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Developing Standards for Dissolved Iron in Seawater


Johnson, KS and Boyle, E and Bruland, K and Coale, K and Measures, C and Moffett, J and Aguilar-Islas, A and Barbeau, K and Bergquist, B and Bowie, AR and Buck, K and Cai, Y and Chase, Z and Cullen, J and Doi, T and Elrod, V and Fitzwater, S and Gordon, M and King, A and Laan, P and Laglera-Baquer, L and Landing, W and Lohan, M and Mendez, J and Milne, A and Obata, H and Ossiander, L and Plant, J and Sarthou, G and Sedwick, P and Smith, GJ and Sohst, B and Tanner, S and Van Den Berg, S and Wu, J, Developing Standards for Dissolved Iron in Seawater, Eos: Transactions, American Geophysical Union, 88, (11, 13 March) pp. 131-132. ISSN 0096-3941 (2007) [Professional, Refereed Article]

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In nearly a dozen open- ocean fertilization experiments conducted by more than 100 researchers from nearly 20 countries, adding iron at the sea surface has led to distinct increases in photosynthesis rates and biomass. These experiments confirmed the hypothesis proposed by the late John Martin [Martin, 1990] that dissolved iron concentration is a key variable that controls phytoplankton processes in ocean surface waters. However, the measurement of dissolved iron concentration in seawater remains a difficult task [Bruland and Rue, 2001] with significant interlaboratory differences apparent at times. The availability of a seawater reference solution with well- known dissolved iron (Fe) concentrations similar to open- ocean values, which could be used for the calibration of equipment or other tasks, would greatly alleviate these problems [National Research Council (NRC), 2002]. The Sampling and Analysis of Fe (SAFe) cruise was staged from Honolulu, Hawaii, to San Diego, Calif., between 15 October and 8 November 2004 to collect data and samples that were later used to provide this reference material. Here we provide a brief report on the cruise results, which have produced a tenfold improvement in the variability of iron measurements, and announce the availability of the SAFe dissolved Fe in seawater standards.

Item Details

Item Type:Professional, Refereed Article
Keywords:iron ocean analysis
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Chemical oceanography
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Bowie, AR (Professor Andrew Bowie)
UTAS Author:Chase, Z (Professor Zanna Chase)
ID Code:79532
Year Published:2007
Deposited By:IMAS Research and Education Centre
Deposited On:2012-09-18
Last Modified:2012-10-22
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