Assessing the impact of atmospheric stability on locally and remotely sourced aerosols at Richmond, Australia, using Radon-222

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dc.contributor.authorCrawford, Jen_AU
dc.contributor.authorChambers, SDen_AU
dc.contributor.authorCohen, DDen_AU
dc.contributor.authorWilliams, AGen_AU
dc.contributor.authorGriffiths, ADen_AU
dc.contributor.authorStelcer, Een_AU
dc.date.accessioned2016-01-27T03:58:55Zen_AU
dc.date.available2016-01-27T03:58:55Zen_AU
dc.date.issued2015-12-13en_AU
dc.description.abstractA flexible radon-based scheme for the classification of nocturnal stability regimes was used for the interpretation of daily-integrated PM2.5 aerosol observations collected at Richmond, Australia, between 2007 and 2011. Source fingerprint concentrations for the dominant locally and remotely sourced aerosols were analysed by nocturnal radon stability category to characterise the influences of day-to-day changes in daily integrated atmospheric mixing. The fingerprints analysed included: smoke, vehicle exhaust, secondary sulfate and aged industrial sulfur. The largest and most consistent stability influences were observed on the locally sourced pollutants. Based on a 5-year composite, daily integrated concentrations of smoke were almost a factor of 7 higher when nocturnal conditions were classed as “stable” than when they were “near neutral”. For vehicle emissions a factor of 4 was seen. However, when the winter months were considered in isolation, it was found that these factors increased to 11.5 (smoke) and 5.5 (vehicle emissions) for daily average concentrations. The changes in concentration of the remotely sourced pollutants with atmospheric stability were comparatively small and less consistent, probably as a result of the nocturnal inversion frequently isolating near-surface observations from non-local sources at night. A similar classification was performed using the commonly-adopted Pasquill–Gifford (PG) stability typing technique based on meteorological parameters. While concentrations of fingerprints associated with locally-sourced pollutants were also shown to be positively correlated with atmospheric stability using the PG classification, this technique was found to underestimate peak pollutant concentrations under stable atmospheric conditions by almost a factor of 2. © 2015, Elsevier Ltd.en_AU
dc.identifier.citationCrawford, J., Chamber, S., Cohen, D., Williams, A., Griffiths, A., & Stelcer. E. (2016). Assessing the impact of atmospheric stability on locally and remotely sourced aerosols at Richmond, Australia, using Radon-222. Atmospheric Environment, 127, 107-117. doi:10.1016/j.atmosenv.2015.12.034en_AU
dc.identifier.govdoc6403en_AU
dc.identifier.issn1352-2310en_AU
dc.identifier.journaltitleAtmospheric Environmenten_AU
dc.identifier.pagination107-117en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.atmosenv.2015.12.034en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6537en_AU
dc.identifier.volume127en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAtmosphericsen_AU
dc.subjectAerosolsen_AU
dc.subjectAustraliaen_AU
dc.subjectRadon 222en_AU
dc.subjectPollutantsen_AU
dc.subjectSulfatesen_AU
dc.titleAssessing the impact of atmospheric stability on locally and remotely sourced aerosols at Richmond, Australia, using Radon-222en_AU
dc.typeJournal Articleen_AU
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