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Surface (<20 m) O2 concentrations, determined in the WOCE
hydrographic program, are plotted versus the oxygen solubility at the
temperature and salinity of each sample. Surface oxygen samples are
somewhat supersaturated (concentrations lie above the 1:1 line representing
saturation) due to oxygen production by photosynthesis. The cluster of
data points falling below the saturation line at an oxygen solubility near 365
µmol/kg are from the month of November in the Southern Ocean. They are
likely undersaturated due to mixing of deep, low oxygen water, to the surface.
The inset shows sample locations. The graph was prepared using Ocean Data
View with the Electronic WOCE Atlas.
