Iron (Fe) availability limits marine phytoplankton growth in large regions of present-day ocean and is considered to have played a critical role in regulating glacial interglacial changes of atmospheric CO2.   However, the processes controlling the distribution and speciation of dissolved Fe are not well understood.   Here, a �pipe� model is proposed to account for the observed dissolved Fe profiles in the ocean.  New data of dissolved Fe in seawater samples collected during the US GEOTRACES North Atlantic 2010 and 2011 cruises will be presented and problems in the measurements of seawater Fe organic complexation/speciation will be discussed.

What controls dissolved iron distribution in the ocean?

245th National Meeting (2013)

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