EDIC in surface waters from June 2014 through May 2015. This time series of EDIC in surface water samples from the six stations (color-coded, with locations shown in Figure 1) shows positive values during October–February when pCO₂ > 400 µatm, and negative values during March–September when pCO₂ < 400 µatm. Positive values of EDIC indicate an increase in ambient DIC relative to equilibrium with atmospheric pCO₂ (outgassing) due to respiration. Negative values of EDIC indicate reduction of ambient DIC due to primary production and uptake of CO₂. Values of EDIC range from a low of –206 µmol kg^–1 to a high of 156 µmol kg^–1. DOI: https://doi.org/10.1525/elementa.270.f6