Measurements of the 14CO2 bomb pulse in firn and ice at Law Dome, Antarctica

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dc.contributor.authorLevchenko, VAen_AU
dc.contributor.authorEtheridge, DMen_AU
dc.contributor.authorFrancey, RJen_AU
dc.contributor.authorTrudinger, CMen_AU
dc.contributor.authorTuniz, Cen_AU
dc.contributor.authorLawson, EMen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorHotchkis, MACen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorMorgan, VIen_AU
dc.contributor.authorHead, Jen_AU
dc.date.accessioned2021-06-30T23:32:04Zen_AU
dc.date.available2021-06-30T23:32:04Zen_AU
dc.date.issued1997-03-02en_AU
dc.date.statistics2021-06-30en_AU
dc.description.abstract14CO2 produced in the atmosphere by nuclear weapons testing in the 1960's is now incorporated in the air bubbles of Antarctic ice. The high atmospheric radiocarbon growth rates through the period of tests and subsequent decline provide a unique and independent test for the smoothing of atmospheric CO2 signals due to firn diffusion and bubble close off. The level of smoothing quantifies the time resolution with which atmospheric trace gas histories can be reconstructed from ice cores. In this paper, the methodologies for the preparation and AMS measurements of ice core and firn 14CO2 from high accumulation sites at Law Dome are detailed. The results are compared with predictions of a numerical model incorporating firn air diffusion and bubble close-off. The sample sizes, precision of measurements and sources of contamination are discussed for both firn and ice samples. © 1997 Elsevier Science B.V.en_AU
dc.identifier.citationLevchenko, V. A., Etheridge, D. M., Francey, R. J., Trudinger, C., Tuniz, C., Lawson, E. M., Smith, A. M., Jacobsen, G. E., Hua, Q., Hotchkis, M. A. C., Fink, D., Morgan, V. I. & Head, J. (1997). Measurements of the 14CO2 bomb pulse in firn and ice at Law Dome, Antarctica. Paper presented to Accelerator Mass Spectrometry, 20-24 May 1996, Tucson, Arizona, USA. In A. J. T. Jull, J. W. Beck, & G. S. Burr (Eds). Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 123(1-4), 290-295. doi:10.1016/S0168-583X(96)00735-5en_AU
dc.identifier.conferenceenddate24 May 1996en_AU
dc.identifier.conferencenameAccelerator Mass Spectrometryen_AU
dc.identifier.conferenceplaceTucson, Arizonaen_AU
dc.identifier.conferencestartdate20 May 1996en_AU
dc.identifier.editorsA. J. T. Jull, J. W. Beck, & G. S. Burren_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.issue1-4en_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination290-295en_AU
dc.identifier.urihttps://doi.org/10.1016/S0168-583X(96)00735-5en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11013en_AU
dc.identifier.volume123en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAntarcticaen_AU
dc.subjectAntarctic regionsen_AU
dc.subjectIceen_AU
dc.subjectCarbon 14en_AU
dc.subjectCarbon dioxideen_AU
dc.subjectTrace amountsen_AU
dc.subjectDrill coresen_AU
dc.subjectNuclear explosionsen_AU
dc.titleMeasurements of the 14CO2 bomb pulse in firn and ice at Law Dome, Antarcticaen_AU
dc.typeConference Paperen_AU
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