Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/13261
Title: High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends
Authors: Pedro, JB
Smith, AM
Simon, KJ
van Ommen, TD
Curran, MAJ
Keywords: Beryllium 10
Solar activity
Ice
Antarctica
Drill cores
Cosmic ray flux
Mass spectroscopy
Issue Date: 12-Jul-2011
Publisher: Copernicus Publications
Citation: Pedro, 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-7-707-2011
Abstract: Three 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.
Description: This work is distributed under the Creative Commons Attribution 3.0 License.
URI: https://doi.org/10.5194/cp-7-707-2011
https://apo.ansto.gov.au/dspace/handle/10238/13261
ISSN: 1814-9324
Appears in Collections:Journal Articles

Files in This Item:
File Description SizeFormat 
cp-7-707-2011.pdf1.76 MBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.