ENV100H1 Lecture Notes - Lecture 16: Kelp Forest, Monomictic Lake, Upwelling
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ENV100H1 Full Course Notes
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Density of freshwater max density at 4c density decreases faster and faster as temp increases very small di erences in density. 4c sinks to bottom bottom is always liquid water (aquatic system underneath ice) solid phase has lower density that liquid phase ice formation at top- shield aquatic system from further cooling stable aquatic system beneath ice. Dimictic lake temperate areas , with ice cover. Monomictic lakes cold monimictic not much di erence in density open landscape-alot of wind (no vegetation to block it) mixing when lake is ice-free. Warm monomictic lakes sun heats water- creating thermocline. Polymictic lakes (shallow relative to wind forcing) strong wind- mixing of whole water column mix many times a year if they lose all their oxygen they will be mixed again and oxygen will be replenished. Meromictic lakes (partial mixing) natural small deep sheltered lakes very deep lakes hills surround lake- not enough wind energy never have enough wind energy to mix bottom layer.
