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When we analysed the correlation between the temperature and velocities using the Wavalet coherence transform (WCT) we found that:

●There is a strong correlation between velocities at frequencies that match that of the duration of the upwelling events which bring cold water (4-12 days).

●This makes sense because although the more stationary 1 h oscillation may be considered a major driver of flushing in Toronto Harbour, its back and forth sloshing movements bring water in and out of roughly the same temperature, while upwellings bring cold hypolimnetic water.