A record of carbonyl sulfide from Antarctic ice over the last 1000 years

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dc.contributor.authorAllin, SJen_AU
dc.contributor.authorSturges, WTen_AU
dc.contributor.authorLaube, JCen_AU
dc.contributor.authorEtheridge, DMen_AU
dc.contributor.authorRubino, Men_AU
dc.contributor.authorTrudinger, CMen_AU
dc.contributor.authorCurran, MAJen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorMulvaney, Ren_AU
dc.date.accessioned2015-11-11T00:38:33Zen_AU
dc.date.available2015-11-11T00:38:33Zen_AU
dc.date.issued2013-01-01en_AU
dc.description.abstractCarbonyl sulfide (COS) is a trace gas, present in the troposphere, and also in the stratosphere, where it contributes to the stratospheric sulfate aerosol layer. It has both natural and anthropogenic sources. Natural processes include uptake by plants, while oceans, wetlands, volcanism and biomass burning all contribute to natural COS emissions. We have measured COS in Antarctic ice cores from Dronning Maud Land, drilled in 1998, the DE08 core drilled at Law Dome in 1987, and the DSS0506 core drilled in 2006. Ice samples with COS gas ages between about 1050 AD and the early 20th centrury have been examined. A large volume ice crusher at the CSIRO Marine and Atmospheric Research laboratory was used to extract air from bubbles occluded in the ice cores. These air samples were analysed for CO2, CH4, CO and 13CO2 at CSIRO, and then for COS and several halocarbons at the University of East Anglia on a high sensitivity gas chromatograph/tri-sector mass spectrometer system. Initial results indicate that good sample integrity can be achieved. Measurements from the DML samples indicate low and uniform abundances across the last few hundred years, and at concentrations significantly below those in the modernday atmosphere. Measurements in more recent ice from DE08 show the start of increasing concentrations in the early 1900s, confirming earlier evidence that the global atmospheric abundance of COS has increased as a result of industrial activity during the 20th century.en_AU
dc.identifier.citationAllin, S. J., Sturges, W. T., Laube, J., Etheridge, D., Rubino, M., Trudinger, C., Smith, A., & Mulvaney, R. (2013). A Record of carbonyl sulfide from Antarctic Ice over the Last 1000 Years. Paper presented at the Goldschmidt 2013 Conference, Florence, Italy, 25-30 August 2013. (pp.579). doi:10.1180/minmag.2013.077.5.1. 579en_AU
dc.identifier.conferenceenddate30 August 2014en_AU
dc.identifier.conferencenameGoldschmidt 2013 Conferenceen_AU
dc.identifier.conferenceplaceFlorence, Italyen_AU
dc.identifier.conferencestartdate25 August 2013en_AU
dc.identifier.govdoc6259en_AU
dc.identifier.pagination579en_AU
dc.identifier.urihttps://goldschmidt.info/2013/abstracts/abstractView?id=2013004524en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6408en_AU
dc.language.isoenen_AU
dc.publisherGeochemical Societyen_AU
dc.subjectCarbon oxysulfideen_AU
dc.subjectGasesen_AU
dc.subjectTroposphereen_AU
dc.subjectStratosphereen_AU
dc.subjectAerosolsen_AU
dc.subjectPlantsen_AU
dc.subjectAntarcticaen_AU
dc.titleA record of carbonyl sulfide from Antarctic ice over the last 1000 yearsen_AU
dc.typeConference Abstracten_AU
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