The temperature of the Earth’s core is said to be around 5430 °C. On the other hand, the bottom of the oceans drops to minus degrees.
Logically, shouldn’t the temperature of the water increase as we get closer to the Earth’s core? When you think of plain logic, yes, but the situation is a little more complicated than that.
There are certain layers.
Temperature inside the Earth; As it moves from the core to the surface, it encounters insulating layers such as the earth’s crust, the upper part of the mantle and the water layer. These layers make it very difficult for heat to move upwards.
Thus, the temperature of the Earth’s core cannot easily reach the oceans. Of course, this is not the only reason, let’s continue.
Ocean waters are losing the heat they receive from the sun.
The water on the surface of the oceans is heated by the energy coming from the sun, but this sunlight does not reach the depths. The heat received from the sun disappears by evaporation and cools. As the water cools, it becomes denser and sinks to the bottom.
This is called heat convection of water, and it occurs in the form of hot water remaining on the surface and colder water sinking to the bottom. For this reason, ocean waters remain cold.
The amount of oceans should not be underestimated.
Since the oceans contain such a large amount of water, it is difficult for heat from the surface to spread throughout the ocean.
In addition, a large amount of the heat flow coming from the core to the earth is lost as it slowly passes through the mantle, and this heat flow remains very little on the ocean floor.
Pressure does not increase temperature.
Although we might think that pressure would increase temperature, this is not true for incompressible liquids such as water. After all, water is a mostly incompressible liquid. Although the pressure increases as you go deeper, the water does not become hotter.
For all these reasons we have mentioned, the depths of the ocean do not warm up even though they are close to the Earth’s core.
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