# Law Dome, Antarctica High Resolution 1999-2009 10Be Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original reference when using these data, # plus the Online Resource and date accessed. # # # Online_Resource: http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:13564 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2011-10be-dss0809core.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Ice Cores #-------------------- # Contribution_Date # Date: 2012-11-07 #-------------------- # Title # Study_Name: Law Dome, Antarctica High Resolution 1999-2009 10Be Data #-------------------- # Investigators # Investigators: Pedro, J.B.; Smith, A.M.; Simon, K.J.; van Ommen, T.D.; Curran, M.A.J. #-------------------- # Description_and_Notes # # Five high-resolution (near monthly) records of 10Be concentration in snow from Law Dome, East Antarctica: DSS0102-pit, DSS0506-pit, DSS0506-core, DSS0809-core and DSS0910-core. # A single composite series is constructed from three of these records (DSS0506-core, DSS0809-core and DSS0102-pit), providing a monthly-resolved time-series of 10Be concentrations at DSS over the decade spanning 1999 to 2009. # # Data generated 16 June 2011 Note: All measurements are calibrated to the NIST SRM 4325 10Be standard reference material, utilising the Nishiizumi et al. (2007) 10Be:9Be ratio of (2.79 +/- 0.02) x 10^(-11) # #-------------------- # Publication # Authors: J.B. Pedro, A.M. Smith, K.J. Simon, T.D. van Ommen, and M.A.J. Curran # Published_Date_or_YEAR: 2011-07-12 # Published_Title: High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends # Journal_Name: Climate of the Past # Volume: 7 # Issue: # Pages: 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. # #-------------------- # Funding_Agency # Funding_Agency_Name: Australian Antarctic Division # Grant: AAS#2384, AAS#3064 and AAS#1172 #--------------------- # Funding_Agency # Funding_Agency_Name: Australian Cooperative Research Centres Programme # Grant: ACE CRC #--------------------- # Funding_Agency # Funding_Agency_Name: Australian Institute of Nuclear Science and Engineering (AINSE) # Grant: #--------------------- # Funding_Agency # Funding_Agency_Name: Australian Nuclear Science and Technology Organisation (ANSTO) # Grant: CcASH #--------------------- # Site_Information # Site_Name: Law Dome DSS 0809 Core # Location: >Geographic Region>Antarctica # Country: # Northernmost_Latitude: -66.7672 # Southernmost_Latitude: -66.7672 # Easternmost_Longitude: 112.8078 # Westernmost_Longitude: 112.8078 # Elevation: 1370 m #------------------ # Data_Collection # Core_Name: law2011DSS0809core10Be # First_Year: 2004 # Last_Year: 2008 # Time_Unit: AD # Core_Length: # Notes: #------------------ # Chronology # # # #------------------ # Variables # # End Description/Documentation (lines begin with #) # Data lines follow (have no #) # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: material, error, units, anomaly, period, archive, detail, method, C or N for Character or Numeric data) # Data line format: tab-delimited text, variable short name as header depth_m Depth (m), , , m, , , , N age_AD Age (years AD), , , years AD , , , , N 10be 10Be concentration, , , (atoms/mg) , , , , N 10be-err 10Be concentration standard error, , , (atoms/mg) , , , , N d18OiceVSMOW delta18O ice (per mil VSMOW), , , per mil VSMOW, , , , N depth_m age_AD 10be 10Be-err d18OiceVSMOW 0.07 2008.97 6.25 0.23 -19.49 0.21 2008.88 8.08 0.26 -19.12 0.35 2008.80 8.20 0.26 -21.49 0.49 2008.71 7.35 0.24 -22.70 0.63 2008.62 6.68 0.22 -24.28 0.77 2008.53 6.54 0.23 -26.13 0.91 2008.45 5.55 0.19 -26.39 1.05 2008.36 7.26 0.22 -26.42 1.19 2008.27 7.98 0.29 -24.85 1.33 2008.18 6.77 0.19 -22.20 1.47 2008.10 9.03 0.25 -21.99 1.61 2008.01 6.49 0.36 -19.64 1.75 2007.89 11.50 0.29 -20.16 1.89 2007.77 5.78 0.17 -20.23 2.03 2007.65 8.75 0.24 -23.57 2.17 2007.53 6.07 0.19 -24.44 2.31 2007.41 7.05 0.21 -22.71 2.45 2007.29 10.32 0.28 -21.83 2.59 2007.18 9.91 0.32 -21.79 2.73 2007.06 8.75 0.25 -20.57 2.87 2006.95 7.71 0.21 -21.65 3.01 2006.84 7.16 0.23 -25.01 3.15 2006.74 8.12 0.26 -24.54 3.29 2006.64 8.10 0.21 -26.63 3.43 2006.54 5.41 0.16 -25.81 3.57 2006.43 8.86 0.27 -25.98 3.71 2006.33 5.71 0.18 -25.08 3.85 2006.23 6.38 0.20 -23.52 3.99 2006.13 9.07 0.25 -20.32 4.13 2006.03 11.28 0.29 -21.01 4.27 2005.91 8.06 0.21 -21.81 4.41 2005.80 5.50 0.17 -22.78 4.55 2005.68 5.96 0.31 -23.66 4.69 2005.56 6.18 0.17 -25.14 4.83 2005.45 6.44 0.20 -24.10 4.97 2005.33 13.43 0.33 -24.80 5.11 2005.21 9.47 0.47 -22.46 5.25 2005.10 7.94 0.21 -20.02 5.39 2004.98 4.23 0.13 -18.78 5.53 2004.88 3.91 0.13 -19.05