Figure 3.

Standard deviation of the decadal (left) and interannual (right) variability of CO₂ and O₂ air–sea fluxes. For CO₂ (a,b and d,e), the averaged maps from GOBMs and from pCO₂ products are shown, while for O₂ (c and f) only GOBMs could be used to study the spatial patterns. Note the differences in units and colour scales between O₂ and CO₂ maps. The black lines represent the average location of the Subantarctic Front (northern line) and of the September extent of sea ice (southern line). Maps from individual GOBM and pCO₂ product are available in the electronic supplementary material (figures S1–S6). (Online version in colour.)