Fig 3. Spatial gradients in seawater carbonate chemistry and oxygen in the early morning and late afternoon.

Boxplots of temperature (°C), dissolved oxygen (DO; μmol kg^-1), total scale pH (pH_T), dissolved inorganic carbon (DIC; μmol kg^-1); and total alkalinity (TA; μmol kg^-1) by spatial survey location (nearshore, mid, outer, and outside; n = 3 each) for the early morning and late afternoon surveys (left and right column, respectively). Significant differences between pairs of locations (ANOVA and Tukey post-hoc test) are denoted by brackets with listed p-values.