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 ORCID: https://orcid.org/0000-0002-8365-8953, Savov, I, Fones, G, Brooks, B, Jickells, TD and Benning, LG (2011) Minor effect of physical size sorting on iron solubility of transported mineral dust. Atmospheric Chemistry and Physics Discussions, 11 (5). pp. 14309-14338. ISSN 1680-7375

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Observations show that the fractional solubility of Fe (FS-Fe, ratio of dissolved to total Fe) in dust aerosol increases dramatically 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
Depositing User: Rosie Cullington
Date Deposited: 06 Jun 2011 13:48
Last Modified: 15 Dec 2022 01:26
URI: https://ueaeprints.uea.ac.uk/id/eprint/31847
DOI: 10.5194/acpd-11-14309-2011

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