Characterization of in situ cosmogenic 14CO in glacial ice and applications of ice core 14CO as a tracer

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dc.contributor.authorPetrenko, VVen_AU
dc.contributor.authorHmiel, Ben_AU
dc.contributor.authorDyonisius, MNen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorNeff, PDen_AU
dc.contributor.authorBenZvi, Sen_AU
dc.date.accessioned2023-01-26T23:09:18Zen_AU
dc.date.available2023-01-26T23:09:18Zen_AU
dc.date.issued2022-12-15en_AU
dc.date.statistics2023-01-19en_AU
dc.description.abstractCarbon-14 (14C) is included in glacial ice via trapping of air and in situ cosmogenic production. In the carbon monoxide phase (14CO), ice core 14C has two promising applications. First, the trapped atmospheric component of 14CO has the potential to serve as a tracer of past hydroxyl radical (OH) abundance and variability. Second, the in situ cosmogenic component can in principle be used to reconstruct variations in the past flux of galactic cosmic rays. A detailed understanding of the in situ cosmogenic 14CO production and retention in ice is needed to disentangle the trapped atmospheric and in situ cosmogenic components in measurements of ice core 14CO. We will present the most recent interpretations of ice core 14CO measurements from Taylor Glacier, Antarctica and Summit, Greenland. Taylor Glacier is an ablation site with easily accessible ancient (>50 kyr) ice at the surface that allows for the determination of in situ cosmogenic 14CO production rates in the absence of a trapped atmospheric component. Summit is a traditional ice coring site that allows for the examination of how well in situ cosmogenic 14CO is retained in the firn. The results form the basis for the interpretation of new measurements from Law Dome, Antarctica, which are aimed at reconstructing paleoatmospheric 14CO. The results also support the feasibility of using 14CO measurements at a low-accumulation site such as Dome C, Antarctica to study past variations in the galactic cosmic ray flux.en_AU
dc.identifier.articlenumberC32D-0863en_AU
dc.identifier.booktitleAGU Fall Meeting Abstractsen_AU
dc.identifier.citationPetrenko, V. V., Hmiel, B., Dyonisius , M., Smith, A. M., Neff., P. D., BenZvi, S. (2022). Characterization of in situ cosmogenic 14CO in glacial ice and applications of ice core 14CO as a tracer. Presentation to the AGU Fall Meeting, Chicago, IL & Online Everywhere, 12-16 December 2022. In AGU Fall Meeting Abstracts (Vol. 2022, C32D-0863). Retieved from: https://agu.confex.com/agu/fm22/meetingapp.cgi/Paper/1176433B43F-2192).en_AU
dc.identifier.conferenceenddate16 December 2022en_AU
dc.identifier.conferencenameAGU Fall Meetingen_AU
dc.identifier.conferenceplaceChicago, IL & Online Everywhereen_AU
dc.identifier.conferencestartdate12 December 2022en_AU
dc.identifier.urihttps://agu.confex.com/agu/fm22/meetingapp.cgi/Paper/1176433en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14512en_AU
dc.identifier.volume2022en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Union (AGU)en_AU
dc.subjectCarbon 14en_AU
dc.subjectGlaciersen_AU
dc.subjectIceen_AU
dc.subjectTracer techniquesen_AU
dc.subjectDrill coresen_AU
dc.subjectAntarctic regionsen_AU
dc.subjectGreenlanden_AU
dc.titleCharacterization of in situ cosmogenic 14CO in glacial ice and applications of ice core 14CO as a traceren_AU
dc.typeConference Presentationen_AU
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