10.1594/PANGAEA.989250Zhang, ZhoulingZhoulingZhang0000-0002-8325-7148GEOMAR - Helmholtz Centre for Ocean Research KielXu, AntaoAntaoXu0000-0002-5644-0852GEOMAR - Helmholtz Centre for Ocean Research KielHathorne, Ed CEd CHathorne0000-0002-7813-2455GEOMAR - Helmholtz Centre for Ocean Research KielGutjahr, MarcusMarcusGutjahr0000-0003-2556-2619GEOMAR - Helmholtz Centre for Ocean Research KielFrank, MartinMartinFrank0000-0002-8606-4421GEOMAR - Helmholtz Centre for Ocean Research KielPANGAEA2026Nd concentrationNd isotopic compositionocean circulationSouth Pacific OceanEvent labelDate/Time of eventStation labelLATITUDELONGITUDEDepth, bathymetricDEPTH, waterPressure, waterTemperature, waterSalinityDensity, sigma, in situNeutral densityOxygenNeodymium, dissolvedε-Neodymiumε-Neodymium, standard errorε-Neodymium, standard deviationFish undulating, recording system towCTD/RosetteCTDSO289Sonne_22022-02-23T17:18:00/2022-04-03T21:10:00Dataset10.1016/j.epsl.2026.1198502596 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset contains dissolved neodymium (Nd) concentrations and radiogenic Nd isotope compositions from full water-column seawater profiles collected in the South Pacific Ocean during the GEOTRACES section GP21 (Chile to New Caledonia) aboard R/V SONNE (cruise SO289) between 23 February and 4 April 2022.
Between 10 and 40 L of seawater were collected using 10 L Niskin bottles mounted on a stainless-steel CTD rosette. Beginning at Station 18, an additional 40 L of surface seawater was collected using a trace-metal-clean tow-fish to enable Nd isotope measurements at expected low concentrations.
Samples for Nd isotope analysis were pre-concentrated onboard by coprecipitation with Fe hydroxide and later purified in the home laboratory before analysis by MC-ICP-MS (Thermo Neptune Plus). Nd concentrations were determined from 1 L acidified seawater aliquots spiked with a ¹⁵⁰Nd spike, processed via Fe-hydroxide coprecipitation and AG 50W-X8 cation exchange purification, and measured by isotope-dilution MC-ICP-MS with external reproducibility better than 0.2%.172.0453-71.72897999999998-33.60752-25.7181South Pacific Ocean