Summary of experimental settings and measured fluxes.

Experiments were performed at constant voltages and occasionally with an undulating voltage at 0.3 Hz. Mean velocity u¯ , Reynolds stress w'u' ¯ , and variance u'u' ¯ measured at the tip of the sensors are listed. The orientation of the electrochemical sensors varied and is expressed as the angle between mean flow direction and sensor. The longitudinal and vertical fluxes are given with the corresponding probability of the null hypothesis (i.e. zero correlation between velocity and O2 time series). Extremely low probabilities are presented in scientific notation. The asterisk marks non-significant fluxes (p>0.05). Summary of experimental settings and measured fluxes.