Seawater dissolved chromium concentration, redox speciation, and stable isotope composition in the North Pacific Ocean

• Main Authors: Janssen, David J, Rickli, Jörg, Quay, Paul D, White, Angelicque E, Nasemann, Philipp, Jaccard, Samuel L
• Format: Dataset
• Language: English
• Published: Zenodo 2019
• Subjects: Chromium; Chromium redox; Chromium isotopes; Biological productivity; Paleoproxy; GEOTRACES; Kenney; Pacific; Southern Ocean; Subarctic; Alaska
• Online Access: https://dx.doi.org/10.5281/zenodo.3560082; https://zenodo.org/record/3560082

Dissolved seawater chromium concentrations, redox speciation, and stable isotope composition were measured on samples collected in the North Pacific Ocean. Samples were collected over diel cycles (2 for stations 1-5, 1 for station 6) on board the RV Kilo Moana cruise KM1713 from Seward Alaska to Honolulu Hawai’i. Sampling stations spanned the subarctic North Pacific (stations 1 & 2), the dynamic subarctic-subtropical convergence zone (stations 3 and 4) and the subtropical North Pacific (stations 5 and 6). Chromium was enriched from filtered samples by Mg(OH) 2 co-precipitation and analyzed by MC-ICP-MS using either isotope dilution (Cr redox speciation) or double spike methodology. : Additional Funding Sources: European Research Council (ERC) Consolidator Grant (SCrIPT – grant agreement number 819139) to SLJ US National Science Foundation (NSF) Chemical Oceanography grant #1850588 to AEW Chromium data were obtained on a Neptune MC-ICP-MS acquired with funds from the NCCR PlanetS supported by SNSF grant 51NF40-141881. : {"references": ["Kenney J. & Keeping E. (1951) Mathematics of statistics, second ed., vol. 2. D. Van Nostrand Company, Inc., p. 162 (Chapter 7.11).", "Rickli, J., Janssen, D.J., Hassler, C., Ellwood, M.J., Jaccard, S.L. (2019). Chromium biogeochemistry and stable isotope distribution in the Southern Ocean. Geochim. Cosmochim. Act. 262, 188-206. doi: 10.1016/j.gca.2019.07.033.", "Rudge J.F., Reynolds B.C., Bourdon B. (2009) The double spike toolbox. Chem. Geol. 265, 420-431. doi: 10.1016/j.chemgeo.2009.05.010.", "Schlitzer, R., 2018. Ocean Data View. Available at http://odv.awi.de."]}