The average dissolved oxygen concentration has been calculated for the region between Dabob Bay and the Great Bend and for water depths between 20 m and the sea floor. The dissolved oxygen measurements which were used to determine the average value are from all hydrographic studies with at least 5 stations in this region which were occupied over a one- or two-day period.

Since the horizontal and vertical sampling of dissolved oxygen measurements varies between cruises, a
mathematical technique was used to fit the measurements to a regularly-spaced grid (in depth and distance) for each study. This grid was then used to calculate the average concentration which is plotted above.