What is the definition of themocline?

Answer 1

Thermocline describes a steep temperature in a body of water. This temperature is gradient and can be in bodies of water such as lakes and ponds.

Answer 2

The thermocline is a distinct layer in a body of water where the temperature changes rapidly with depth. It separates the warmer surface layer from the colder deeper layer in oceans and lakes, creating a barrier to mixing between the two layers.