Technical Comments

Comment on "The Southern Ocean Biological Response to Aeolian Iron Deposition"

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Science  11 Jan 2008:
Vol. 319, Issue 5860, pp. 159
DOI: 10.1126/science.1149884

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Cassar et al. (Reports, 24 August 2007, p. 1067) proposed that aerosol-iron input enhances Southern Ocean export production. Their conclusion critically depends upon aerosol-iron modeling simulations not validated with iron-deposition data and dust dissolution rates based on Northern Hemisphere atmospheric chemical conditions (low pH). This diminishes the relevance of their findings and demonstrates that applying such models to this region is premature.

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