The flux of iron from continental shelf sediments: A missing source for global budgets

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Elrod, V. A., Berelson, W. M., Coale, K. H., & Johnson, K. S. (2004). The flux of iron from continental shelf sediments: A missing source for global budgets. Geophysical Research Letters, 31(12), L12307 1-4.
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TitleThe flux of iron from continental shelf sediments: A missing source for global budgets
AuthorsA. Elrod, M. Berelson, H. Coale, S. Johnson
AbstractThe flux of dissolved iron from sediments to the water column was measured with flux chambers along the California coast over a five-year period. High fluxes were observed from sediments on the continental shelf. The measured fluxes were an average of 75 times larger than flux values derived from pore-water iron gradients. The iron flux was significantly correlated with the oxidation of organic matter, which allows an extrapolation to the global shelf. The input from shelf sediments is at least as significant as the global input of dissolved iron from aerosols, which has been presumed to be the dominant external iron source. Evidence of this input is seen 100’s of kilometers offshore where it can enable the high productivity of broad coastal regions seen in satellite images.
JournalGeophysical Research Letters
Date2004
Volume31
Issue12
Start pageL12307 1
End page4

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