Dissolved iron distributions in the central region of the Gulf of California, México

We report dissolved iron (Fe d) concentrations measured in the upper 600 m in the central region of the Gulf of California (GC) under spring conditions. Our results showed the complex nature of Fe cycling within the GC. In the northern region of the study area, surface waters were relatively enriched, with Fe d concentrations >5.0 nM, which can be partially explained by an atmospheric source. These concentrations are 12 times higher than those found in the adjacent Pacific Ocean. In contrast, Fe d depth profiles in the southern region did not show any Fe d surface enrichment (concentrations