The transfer of heat occurs at a certain temperature gradient.

The water is so cold that there's virtually no temperature gradient.

In addition to the temperature gradient, the wind conditions and the season can also have an effect.

The temperature gradient in this part of the Sun was tiny.

They also tend to concentrate where a high temperature gradient is found.

With the surrounding water creating a temperature gradient, that's not possible.

In the summer, the temperature gradient actually helps to cool the house.

This driving force can be an electric field or a temperature gradient.

This means there is a temperature gradient between them, and the Earth system always seeks to even out these differences.

During the summer, the temperature gradient helps to cool the house.