O2 - compensated for pressure and salinity

Let us consider the RBRconcerto³ C.T.D.ODO, where the ODO channel is an integrated RBRcoda3 T.ODO. The RBRcoda3 T.ODO transfers both the foil temperature and the dissolved oxygen concentration (not compensated for salinity). The RBRconcerto³ calculates the concentration compensated for salinity and pressure first:

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where

  • O2corr is the corrected O2 concentration, compensated for salinity and pressure,

  • O2unc is the uncompensated O2 concentration returned by the RBRcoda3 T.ODO,

  • C0 and C1 are corrections and scaling factors for the uncompensated O2 concentration,

  • C2 is a correction factor for pressure,

  • S is the salinity in PSU,

  • P is atmospheric pressure in dbar,

and

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where T is the water temperature (in °C), and

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which correspond to Garcia and Gordon coefficients.