Dataset: Surface and profile concentrations of trace metals and radionuclides near Station ALOHA

ValidatedFinal no updates expectedDOI: 10.1575/1912/bco-dmo.792817.1Version 1 (2020-02-11)Dataset Type:Cruise Results

Principal Investigator: Christopher T. Hayes (Massachusetts Institute of Technology)

BCO-DMO Data Manager: Mathew Biddle (Woods Hole Oceanographic Institution)


Project: Center for Microbial Oceanography: Research and Education (C-MORE)


Abstract

Trace element water samples from KM1513 were collected with the MIT Automated Trace Element (ATE) sampler, deployed with a teflon-coated wire from the ship’s deck for surface water samples (collected at roughly 10 m depth), and with the ATEs attached to PVC “Vanes” designed to prevent contamination from the ship’s steel wire for samples collected at greater depth. Samples were filtered at 0.4 μm immediately after collection through polycarbonate track etched filters (Nucleopore) into 250 mL HDPE...

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Trace element water samples from KM1513 were collected with the MIT Automated Trace Element (ATE) sampler, deployed with a teflon-coated wire from the ship’s deck for surface water samples (collected at roughly 10 m depth), and with the ATEs attached to PVC “Vanes” designed to prevent contamination from the ship’s steel wire for samples collected at greater depth. Samples were filtered at 0.4 μm immediately after collection through polycarbonate track etched filters (Nucleopore) into 250 mL HDPE bottles and acidified to 0.012 M hydrochloric acid (ultrapure by quadruple distillation in a Vycor still; ~pH 2) at sea. Sampling and filtration followed published protocols used previously at Station ALOHA, for direct comparison (Fitzsimmons et al., 2015). These casts mostly aligned with Niskin cast station locations, but in some cases did not.


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Results

Hayes, C. T., Fitzsimmons, J. N., Jensen, L. T., Lanning, N. T., Hatta, M., McGee, D., & Boyle, E. A. (2020). A Lagrangian View of Trace Elements and Isotopes in the North Pacific. Journal of Geophysical Research: Oceans, 125(3). doi:10.1029/2019jc015862
Methods

Bell, J., Betts, J., & Boyle, E. (2002). MITESS: a moored in situ trace element serial sampler for deep-sea moorings. Deep Sea Research Part I: Oceanographic Research Papers, 49(11), 2103–2118. doi:10.1016/s0967-0637(02)00126-7
Methods

Fitzsimmons, J. N., Hayes, C. T., Al-Subiai, S. N., Zhang, R., Morton, P. L., Weisend, R. E., … Boyle, E. A. (2015). Daily to decadal variability of size-fractionated iron and iron-binding ligands at the Hawaii Ocean Time-series Station ALOHA. Geochimica et Cosmochimica Acta, 171, 303–324. doi:10.1016/j.gca.2015.08.012