hypolimnion
/ˌhʌɪpə(ʊ)ˈlɪmnɪən
/noun (plural hypolimnia /ˌhʌɪpə(ʊ)ˈlɪmnɪə/)
The lower layer of water in a stratified lake, typically cooler than the water above and relatively stagnant.MeHg accumulated in the hypolimnion of Lake 240 when oxygen was present....
- The mean acoustic size of rising bubbles decreased in the hypolimnion but increased in the epilimnion.
- Both ponds are dystrophic, surrounded by extensive mats of Sphagnum, and stratified in summer with anoxic hypolimnia.
Origin
Early 20th century: from hypo- 'below' + Greek limnion (diminutive of limnē 'lake').