Consider an RBRconcerto³ C.T.D.DO logger, where the DO channel is a RBRcoda ODO. The RBRcoda ODO transfers both the foil temperature and the dissolved oxygen concentration (not compensated for salinity). The RBRconcerto³ calculates the concentration compensated for salinity first, then the air saturation (in %) via the following equation: where
Solubility is calculated via Gordon and Garcia as: where S is the salinity in PSU and Ts is defined as: with T being the water temperature in °C and: Air vapour pressure (in dbar) is calculated as: The corresponding logger coefficients are:
The O2 saturation equation was revised in firmware 1.094 of the RBRconcerto3, RBRmaestro3, RBRduo3, RBRlegato3 and RBRargo3. For the previous implementation of this equation, refer to the version B of this document. |
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