A new method to combine IBA of fine aerosols with Radon-222 to determine source characteristic

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dc.contributor.authorCrawford, Jen_AU
dc.contributor.authorCohen, DDen_AU
dc.contributor.authorZahorowski, Wen_AU
dc.contributor.authorChambers, SDen_AU
dc.contributor.authorStelcer, Een_AU
dc.date.accessioned2011-10-06T03:52:56Zen_AU
dc.date.available2011-10-06T03:52:56Zen_AU
dc.date.issued2011-10-01en_AU
dc.date.statistics2011-10-06en_AU
dc.description.abstractAccelerator based ion beam analysis (IBA) techniques were used to determine the elemental composition of aerosol samples from four sites near Sydney, Australia. Hourly measurements of atmospheric Radon-222 (radon) concentration were made at the same sites. We evaluate a new method for quantifying the degree of distribution of aerosol sources based on the correlation analysis of two consecutive years (2007-2008) of IBA and radon data. Seasonal cycles and trends in concentrations of key elemental constituents of the sampled aerosols are characterised, and explained in terms of the regional Sydney climatology and proximity of measurement sites to the coast. Site-to-site correlation analysis was then undertaken between elements to quantify the extent to which a source had a regional impact or was only local to a site (site-specific). This was followed by correlation analysis of elements and radon at each site to identify the degree of spatial and temporal uniformity of the source at each site. Silicon concentrations (usually associated with soil sources), were overall well correlated between three of the four sites, indicative of a regional source for three sites and a local source for the fourth site. Conversely, the highest sulfur correlations were observed between sites that were closest together. On a site-by-site basis, radon was well correlated with black carbon and potassium and particularly during winter when domestic heating constitutes a distributed source. However, in summer the correlation of radon with BC and K was poor indicating that the distribution of these sources varies over the summer fetch region. Radon was also positively correlated with silicon and titanium, but the correlation coefficient for the entire data set was smaller than for black carbon. In summer and winter, when fetch regions were constrained by the prevailing meteorology, silicon and titanium showed a better correlation with radon. A small negative correlation was seen between sodium (a marker for sea salt) and radon. Crown Copyright (C) 2011 Published by Elsevier B.V.en_AU
dc.identifier.citationCrawford, J., Cohen, D.D., Zahorowski, W., Chambers, S., Stelcer, E. (2011). A new method to combine IBA of fine aerosols with Radon-222 to determine source characteristic. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 269(19), 2041-2051. doi:10.1016/j.nimb.2011.06.007en_AU
dc.identifier.govdoc3682en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.issue19en_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination2041-2051en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.nimb.2011.06.007en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3793en_AU
dc.identifier.volume269en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAerosolsen_AU
dc.subjectRadon 222en_AU
dc.subjectIon beamsen_AU
dc.subjectCorrelationsen_AU
dc.subjectSiliconen_AU
dc.subjectAcceleratorsen_AU
dc.titleA new method to combine IBA of fine aerosols with Radon-222 to determine source characteristicen_AU
dc.typeJournal Articleen_AU
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