Re: Temperature gradient inside a body with gravity

On Nov 28, 3:43 pm, Jo Schaper <jonot34schape...@xxxxxxxxxxxxxxx>
wrote:
And this is supposed to be significant how?

Sure, since it differs by a factor of two.

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.

I use the global average in the crust.

Check what the specific heat and the thermal coductivity is of that
rock and we can see how much the gravitational and the heat conducting
thermal gradient is.

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.

It can be controlled by adjusting the specific heat of the material it
is is. This is ofcourse also hard.

In fact we have a lot of heat in the earth interior without fusion or
heat left over from ancient times. The same is for the sun and the
planets. The sun and the gas planets would be worth investigating.
They probably are already since an similar theory is applied to
fluids, the lapse rate. It must apply to solids as well.

On the discussion page on Wikipedia's article on athmosperic lapse
rate they have the same equation 3.2 (in the German version)
http://de.wikipedia.org/wiki/Temperaturgradient_%28Meteorologie%29

David
.

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