Figure 4.

Interpolated cross‐sectional surfaces of vertical ${\mathrm{\delta }}^{18}{\mathrm{O}}_{{\mathrm{H}}_2\mathrm{O}}$ and δ¹³ C_DIC values. ${\mathrm{\delta }}^{18}{\mathrm{O}}_{{\mathrm{H}}_2\mathrm{O}}$ values from south to north in (a) summer and (b) winter, and from west to east in (c) summer and (d) winter. δ¹³ C_DIC values, from south to north in (e) summer and (f) winter, and from west to east in (g) summer and (h) winter. Black dots represent sampling locations and depths