# Law Dome, Antarctica High Resolution 1999-2009 10Be Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), # and date accessed when using these downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/13564 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-icecore-13564.json # Study_Level_JSON_Description: JSON metadata of this file's parent study, which includes all study metadata. # # Data_Type: Ice Cores # # Dataset_DOI: 10.25921/acyw-jq79 # # Science_Keywords: #-------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2011-10be-dss0809core-noaa.txt # Data_Download_Description: NOAA Template File; 10Be Data # # Original_Source_URL: # Original_Source_Description: # #-------------------- # Contribution_Date # Date: 2012-11-07 #-------------------- # File_Last_Modified_Date # Date: 2022-09-21 #-------------------- # Title # Study_Name: Law Dome, Antarctica High Resolution 1999-2009 10Be Data #-------------------- # Investigators # Investigators: Pedro, J.B.(https://orcid.org/0000-0002-0728-2712); Smith, A.M.; Simon, K.J.(https://orcid.org/0000-0003-4443-4305); van Ommen, T.D.(https://orcid.org/0000-0002-2463-1718); Curran, M.A.J.(https://orcid.org/0000-0003-1874-4086) #-------------------- # Description_Notes_and_Keywords # Description: 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 DSS0910-core), providing a monthly-resolved time-series of 10Be concentrations at DSS over the decade spanning 1999 to 2009. Note that in constructing the composite each individual record is first interpolated onto an even monthly grid. For details refer to Pedro et al, Clim. Past. 7., 707-721, 2011. # # Please note that a revised version of the dating of the composite record is reported in Pedro et al., J. Geophys. Res., 2011. The data with revised dating is available at the AAD data centre and the NOAA WDC Palaeo data servers. # # Standard deviation of the d18O values for repeated measurements of laboratory reference water samples was less than 0.07 %. # # 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 # Journal_Name: Climate of the Past # Published_Title: High-resolution records of the beryllium-10 solar activity proxy in ice from Law Dome, East Antarctica: measurement, reproducibility and principal trends # Published_Date_or_Year: 2011 # Volume: 7 # Pages: 707-721 # Issue: # Report_Number: # DOI: 10.5194/cp-7-707-2011 # Full_Citation: # 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. #-------------------- # Publication # Authors: Pedro, J., van Ommen, T., Curran, M., Morgan, V., Smith, A., and McMorrow, A. # Journal_Name: Journal of Geophysical Research: Atmospheres # Published_Title: Evidence for climate modulation of the 10Be solar activity proxy # Published_Date_or_Year: 2006 # Volume: 111 # Pages: # Issue: D21 # Report_Number: D21105 # DOI: 10.1029/2005JD006764 # Full_Citation: # Abstract: We used a snow pit record in conjunction with detailed snow accumulation data and oxygen isotope records to examine atmospheric transport and deposition effects on 10Be at Law Dome, Antarctica. Data from an adjacent automatic weather station was used to date the record at snowfall event--scale resolution. In contrast to prior ice core studies in Antarctica, the snow pit record is of a sufficiently short duration (~1 year) that 10Be fluctuations reflect mainly atmospheric transport processes rather than solar modulation of production. Elevated concentrations of 10Be were found in the late austral summer and early autumn snow, synchronous with the seasonal increase in stratospheric aerosols at Antarctic stations. A significant (P < 0.01) anticorrelation of 10Be with d18O occurs at the snowfall event scale. Fractionation of water isotopes at Law Dome is controlled by local and regional processes, specifically transport and local temperature. The anticorrelation seen here implies that 10Be concentration was reduced in snow from warmer air masses (characterized by less negative d18O). There is potential for confounding solar modulation with climatic modulation if at sites such as this one, warmer meteorological influences may be associated with reduced 10Be concentrations. Quantification of the significance of this effect for the longer-term 10Be record will require analysis of longer 10Be records from different sites. #-------------------- # Publication # Authors: Pedro, J.B., A.M. Smith, M.L. Duldig, A.R. Klekociuk, K.J. Simon, M.A.J. Curran, T.D. van Ommen, D.A. Fink, V.I. Morgan, and B.K. Galton-Fenzi # Journal_Name: Advances in Geosciences # Published_Title: 10Be Concentrations in snow at Law Dome, Antarctica following the 29 October 2003 and 20 January 2005 Solar Cosmic Ray Events # Published_Date_or_Year: 2009 # Volume: 14 # Pages: 305-319 # Issue: # Report_Number: # DOI: 10.1142/9789812836205_0020 # Full_Citation: # Abstract: Recent model calculations have attempted to quantify the contribution of major energetic solar cosmic ray (SCR) events to 10Be production. In this study we compare modeled 10Be production by SCR events to measured 10Be concentrations in a Law Dome snow pit record. The snow pit record spans 2.7 years, providing a quasi-monthly 10Be sampling resolution which overlaps with the SCR events of 29 Oct 2003 and 20 Jan 2005. These events were calculated to increase monthly 10Be production in the polar atmosphere (>65° S geomagnetic latitude) by ~60% and ~120% above the GCR background, respectively. A strong peak in 10Be concentrations (>4σ above the 2.7 y mean value) was observed ~1 month after the 20 Jan 2005 event. By contrast, no signal in 10Be concentrations was observed following the weaker 29 Oct 2003 series of events. The concentration of 10Be in ice core records involves interplay between production, transport, and deposition processes. We used a particle dispersion model to assess vertical and meridional transport of aerosols from the lower stratosphere where SCR production of 10Be is expected to occur, to the troposphere from where deposition to the ice sheet occurs. Model results suggested that a coherent SCR production signal could be transported to the troposphere within weeks to months following both SCR events. We argue that only the 20 Jan 2005 SCR event was observed in measured concentrations due to favorable atmospheric transport, relatively high production yield compared to the 29 Oct 2003 event, and a relatively high level of precipitation in the Law Dome region in the month following the event. This result encourages further examination of SCR signals in 10Be ice core data. #-------------------- # Funding_Agency # Funding_Agency_Name: Australian Institute of Nuclear Science and Engineering Research (AINSE) # Grant_Number: #-------------------- # Funding_Agency # Funding_Agency_Name: Australian Nuclear Science and Technology Organisation (ANSTO) # Grant_Number: CcASH #-------------------- # Funding_Agency # Funding_Agency_Name: Australian Antarctic Division # Grant_Number: AAS#2384, AAS#3064 and AAS#1172 #-------------------- # Funding_Agency # Funding_Agency_Name: Australian Cooperative Research Centres Programme # Grant_Number: ACE CRC #-------------------- # Site_Information # Site_Name: Law Dome DSS 0809 Core # Location: Antarctica # Northernmost_Latitude: -66.7672 # Southernmost_Latitude: -66.7672 # Easternmost_Longitude: 112.8078 # Westernmost_Longitude: 112.8078 # Elevation: 1370 #-------------------- # Data_Collection # Collection_Name: law2011DSS0809core10Be # First_Year: 2004 # Last_Year: 2008 # Time_Unit: CE # Core_Length: # Parameter_Keywords: radiogenic isotopes # Notes: #-------------------- # Chronology_Information # Chronology: # # # #------------------ # Variables # # PaST_Thesaurus_Download_Resource: https://www.ncdc.noaa.gov/paleo/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # variables format: shortname what,material,error,units,seasonality,data_type,detail,method, C(har) or N(umeric) data,additional information # ## depth_m depth,,,meter,,ice cores,,,N, ## age_AD ice age,,,year Common Era,,ice cores,,,N, ## 10be 10Be,bulk ice,,count per milligram,,ice cores,,accelerator mass spectrometry,N,atom per milligram ## 10Be-err 10Be,bulk ice,one standard error,count per milligram,,ice cores,,accelerator mass spectrometry,N,atom per milligram ## d18OiceVSMOW delta 18O,bulk ice,,per mil VSMOW,,ice cores,,,N, #-------------------- # Data: # Missing_Values: NA 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