hypolimnion
/ˌhaɪpoʊˈlɪmniˌɑn/
noun
- The deep, cold, dense layer of water in a lake, below the thermocline, that does not mix with the upper layers.
- Oxygen levels in the hypolimnion can drop during summer due to decomposition.
- Researchers collected water samples from the hypolimnion to study nutrient cycling.
- The hypolimnion of the lake remains at a constant cold temperature year-round.
Antonyms