Is this new layer several million degrees, like Algore taught us?
Of course not but it is hot and there is a lot of pressure. I doubt Al is smart enough to understand the composition of the earth and the fact that most of the time the mantle and core have subtle short range impact on the surface climate but great influence in deep time. In fact the magnetic fields are the largest short term affect.
Al Gore: Earth's Interior 'Extremely Hot, Several Million Degrees'
By Noel Sheppard (newsbusters.org) | November 18, 2009
[snip]
CONAN O'BRIEN, HOST: ...to create energy, and it sounds to me like an evil plan by Lex Luthor to defeat Superman. Can you, can you tell me, is this a viable solution, geothermal energy?
AL GORE: It definitely is, and it's a relatively new one. People think about geothermal energy - when they think about it at all - in terms of the hot water bubbling up in some places, but two kilometers or so down in most places there are these incredibly hot rocks, 'cause the interior of the earth is extremely hot, several million degrees, and the crust of the earth is hot ...
[snip]
The physics and astronomy website Physlink contests Gore's absurd claim:
***It is approximately 4000°C [7,232°F] at the centre of the Earth***.
To put this in context:
1. The centre of the Sun is approximately 15 million°C
2. The surface of the Sun is 5500°C
3. Iron melts at 1535°C (when at atmospheric pressure)
4. Water boils at 100°C (when at atmospheric pressure)
5. Human skin is comfortable with temperatures up to about 60°C
6. The highest temperature recorded on the Earth's surface is 58°C (Libya 1922)It is not possible to directly measure the temperature at the centre of the Earth and four thousand degrees is nothing more than our most well-established piece of guesswork to date.
Most modern calculations rely on the fact that we believe the inner core to be made up of iron and nickel that is just about at melting point. It is under a lot of pressure, which prevents it from melting, even at such high temperatures. There is also a lot of evidence regarding how the outer core of the Earth convects and that helps to establish the temperature.
However, recently British scientists have suggested that the temperature of the Earth's core may in fact be as high as the surface of the Sun, so the question is still open.