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dc.contributor.authorPedro, JB-
dc.contributor.authorSmith, AM-
dc.contributor.authorSimon, KJ-
dc.contributor.authorvan Ommen, TD-
dc.contributor.authorCurran, MAJ-
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_US
dc.descriptionThis work is distributed under the Creative Commons Attribution 3.0 License.en_US
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_US
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_US
dc.publisherCopernicus Publicationsen_US
dc.subjectBeryllium 10en_US
dc.subjectSolar activityen_US
dc.subjectDrill coresen_US
dc.subjectCosmic ray fluxen_US
dc.subjectMass spectroscopyen_US
dc.titleHigh-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trendsen_US
dc.typeJournal Articleen_US
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