.

If you are trying to draw some data to justify/deny global warming, it
doesn't strike me that earth's gravitational heat gradient (as you call
it) is anything people can influence without reducing the mass of the
planet. Therefore, it should be considered an overall constant, not a
controllable variable for total heat in the system.

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