High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends

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dc.contributor.authorPedro, JBen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorSimon, KJen_AU
dc.contributor.authorvan Ommen, TDen_AU
dc.contributor.authorCurran, MAJen_AU
dc.date.accessioned2022-06-02T20:50:22Zen_AU
dc.date.available2022-06-02T20:50:22Zen_AU
dc.date.issued2011-07-12en_AU
dc.date.statistics2022-05-19en_AU
dc.descriptionThis work is distributed under the Creative Commons Attribution 3.0 License.en_AU
dc.description.abstractThree near-monthly resolution 10Be records are presented from the Dome Summit South (DSS) ice core site, Law Dome, East Antarctica. The chemical preparation and Accelerator Mass Spectrometer (AMS) measurement of these records is described. The reproducibility of 10Be records at DSS is assessed through intercomparison of the ice core data with data from two previously published and contemporaneous snow pits. We find generally good agreement between the five records, comparable to that observed between other trace chemical records from the site. This result allays concerns raised by a previous Antarctic study (Moraal et al., 2005) about poor reproducibility of ice core 10Be records. A single composite series is constructed from the three ice cores providing a monthly-resolved record of 10Be concentrations at DSS over the past decade (1999 to 2009). To our knowledge, this is the first published ice core data spanning the recent exceptional solar minimum of solar cycle 23. 10Be concentrations are significantly correlated to the cosmic ray flux recorded by the McMurdo neutron monitor (rxy = 0.64, with 95 % CI of 0.53 to 0.71), suggesting that solar modulation of the atmospheric production rate may explain up to ~40 % of the variance in 10Be concentrations at DSS. Sharp concentration peaks occur in most years during the summer-to-autumn, possibly caused by stratospheric incursions. Our results underscore the presence of both production and meteorological signals in ice core 10Be data. © Author(s) 2011.en_AU
dc.description.sponsorshipThe authors acknowledge support from the Australian Antarctic Division (Australian Antarctic Science Projects AAS#2384, AAS#3064 and AAS#1172), the Australian Governments Cooperative Research Centres Programme through the Antarctic Ecosystems and Climate Cooperative Research Centre (ACE CRC), the Australian Institute of Nuclear Science and Engineering (AINSE) and the Cosmogenic Climate Archives of the Southern Hemisphere (CcASH) project in the Institute for Research at the Australian Nuclear Science and Technology Organisation (ANSTO). J. B. P. is supported by an Australian Post-Graduate Award and an AINSE Post-Graduate Award. We thank the Bartol Research Institute neutron monitor programme, supported by National Science Foundation grant ATM-0527878, for making the McMurdo neutron record available.en_AU
dc.identifier.citationPedro, J. B., Smith, A. M., Simon, K. J., van Ommen, T. D., & Curran, M. A. J. (2011). High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends. Climate of the Past, 7(3), 707-721.doi:10.5194/cp-7-707-2011en_AU
dc.identifier.issn1814-9324en_AU
dc.identifier.issue3en_AU
dc.identifier.journaltitleClimate of the Pasten_AU
dc.identifier.pagination707-721en_AU
dc.identifier.urihttps://doi.org/10.5194/cp-7-707-2011en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13261en_AU
dc.identifier.volume7en_AU
dc.language.isoenen_AU
dc.publisherCopernicus Publicationsen_AU
dc.subjectBeryllium 10en_AU
dc.subjectSolar activityen_AU
dc.subjectIceen_AU
dc.subjectAntarcticaen_AU
dc.subjectDrill coresen_AU
dc.subjectCosmic ray fluxen_AU
dc.subjectMass spectroscopyen_AU
dc.titleHigh-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trendsen_AU
dc.typeJournal Articleen_AU
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