Minor effect of physical size sorting on iron solubility of transported mineral dust

Shi, ZB, Woodhouse, MT, Carslaw, KS, Krom, MD, Mann, GW, Baker, AR, Savov, I, Fones, GR, Brooks, B, Drake, N, Jickells, TD and Benning, LG (2011) Minor effect of physical size sorting on iron solubility of transported mineral dust. Atmospheric Chemistry and Physics, 11 (16). pp. 8459-8469. ISSN 1680-7324

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Abstract

Observations show that the fractional solubility of Fe (FS-Fe, percentage of dissolved to total Fe) in dust aerosol increases considerably from 0.1 % in regions of high dust mass concentration to 80 % in remote regions where concentrations are low. Here, we combined laboratory geochemical measurements with global aerosol model simulations to test the hypothesis that the increase in FS-Fe is due to physical size sorting during transport. We determined the FS-Fe and fractional solubility of Al (FS-Al) in size-fractionated dust generated from two representative soil samples collected from known Saharan dust source regions using a customized dust re-suspension and collection system. The results show that the FS-Fe is size-dependent and ranges from 0.1-0.3 % in the coarse size fractions (>1 µm) to ~0.2-0.8 % in the fine size fractions (

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
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Depositing User: Users 2731 not found.
Date Deposited: 26 Sep 2011 13:37
Last Modified: 21 Apr 2020 16:53
URI: https://ueaeprints.uea.ac.uk/id/eprint/34891
DOI: 10.5194/acp-11-8459-2011

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