The flux of iron from continental shelf sediments: A missing source for global budgets
The 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 po...
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Published in | Geophysical research letters Vol. 31; no. 12; pp. L12307 - n/a |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
American Geophysical Union
01.06.2004
Blackwell Publishing Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | The 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. |
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Bibliography: | istex:52D1BA1E8E9E4B0EB03EAD791E4C345BB20A0329 ArticleID:2004GL020216 ark:/67375/WNG-R4QMGVT9-X ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0094-8276 1944-8007 |
DOI: | 10.1029/2004GL020216 |