"A lake which is permanently covered by ice, does not mix, and exhibit inverse cold water stratification whereby water temperature increases with depth below the ice surface."^^ . "ENVO"^^ . . . _:b1218443 . "2013-10-15T17:08:47Z"^^ . _:b1218443 . _:b1218443 . _:b1218443 . "ENVO:01000284"^^ . "amictic lake"^^ . . "pbuttigieg"^^ .