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dc.contributor.authorDeckker, Patricken_US
dc.contributor.authorM. M. Abed, Raeiden_US
dc.contributor.authorBeer, Dirken_US
dc.contributor.authorHinrichs, Kai-Uween_US
dc.contributor.authorO'Loingsigh, Tadhgen_US
dc.contributor.authorSchefuÿ, Ennoen_US
dc.contributor.authorW. Stuut, Jan-Berenden_US
dc.contributor.authorJ. Tapper, Nigelen_US
dc.contributor.authorvan der Kaars, Sanderen_US
dc.date.accessioned2017-04-24T13:36:46Z
dc.date.available2017-04-24T13:36:46Z
dc.date.issued2008en_US
dc.date.modified2011-08-30T06:22:25Z
dc.identifier.issn15252027en_US
dc.identifier.doi10.1029/2008GC002091en_AU
dc.identifier.urihttp://hdl.handle.net/10072/40496
dc.description.abstractDuring the night of 22-23 October 2002, a large amount of airborne dust fell with rain over Canberra, located some 200 km from Australia's east coast, and at an average altitude of 650 m. It is estimated that during that night about 6 g m-2 of aeolian dust fell. We have conducted a vast number of analyses to "fingerprint" some of the dust and used the following techniques: grain size analysis; scanning electron microscope imagery; major, trace, and rare earth elemental, plus Sr and Nd isotopic analyses; organic compound analyses with respective compound-specific isotope analyses; pollen extraction to identify the vegetation sources; and molecular cloning of 16S rRNA genes in order to identify dust bacterial composition. DNA analyses show that most obtained 16S rRNA sequences belong mainly to three groups: Proteobacteria (25%), Bacteriodetes (23%), and gram-positive bacteria (23%). In addition, we investigated the meteorological conditions that led to the dust mobilization and transport using model and satellite data. Grain sizes of the mineral dust show a bimodal distribution typical of proximal dust, rather than what is found over oceans, and the bimodal aspect of size distribution confirms wet deposition by rain droplets. The inorganic geochemistry points to a source along/near the Darling River in NW New South Wales, a region that is characteristically semiarid, and both the organic chemistry and palynoflora of the dust confirm the location of this source area. Meteorological reconstructions of the event again clearly identify the area near Bourke-Cobar as being the source of the dust. This study paves the way for determining the export of Australian airborne dust both in the oceans and other continents.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Geophysical Unionen_US
dc.publisher.placeUnited Statesen_US
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom1en_US
dc.relation.ispartofpageto22en_US
dc.relation.ispartofissue12en_US
dc.relation.ispartofjournalG3: Geochemistry, Geophysics, Geosystemsen_US
dc.relation.ispartofvolume9en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchNatural Hazardsen_US
dc.subject.fieldofresearchPhysical Geography and Environmental Geoscience not elsewhere classifieden_US
dc.subject.fieldofresearchcode040604en_US
dc.subject.fieldofresearchcode040699en_US
dc.titleGeochemical and microbiological fingerprinting of airborne dust that fell in Canberra, Australia, in October 2002en_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.date.issued2008
gro.hasfulltextNo Full Text


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