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dc.contributor.authorBigot, Marie
dc.contributor.authorMuir, Derek CG
dc.contributor.authorHawker, Darryl W
dc.contributor.authorCropp, Roger
dc.contributor.authorDachs, Jordi
dc.contributor.authorTeixeira, Camilla F
dc.contributor.authorNash, Susan Bengtson
dc.date.accessioned2018-07-16T05:48:55Z
dc.date.available2018-07-16T05:48:55Z
dc.date.issued2016
dc.identifier.issn0013-936X
dc.identifier.doi10.1021/acs.est.6b01970
dc.identifier.urihttp://hdl.handle.net/10072/142860
dc.description.abstractThis study contributes new data on the spatial variability of persistent organic pollutants in the Indian–Pacific sector of the Southern Ocean and represents the first empirical data obtained from this region in 25 years. Paired high-volume atmospheric and seawater samples were collected along a transect between Australia and Antarctica to investigate the latitudinal dependence of the occurrence and distribution of legacy organochlorine pesticides (OCPs) and the current use pesticide chlorpyrifos in the Southern Ocean. Dissolved ΣHCH and dieldrin concentrations decreased linearly with increasing latitude from 7.7 to 3.0 and from 1.0 to 0.6 pg·L–1, respectively. There was no consistent trend observed in the latitudinal profile of atmospheric samples; however, some compounds (such as dieldrin) showed reduced concentrations from 7.5–3.4 to 2.7–0.65 pg·m–3 at the highest latitudes south of the Polar Front. Chlorpyrifos was found in samples from this area for the first time. Estimated air–seawater fugacity ratios and fluxes indicate a current net deposition between −3600 and −900, −6400 and −400, and −1400 and −200 (pg·m–2·d–1) for γ-HCH, dieldrin, and chlorpyrifos, respectively. These findings suggest that, under current climatic conditions, the Southern Ocean reservoir in the Indian–Pacific sector serves as an environmental sink rather than a source of OCPs to the atmosphere.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.relation.ispartofpagefrom8001
dc.relation.ispartofpageto8009
dc.relation.ispartofissue15
dc.relation.ispartofjournalEnvironmental Science and Technology
dc.relation.ispartofvolume50
dc.subject.fieldofresearchOther environmental sciences not elsewhere classified
dc.subject.fieldofresearchcode419999
dc.titleAir-Seawater Exchange of Organochlorine Pesticides in the Southern Ocean between Australia and Antarctica
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.hasfulltextNo Full Text
gro.griffith.authorHawker, Darryl W.
gro.griffith.authorBengtson Nash, Susan M.


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