California Current Ecosystem LTER

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Dissolved Iron (Process Cruise)

Title
Measurements, from CCE LTER process cruises in the California Current region, of dissolved inorganic concentrations of nutrient iron and of iron limitation at selected stations and depths, 2006 - 2021 (ongoing).

Abstract
Measurements are made of dissolved iron, total iron and the potential for phytoplankton iron limitation on CCE LTER Process cruises (since 2006, ongoing) in coastal transition zones of the southern California Current System. This is a weak upwelling regime that is relatively low in nutrients and chlorophyll. Changes in phytoplankton (Chla response to Fe+) and nutrient parameters upon iron addition are also investigated.
Keywords
habitats, marine, inorganic nutrients, iron, biogeochemistry, Inorganic Matter, RAPID: Responses of the California Current Ecosystem to El Nino 2015-16

LTER Data System Record
http://dx.doi.org/10.6073/pasta/04d96454a7b5fce043ab9ee197b7d052
Projects
California Current Ecosystem LTER

Creators
Barbeau, Katherine (kbarbeau@ucsd.edu)

Contact
CCE LTER Information Manager (ccelter.im@gmail.com)

Data

table DissolvedIron
Main data table for dataset 		Rows: 967
Columns: 13 		View / Download

Methods

Analysis Methods
Samples were analyzed at the Scripps Institution of Oceanography, dissolved Fe samples were measured using a flow injection analysis system (Waterville Analytical) with an Fe(II) sulfite reduction. Details on the method are provided in "Dissolved iron and macronutrient distributions in the southern California Current System" (King and Barbeau JGR 2011)

Sampling Methos
Samples were collected with teflon coated Niskin bottles mounted on a trace metal clean CTD-Rosette lowered into the water by a coated hydrowire to pre-determined depths. Iron samples were filtered through an AcroPak filter, by pressurizing the Niskin bottle with filtered air, into acid washed bottles and acidified to a pH < 2. Samples were stored in boxes at room temperature until subsequent analysis in the lab.

References

Hopkinson, B. M., and Barbeau, K., Influence of iron on phytoplankton in subsurface chlorophyll maximum communities of the eastern Pacific. Limnology and Oceanography, 53 (4), 1303-1318, 2008. CCE LTER Contribution #0047.

King, A. L., Buck, K. N., and Barbeau, K. A., Quasi-Lagrangian drifter studies of iron speciation and cycling off Point Conception, California. Marine Chemistry, 128-129, 1-12, 2012. DOI 10.1016/j.marchem.2011.11.001. CCE LTER Contribution #0197.

Landry, M. R., Ohman, M. D., Goericke, R., Stukel, M. R., Barbeau, K. A., Bundy, R.M., and Kahru, M., Pelagic community responses to a deep-water front in the California Current Ecosystem: overview of the A-Front Study. Journal of Plankton Research, 34 (9), 739-748, 2012. DOI 10.1093/plankt/fbs025. CCE LTER Contribution #0207.

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