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Volcanic and atmospheric controls on ash iron solubility: A review
Ayris, P.; Delmelle, P. (2012). Volcanic and atmospheric controls on ash iron solubility: A review. Phys. Chem. Earth, A 45-46: 103-112.
In: Physics and Chemistry of the Earth. A. Solid Earth and Geodesy. Pergamon: Oxford. ISSN 1464-1895, meer
Peer reviewed article  

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Author keywords
    Volcanic ash; Iron release; Iron solubility; Ocean

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  • Ayris, P.
  • Delmelle, P.

    The ash material produced by volcanic eruptions carries important information about the underground magma eruptive conditions and subsequent modifications in the volcanic plume and during atmospheric transport. Volcanic ash is also studied because of its impacts on the environment and human health. In particular, there is a growing interest from a multidisciplinary scientific community to understand the role that ash deposition over open ocean regions may play as a source of bioavailable Fe for phytoplankton production. Similar to aeolian mineral dust, the processes that affect the mineralogy and speciation of Fe in ash may promote solubilisation of Fe in ash, and thus may increase the amount of volcanic Fe supplied to ocean surface waters. Our knowledge of these controls is still very limited, a situation which has hindered quantitative interpretation of experimental Fe release measurements. In this review, we identify the key volcanic and atmospheric controls that are likely to modulate ash Fe solubility. We also briefly discuss existing data on Fe release from ash and make some recommendations for future studies in this area.

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