Assume that O2 in the mixed layer is 300 mmol m-3, and that it is in perfect equilibrium with the atmosphere. Photosynthesis rapidly produces 15 mmol m-3 of O2, without giving time to the mixed layer to equilibrate with the atmosphere (i.e., assume that the air-sea fluxes is zero). Q. What will be the new saturation anomaly of the mixed layer (?O2), relative to equilibrium? ? -20% ? +20%