Correlation of Temperature and Velocities – Outer Harbour

• The Wavelet Coherence Transform suggests a correlation at periods matching that of upwelling events (freq. & duration)
• WCT shows that this correlation exists only during the stratified season

• Upwelling events are the most influential in driving the temperature in Toronto Harbour

Correlation:

• Velocity-Temperature
• Black contour 95% confidence level

Notes:

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.