Chemical characterisation and source identification of atmospheric aerosols in the Snowy Mountains, south-eastern Australia

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dc.contributor.authorTadros, CVen_AU
dc.contributor.authorCrawford, Jen_AU
dc.contributor.authorTreble, PCen_AU
dc.contributor.authorBaker, AAen_AU
dc.contributor.authorCohen, DDen_AU
dc.contributor.authorAtanacio, AJen_AU
dc.contributor.authorHankin, SIen_AU
dc.contributor.authorRoach, Ren_AU
dc.date.accessioned2020-09-02T23:47:42Zen_AU
dc.date.available2020-09-02T23:47:42Zen_AU
dc.date.issued2018-07-15en_AU
dc.date.statistics2020-08-14en_AU
dc.description.abstractCharacterisation of atmospheric aerosols is of major importance for: climate, the hydrological cycle, human health and policymaking, biogeochemical and palaeo-climatological studies. In this study, the chemical composition and source apportionment of PM2.5 (particulate matter with aerodynamic diameters less than 2.5 μm) at Yarrangobilly, in the Snowy Mountains, SE Australia are examined and quantified. A new aerosol monitoring network was deployed in June 2013 and aerosol samples collected during the period July 2013 to July 2017 were analysed for 22 trace elements and black carbon by ion beam analysis techniques. Positive matrix factorisation and back trajectory analysis and trajectory clustering methods were employed for source apportionment and to isolate source areas and air mass travel pathways, respectively. This study identified the mean atmospheric PM2.5 mass concentration for the study period was (3.3 ± 2.5) μg m−3. It is shown that automobile (44.9 ± 0.8)%, secondary sulfate (21.4 ± 0.9)%, smoke (12.3 ± 0.6)%, soil (11.3 ± 0.5)% and aged sea salt (10.1 ± 0.4)% were the five PM2.5 source types, each with its own distinctive trends. The automobile and smoke sources were ascribed to a significant local influence from the road network and bushfire and hazard reduction burns, respectively. Long-range transport are the dominant sources for secondary sulfate from coal-fired power stations, windblown soil from the inland saline regions of the Lake Eyre and Murray-Darling Basins, and aged sea salt from the Southern Ocean to the remote alpine study site. The impact of recent climate change was recognised, as elevated smoke and windblown soil events correlated with drought and El Niño periods. Finally, the overall implications including potential aerosol derived proxies for interpreting palaeo-archives are discussed. To our knowledge, this is the first long-term detailed temporal and spatial characterisation of PM2.5 aerosols for the region and provides a crucial dataset for a range of multidisciplinary research. Crown Copyright © 2018 Published by Elsevier B.V.en_AU
dc.identifier.citationTadros, C. V., Crawford, J., Treble, P. C., Baker, A., Cohen, D. D., Atanacio, A. J., Hankin, S. & Roach, R. (2018). Chemical characterisation and source identification of atmospheric aerosols in the Snowy Mountains, south-eastern Australia. Science of the Total Environment, 630, 432-443. doi:org/10.1016/j.scitotenv.2018.02.231en_AU
dc.identifier.govdoc9883en_AU
dc.identifier.issn0048-9697en_AU
dc.identifier.journaltitleScience of the Total Environmenten_AU
dc.identifier.pagination432-443en_AU
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2018.02.231en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9765en_AU
dc.identifier.volume630en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectSouthern Oscillationen_AU
dc.subjectTrace amountsen_AU
dc.subjectAerosolsen_AU
dc.subjectAtmospheric chemistryen_AU
dc.subjectCarbonen_AU
dc.subjectClimatic changeen_AU
dc.subjectFactorizationen_AU
dc.subjectIon beamsen_AU
dc.subjectLandformsen_AU
dc.subjectNickelen_AU
dc.subjectParticulatesen_AU
dc.subjectSoilsen_AU
dc.subjectSulfur compoundsen_AU
dc.titleChemical characterisation and source identification of atmospheric aerosols in the Snowy Mountains, south-eastern Australiaen_AU
dc.typeJournal Articleen_AU
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