Apparent oxygen utilisation

In freshwater or marine systems apparent oxygen utilization (AOU) is the difference between oxygen gas solubility (i.e. the concentration at saturation) and the measured oxygen concentration in water with the same physical and chemical properties.^[1]

$AOU=[O_{2}\ solubility]-[O_{2}\ observed]$

^ Garcia, H.E., Locarnini, R.A., Boyer, T.P. and Antonov, J.I. (2006). World Ocean Atlas 2005 Volume 3: Dissolved Oxygen, Apparent Oxygen Utilization, and Oxygen Saturation.^{[permanent dead link]} S. Levitus, Ed. NOAA Atlas NESDIS 63, U.S. Government Printing Office, Washington, D.C., 342 pp.

[1] Garcia, H.E., Locarnini, R.A., Boyer, T.P. and Antonov, J.I. (2006). World Ocean Atlas 2005 Volume 3: Dissolved Oxygen, Apparent Oxygen Utilization, and Oxygen Saturation.^{[permanent dead link]} S. Levitus, Ed. NOAA Atlas NESDIS 63, U.S. Government Printing Office, Washington, D.C., 342 pp.

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