Mapping Areas of the Southern Ocean Where Productivity Likely Depends on Dust‐Delivered Iron

The existence of low‐productivity areas in the Southern Ocean has been related to limited supply of bioavailable iron from terrestrial sources of dust. Dust‐delivered iron can be crucial to ocean productivity, though alternative mechanisms have also been identified. To explore the geographic distribution of areas limited in the delivery of iron‐rich atmospheric dust in the austral summer, we calculate forward trajectories from continental...