Dataset: Dissolved trace metals and macronutrients from samples collected using a tow-fish system on R/V Melville MV1405 (IRN-BRU) cruise in the California Current System in July 2014

Final no updates expectedDOI: 10.26008/1912/bco-dmo.943015.1Version 1 (2024-11-20)Dataset Type:Cruise Results

Principal Investigator: Kenneth W. Bruland (University of California-Santa Cruz)

Scientist: Tyler Coale (University of California-Santa Cruz)

Student: Claire P. Till (University of California-Santa Cruz)

BCO-DMO Data Manager: Audrey Mickle (Woods Hole Oceanographic Institution)


Project: Accomplishment Based Renewal: An iron limitation mosaic within the central California Current System (iron limitation mosaic)


Abstract

This dataset is a suite of dissolved trace metal concentrations, along with macronutrient concentrations collected using a trace-metal clean towed-fish system on R/V Melville cruise MV1405 (IRN-BRU) while investigating the mosaic of the California Current System in July 2014. This dataset includes samples from transects 2, 5, 8, and 9. Transect 2 started at station 2 (an active upwelling site nearshore over the shelf in northern California; see related datasets) and followed the upwelled plume o...

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Nitrate-nitrite, Phosphate, Silicate, Nitrite

Samples were collected from a trace-metal clean towed-fish system (Bruland et al., 2001). Samples were analyzed shortly after collection at sea using standard spectrophotometric methods (Parsons 1984) on a Lachat QuickChem 8000 Flow Injection Analysis System.

Dissolved trace metals

Surface samples for transects were sampled using a tow-fish system (Bruland et al., 2001) plumbed into a trace metal clean van. Samples were filtered directly from the GoFlo through 0.2 μm Acropak Supor membrane capsule filters into pre-cleaned LDPE bottles. The acropaks were pre-cleaned and flushed with at least 250 mL of sample before sampling. Sample bottles were pre-cleaned cleaned rigorously as per the GEOTRACES cookbook (Cutter et al., 2014), and were rinsed with sample three times before filling. Samples were acidified at sea to a pH of ~1.7 with quartz-distilled 6 M HCl (4 mL per liter) and stored for analysis post-cruise. Samples were analyzed for trace metals after the cruise with the method of Biller and Bruland (2012), with modifications as described in Parker et al. (2016). Briefly, this involves buffering the seawater to pH 6.0 ± 0.2 immediately before pre-concentrating on PA1 resin. The resin was extracted with 1 N optima nitric acid with rhodium as an internal standard. Extracts were analyzed on the Thermo Fisher Element 2 extended range ICP-MS at UC Santa Cruz.

Iron was additionally analyzed shipboard with a flow injection analysis method published in Lohan et al. (2006) with modifications as described in Biller et al. (2013). Briefly, this method involves pre-concentrating the iron on a toyopearl column at pH 2, eluting it into a buffered (pH ~5.7) reaction stream that contains DPD, a molecule that turns pink when oxidized by iron. H2O2 is also in the reaction stream, which re-oxidizes the iron, so that each iron molecule can react with multiple DPD molecules, another mechanism to increase the iron signal. The reaction stream absorbance is measured with a flow through spectrophotometer.

Generally, the measurements from these two methods for Fe agreed well; where there was a problem with one or the other dataset, we only report one dataset.


Related Datasets

IsRelatedTo

Dataset: Macronutrients from a 2014 IRNBRU cruise Rosette Data
Coale, T., Bruland, K. W. (2024) Macronutrient concentrations from samples collected using rosette on R/V Melville MV1405 (IRN-BRU) cruise in the California Current System in July 2014. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-11-18 doi:10.26008/1912/bco-dmo.942883.1
IsRelatedTo

Dataset: Dissolved trace metals and macronutrients from a 2014 IRNBRU cruise GoFlo Data
Till, C. P., Coale, T., Bruland, K. W. (2024) Dissolved trace metals and macronutrients from samples collected using GoFlo on R/V Melville MV1405 (IRN-BRU) cruise in the California Current System in July 2014. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-11-05 doi:10.26008/1912/bco-dmo.942928.1

Related Publications

Results

Abdala, Z. M., Clayton, S., Einarsson, S. V., Powell, K., Till, C. P., Coale, T. H., & Chappell, P. D. (2022). Examining ecological succession of diatoms in California Current System cyclonic mesoscale eddies. Limnology and Oceanography, 67(11), 2586–2602. Portico. https://doi.org/10.1002/lno.12224
Results

Boiteau, R. M., Till, C. P., Coale, T. H., Fitzsimmons, J. N., Bruland, K. W., & Repeta, D. J. (2018). Patterns of iron and siderophore distributions across the California Current System. Limnology and Oceanography, 64(1), 376–389. Portico. https://doi.org/10.1002/lno.11046
Results

McNair, H. M., Brzezinski, M. A., Till, C. P., & Krause, J. W. (2017). Taxon‐specific contributions to silica production in natural diatom assemblages. Limnology and Oceanography, 63(3), 1056–1075. Portico. https://doi.org/10.1002/lno.10754
Results

Till, C. P., Solomon, J. R., Cohen, N. R., Lampe, R. H., Marchetti, A., Coale, T. H., & Bruland, K. W. (2018). The iron limitation mosaic in the California Current System: Factors governing Fe availability in the shelf/near‐shelf region. Limnology and Oceanography, 64(1), 109–123. Portico. https://doi.org/10.1002/lno.11022
Methods

Biller, D. V., & Bruland, K. W. (2012). Analysis of Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb in seawater using the Nobias-chelate PA1 resin and magnetic sector inductively coupled plasma mass spectrometry (ICP-MS). Marine Chemistry, 130-131, 12–20. doi:10.1016/j.marchem.2011.12.001