Re: Temperature of the Earth's inner core

On Jan 29, 11:36 pm, lindwall.j...@xxxxxxxxx wrote:
I've been trying for a couple days now to find out what the
temperature of the earth's inner core was estimated to be over the
past century and I was hoping that one of you might shine a bit of
light on the subject. The oldest estimate I've been able to find so
far was from 1969 and that was 3,000-5000 degrees celsius. While this
does differ from the estimates of today, it's only a single source (a
science textbook) and I was hoping I could find more. Ideally, I'd
like to find estimates from anywhere around the 1930's all the way
through the 1950's.

If anyone happens to know about the history of the estimated pressure
at the earth's center, that would be greatly appreciated as well but
I'm under the impression right now that that has been much more
constant.

Thats probably true, as temperature is harder to arrive
at than density structure which is what determines pressure.
Really, the first guys to really make a stab at this
problem, are fellows by the names of Erskine Williamson and Leason
Adams.
Geophysics students know these two as the founders of the Williamson-
Adams
equation which is what Geophysicists used to boostrap their way
through
the Earth's ineterior and derive density, temperature and Pressure
conditions
based on seismic velocity variations.

Russ Hemley of the Carnegie Institute in D.C. wrote an excellent
article
on these two in a recent edition of Physics Today. They were pioneers
in the determination of earth structure.

Yours,

Stuart
.

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