Dissolved trace metal concentrations, nickel speciation, and pH in shipboard incubations conducted on FeOA project cruise SKQ202209S on the R/V Sikuliaq between June 4 2022 to July 1 2022 in the NE Pacific.

This dataset includes the concentrations of total dissolved trace metals (manganese, iron, added iron-57, nickel, copper, zinc), of labile dissolved nickel, and pH measured in samples collected from phytoplankton shipboard incubation experiments conducted on the FeOA cruise SKQ202209S on R/V Sikuliaq in the NE Pacific from June to July 2022.
This project investigates the effects of ocean acidification on the associations between iron and organic ligands in seawater and on iron bioavailability to marine phytoplankton communities. The project used a combination of shipboard incubation experiments and depth profiles to characterize iron speciation and cycling across coastal upwelling, oligotrophic open ocean, and iron-limited subarctic oceanographic regimes in the NE Pacific. Surface seawater was incubated at pH of 8.1, 7.6, and 7.1 with natural iron and with dissolved iron amendments in order to investigate interactions between pH and iron bioavailability across the different regimes. Understanding how pH influences iron and its relationship with ligands provides important information for assessing the impacts of ocean acidification on primary production and biogeochemical processes.