Temperature in Earth Flashcards
1
Q
What is temperature in the earth?
A
Temperature is imprecisely known compared to structure
2
Q
What is surface-gradient measured to be?
A
Near-surface gradient is measured to be: ~30°C/km
3
Q
What does this mean?
A
For every kilometre you go downwards, the temperature increases by around 30°C. However, this is not realistic
4
Q
What are the depth profiles of Geothermal and solidus?
A
In the outer core the actual temperature greatly exceeds the solidus, and hence it is liquid. In the aesthenosphere the actual temperature is a little higher than the solidus, and partially molten (but only a few %)
5
Q
What is Geotherm?
A
Temperature profiled with depth
6
Q
What is solidus?
A
Melting point with depth
