Published December 2, 2019 | Version 1.0 (03-Dec-2019)
Dataset Open

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

Creators

  • 1. University of Bern, Institute of Geological Sciences & Oeschger Center for Climate Change Research, Baltzerstrasse 1-3, 3012, Bern Switzerland
  • 2. University of Bern, Institute of Geological Sciences & Oeschger Center for Climate Change Research, Baltzerstrasse 1-3, 3012, Bern Switzerland; Institute of Geochemistry and Petrology, ETH Zürich, Clausiusstrasse 25, 8092, Zürich Switzerland
  • 3. University of Washington, School of Oceanography, 1503 NE Boat Street, Seattle, WA 98195, USA
  • 4. University of Hawai'i at Manoa, School of Ocean & Earth Science and Technology, 1950 East West Road Honolulu, HI 96822, USA

Description

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.

Notes

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.

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Additional details

Funding

SeaO2 - Past changes in Southern Ocean overturning circulation - implications for the partitioning of carbon and oxygen between the ocean and the atmosphere PP00P2_172915
Swiss National Science Foundation

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.