Articles | Volume 13, issue 13
https://doi.org/10.5194/bg-13-3887-2016
https://doi.org/10.5194/bg-13-3887-2016
Research article
 | 
06 Jul 2016
Research article |  | 06 Jul 2016

Potentially bioavailable iron delivery by iceberg-hosted sediments and atmospheric dust to the polar oceans

Robert Raiswell, Jon R. Hawkings, Liane G. Benning, Alex R. Baker, Ros Death, Samuel Albani, Natalie Mahowald, Michael D. Krom, Simon W. Poulton, Jemma Wadham, and Martyn Tranter

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Cited articles

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Berger, C. J. M., Lippiat, S. M., Lawrence, M. G., and Bruland, K. W.: Application of a chemical leach technique for estimating labile particulate aluminium, iron and manganese in the Columbia River plume and coastal waters off Oregon and Washington, J. Geophys. Res., 113, C00B01, https://doi.org/10.1029/2007JC004703, 2008.
Boyd, P. W., Mackie, D. S., and Hunter, K. A.: Aerosol iron deposition to the surface ocean-Modes of iron supply and biological responses, Mar. Chem., 120, 128–143, 2010.
Boyd, P. W., Arrigo, K. R., R., Stzepekand, R., and van Dijken, G. L.: Mapping phytoplankton iron utilization: insights into Southern Ocean supply mechanisms, J. Geophys. Res., 117, C06009, https://doi.org/10.1029/2011JC007726, 2012.
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Short summary
Iron is an essential nutrient for plankton growth. One important source of iron is wind-blown dust. The polar oceans are remote from dust sources but melting icebergs supply sediment that contains iron which is potentially available to plankton. We show that iceberg sediments contain more potentially bioavailable iron than wind-blown dust. Iceberg sources will become increasingly important with climate change and increased plankton growth can remove more carbon dioxide from the atmosphere.
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