Using ice core measurements from Taylor Glacier, Antarctica to calibrate in situ cosmogenic 14C production rates by muons

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dc.contributor.authorDyonisius, MNen_AU
dc.contributor.authorPetrenko, VVen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorHmiel, Ben_AU
dc.contributor.authorNeff, PDen_AU
dc.contributor.authorYang, Ben_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorSchmitt, Jen_AU
dc.contributor.authorShackleton, SAen_AU
dc.contributor.authorBuizert, Cen_AU
dc.contributor.authorPlace, PFen_AU
dc.contributor.authorMenking, JAen_AU
dc.contributor.authorBeaudette, Ren_AU
dc.contributor.authorHarth, CMen_AU
dc.contributor.authorKalk, Men_AU
dc.contributor.authorRoop, Hen_AU
dc.contributor.authorBereiter, Ben_AU
dc.contributor.authorArmanetti, Cen_AU
dc.contributor.authorVimont, Ien_AU
dc.contributor.authorMichel, SEen_AU
dc.contributor.authorBrook, EJen_AU
dc.contributor.authorSeveringhaus, JPen_AU
dc.contributor.authorWeiss, RFen_AU
dc.contributor.authorMcConnell, JRen_AU
dc.date.accessioned2022-05-05T23:00:15Zen_AU
dc.date.available2022-05-05T23:00:15Zen_AU
dc.date.issued2022-01-26en_AU
dc.date.statistics2022-05-05en_AU
dc.descriptionThis preprint is currently under review for the journal TC (The Cryosphere).en_AU
dc.description.abstractCosmic rays entering the Earth’s atmosphere produce showers of secondary particles such as neutrons and muons. The interaction of these neutrons and muons with oxygen-16 (16O) in minerals such as ice and quartz can produce carbon-14 (14C). Analyses of in situ produced cosmogenic 14C in quartz are commonly used to investigate the Earth’s landscape evolution. In glacial ice, 14C is also incorporated through trapping of 14C-containing atmospheric gases (14CO2, 14CO, and 14CH4). Understanding the production rates of in situ cosmogenic 14C is important to deconvolve the in situ cosmogenic and atmospheric 14C signals in ice, both of which contain valuable paleoenvironmental information. Unfortunately, the in situ 14C production rates by muons (which are the dominant production mechanism at depths of > 6 m solid ice equivalent) are uncertain. In this study, we use measurements of in situ 14C in ancient ice (> 50 kilo-annum before present, ka BP) from the Taylor Glacier ablation site, Antarctica in combination with a 2D ice flow model to better constrain the rates of 14C production by muons. We find that the commonly used values for muogenic 14C production rates (Heisinger et al., 2002a, 2002b) in ice are too high by factors of 5.7 (3.6–13.9, 95 % confidence interval) and 3.7 (2.0–11.9 95 % confidence interval) for negative muon capture and fast muon interactions, respectively. Our constraints on muogenic 14C production rates in ice allow for future measurements of 14C in ice cores to be used for other applications and imply that muogenic 14C production rates in quartz are overestimated as well. © Author(s) 2022.en_AU
dc.description.sponsorshipThis work is distributed under the Creative Commons Attribution 4.0 License.en_AU
dc.identifier.articlenumbertc-2021-375en_AU
dc.identifier.citationDyonisius, M., Petrenko, V., Smith, A., Hmiel, B., Neff, P., Yang, B., Hua, Q., Schmitt, J., Shackleton, S., Buizert, C., Place, P., Menking, J., Beaudette, R., Harth, C., Kalk, M., Roop, H., Bereiter, B., Armanetti, C., Vimont, I., Englund Michel, S., Brook, E., Severinghaus, J., Weiss, R., & McConnell, J. (2022). Using ice core measurements from Taylor Glacier, Antarctica to calibrate in situ cosmogenic 14C production rates by muons. The Cryosphere, 1-35, Preprint. doi:10.5194/tc-2021-375en_AU
dc.identifier.issn1994-0424en_AU
dc.identifier.journaltitleThe Cryosphereen_AU
dc.identifier.urihttps://doi.org/10.5194/tc-2021-375en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13130en_AU
dc.language.isoenen_AU
dc.publisherCopernicus Publicationsen_AU
dc.subjectNeutronsen_AU
dc.subjectMuonsen_AU
dc.subjectOxygen 16en_AU
dc.subjectCarbon 14en_AU
dc.subjectIceen_AU
dc.subjectGlaciersen_AU
dc.subjectQuartzen_AU
dc.subjectDrill coresen_AU
dc.subjectAntarcticaen_AU
dc.subjectCalibrationen_AU
dc.titleUsing ice core measurements from Taylor Glacier, Antarctica to calibrate in situ cosmogenic 14C production rates by muonsen_AU
dc.typeJournal Articleen_AU
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