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

ZB Shi; MT Woodhouse; KS Carslaw; MD Krom; GW Mann; AR Baker; I Savov; G Fones; B Brooks; TD Jickells; LG Benning

doi:10.5194/acpd-11-14309-2011

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

ZB Shi, MT Woodhouse, KS Carslaw, MD Krom, GW Mann, AR Baker, I Savov, G Fones, B Brooks, TD Jickells, LG Benning

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

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 (

Original language	English
Pages (from-to)	14309-14338
Number of pages	30
Journal	Atmospheric Chemistry and Physics Discussions
Volume	11
Issue number	5
DOIs	https://doi.org/10.5194/acpd-11-14309-2011
Publication status	Published - 2011

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Cite this

@article{4c1b6906674242da8b52d5b43686ea47,

title = "Minor effect of physical size sorting on iron solubility of transported mineral dust",

abstract = "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 (",

author = "ZB Shi and MT Woodhouse and KS Carslaw and MD Krom and GW Mann and AR Baker and I Savov and G Fones and B Brooks and TD Jickells and LG Benning",

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language = "English",

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journal = "Atmospheric Chemistry and Physics Discussions",

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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, G; Brooks, B; Jickells, TD; Benning, LG.

In: Atmospheric Chemistry and Physics Discussions, Vol. 11, No. 5, 2011, p. 14309-14338.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Minor effect of physical size sorting on iron solubility of transported mineral dust

AU - Shi, ZB

AU - Woodhouse, MT

AU - Carslaw, KS

AU - Krom, MD

AU - Mann, GW

AU - Baker, AR

AU - Savov, I

AU - Fones, G

AU - Brooks, B

AU - Jickells, TD

AU - Benning, LG

PY - 2011

Y1 - 2011

N2 - 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 (

AB - 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 (

U2 - 10.5194/acpd-11-14309-2011

DO - 10.5194/acpd-11-14309-2011

M3 - Article

VL - 11

SP - 14309

EP - 14338

JO - Atmospheric Chemistry and Physics Discussions

JF - Atmospheric Chemistry and Physics Discussions

SN - 1680-7375

IS - 5

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