thermocline
/ˈθɜrməˌklaɪn/
noun
- A layer in a body of water (such as a lake or ocean) where the temperature changes rapidly with depth, separating warmer surface water from colder deep water.
- Scientists study the thermocline to understand how ocean currents affect climate.
- Divers can feel a sudden drop in temperature when they pass through the thermocline.
- Fish often stay near the thermocline because the temperature is comfortable for them.