Size-resolved mass and chemical properties of dust aerosols from Australia's Lake Eyre Basin

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dc.contributor.authorRadhi, Men_AU
dc.contributor.authorBox, MAen_AU
dc.contributor.authorBox, GPen_AU
dc.contributor.authorMitchell, RMen_AU
dc.contributor.authorCohen, DDen_AU
dc.contributor.authorStelcer, Een_AU
dc.contributor.authorKeywood, MDen_AU
dc.date.accessioned2010-08-23T00:13:28Zen_AU
dc.date.available2010-08-23T00:13:28Zen_AU
dc.date.issued2010-09en_AU
dc.date.statistics2010-09en_AU
dc.description.abstractAustralia is the dominant mineral dust source in the southern hemisphere, yet the physical, chemical and optical properties of Australian dust aerosol are presently poorly understood. We have investigated the properties of Australian aerosol at a site near Lake Eyre in central Australia, which is strongly influenced by mineral dust. During a field campaign in November 2007 we collected eight sets of size-resolved aerosol samples for laboratory analysis: six during quiescent conditions, and two during dust storms. Ion Beam Analysis was used to determine the elemental composition of all filter samples. Scatter plots showed that Fe, Al and Ti were well correlated with Si, and hence soil-derived. The Fe/Si ratio was consistently higher than the global crustal average, confirming that Australian dusts are comparatively rich in Fe. Scatter plots for Na and Cl against Si showed clear evidence of a second aerosol population, associated with maritime advection. Profiles of water soluble ions for two sample sets, showed the importance of marine influences on both the fine and coarse modes, as well as the presence of organic acids. Estimates of the mass fraction of NaCl in our samples suggest that, for quiescent days, roughly 0.5% of the sample mass was NaCl. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationRadhi, M., Box, M. A., Box, G. P., Mitchell, R. M., Cohen, D. D., Stelcer, E., & Keywood. M. D. (2010). Size-resolved mass and chemical properties of dust aerosols from Australia's Lake Eyre Basin. Atmospheric Environment, 44(29), 3519-3528. doi:10.1016/j.atmosenv.2010.06.016en_AU
dc.identifier.govdoc2463en_AU
dc.identifier.issn1352-2310en_AU
dc.identifier.issue29en_AU
dc.identifier.journaltitleAtmospheric Environmenten_AU
dc.identifier.pagination3519-3528en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.atmosenv.2010.06.016en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2282en_AU
dc.identifier.volume44en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAustraliaen_AU
dc.subjectDustsen_AU
dc.subjectChemical propertiesen_AU
dc.subjectAerosolsen_AU
dc.subjectWatershedsen_AU
dc.subjectIon beamsen_AU
dc.titleSize-resolved mass and chemical properties of dust aerosols from Australia's Lake Eyre Basinen_AU
dc.typeJournal Articleen_AU
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