The thermocline in Lake Challa is deeper than that typically observed in other
tropical crater lakes (e.g., Wood et al. 1976; Kling 1988; Schabetsberger et al. 2004;
Vazqez et al. 2004), but deep thermoclines have been observed for example in Lake
Barombi (~20-30m; Kling 1988) and Lake Kanyangeye (~40-45m; Melack 1978).