Question

why are the upper layers of water in a pond hotter

Answer 1

because Asha Maid hilly areas it get the upper layer of the water gets cool as in the summer area and what areas in that move escorted in the oven because the below players who gets heated up comes up then another layer Gods down

Answer 2

This is because hot/ warm water is more dense than colder water. Hence, when water in the pond gets heated, it's warmer near the top as the cold water sinks down.