Trace element concentration, iron isotope ratios, and iron species of size-fractionated aerosols and seawater across the subarctic North Pacific during Japan GEOTRACES cruise GP02 in 2017 summer
Description
This dataset contains Fe stable isotope ratios and trace element concentrations of aerosols and seawater collected during Japan GEOTRACES cruise GP02 in 2017 in the subarctic North Pacific in order to clarify the Fe source of aerosols and surface seawater using Fe isotope ratios. The bulk and six size-fractionated aerosols dataset consist of trace element concentrations, some major ion concentrations, enrichment factor, fractional Fe solubility, Fe species, and Fe stable isotope ratios. Seawater data consist of hydrological parameters (temperature, salinity, chlorophyll-a concentration, nitrate+nitrite concentration), dissolved Fe concentration, and dissolved Fe isotope ratios. Aerosol trace element concentrations were measured using ICP-MS (NexION350s, Perkin Elmer) after mixed acid digestion. Fe species were determined by Fe K-edge X-ray absorption near-edge structure (XANES) analysis. Fe isotope ratios were determined by isotope dilution MC-ICP-MS (Neptune plus, Thermo Fisher Scientific) after trace element preconcentration and Fe separation with an anion exchange resin. The dataset contains several data tabs: bulk aerosols, size-fractionated aerosols, size-fractionated aerosol XANES data, seawater data, and other data shown in tables and figures, including accuracy of the double spike analysis, XANES spectra, reference material data, aerosol filter blank, seawater Fe isotope data, and correlation coefficients. The main tabs contain the following information: (1) Bulk aerosols: The data on total suspended aerosol particles (not size-fractionated), including trace element concentrations, sodium and sulfate concentrations, enrichment factors, water-soluble Fe concentrations, Fe stable isotope ratios, contribution of combustion Fe, . (2) Size-fractionated aerosols: The data of six size-fractionated aerosol particles, including trace element concentrations, water-soluble Al and Fe concentrations, enrichment factors, and Fe stable isotope ratios. (3) Aerosol Fe species: The data of six-size fractionated aerosol particles. The relative abundance of different Fe species is shown. (4) Seawater data: The data include salinity, temperature, chlorophyll a, nitrate+nitrite, dissolved Fe concentration, and Fe stable isotope ratios of dissolved Fe.