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dc.contributor.authorCarlos, Franciéle Schwanckpt_BR
dc.contributor.authorSimões, Jefferson Cardiapt_BR
dc.contributor.authorHandley, Michael J.pt_BR
dc.contributor.authorMayewski, Paulpt_BR
dc.contributor.authorBernardo, Ronaldopt_BR
dc.date.accessioned2022-08-16T04:46:14Zpt_BR
dc.date.issued2022pt_BR
dc.identifier.issn0001-3765pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/246912pt_BR
dc.description.abstractTrace elements are emitted to the atmosphere from natural and anthropogenic sources. The increase in industrialization and mining occurring from the late 19th century released large quantities of toxic trace elements into the Earth’s atmosphere. Here we investigate the variability of concentrations of bismuth, cadmium, chromium, and lead in two Mount Johns – MJ (79°55’28”S, 94°23’18”W, 2100 m a.s.l) ice cores over 132 years (1883-2015). Trace element concentrations were determined using inductively coupled plasma mass spectrometry (CCI/UMaine). The data show evidence of pollution for these elements in Antarctica as early as the 1883. Several maxima concentrations were observed: first at the beginning of the 20th century and the last from 1970s to 1990s, with a clear decrease during recent years. Emissions occur from different anthropogenic sources and appear to be variable throughout the record. The main source of these elements is attributed to mining and smelting of non-ferrous metals in South America, Africa, and Australia. As well as a probable lead enrichment due to the use of fossil fuels. The MJ ice core record also reflects changes in atmospheric circulation and transport processes, probably associated with a strengthening of the westerlies.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAnais da Academia Brasileira de Ciências. Rio de Janeiro. Vol. 94, supl. 1 (2022), e20210351, 16 p.pt_BR
dc.rightsOpen Accessen
dc.subjectAnthropogenic emissionsen
dc.subjectElementos-traçopt_BR
dc.subjectIce coreen
dc.subjectTestemunhos de gelopt_BR
dc.subjectAntárticapt_BR
dc.subjectTransporten
dc.titleAnthropogenic trace elements (Bi, Cd, Cr, Pb) concentrations in a West Antarctic ice corept_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001144444pt_BR
dc.type.originNacionalpt_BR


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