{"NOAAStudyId":"13565","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2012-11-07","dataPublisher":"NOAA","dataType":"ICE CORES","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/ice-core","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-icecore-13565.xml","doi":null,"earliestYearBP":-49,"earliestYearCE":1999,"entryId":"noaa-icecore-13565","funding":[{"fundingAgency":"Australian Antarctic Division","fundingGrant":"AAS#2384, AAS#3064 and AAS#1172"},{"fundingAgency":"Australian Cooperative Research Centres Programme","fundingGrant":"ACE CRC"},{"fundingAgency":"Australian Institute of Nuclear  Science and Engineering Research (AINSE)","fundingGrant":null},{"fundingAgency":"Australian Nuclear Science and Technology Organisation (ANSTO)","fundingGrant":"CcASH"}],"investigators":"Pedro, J.B.; Heikkilä, U.; Klekociuk, A.; Smith, A.M.; van Ommen, T.D.; Curran, M.A.J.","mostRecentYearBP":-59,"mostRecentYearCE":2009,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13565","originalSource":null,"publication":[{"abstract":"Cosmogenic 10Be measured in polar ice cores has important application in the reconstruction of past solar activity. However, the processes controlling its atmospheric transport and deposition to the ice sheets are not fully understood. Here we use the seasonal changes in 10Be concentrations in a 10 year monthly resolved ice core record from the Law Dome site (East Antarctica) in conjunction with ECHAM5-HAM general circulation model (GCM) simulations of 10Be and 7Be deposition as tools to examine this problem. Maximum 10Be concentrations are observed in the ice core during the austral late summer to early autumn (summer-autumn), while minimum concentrations are observed during the austral winter. The GCM simulations, corroborated by earlier observations of 10Be:7Be ratios in Antarctica from the Georg von Neumayer air sampling station, suggest that the 10Be concentration maximum is linked to direct input of stratospheric 10Be from the Antarctic stratosphere to the lower levels of the Antarctic troposphere during the austral summer-autumn. This result contrasts with the modeled transport of 10Be to Greenland, where the seasonal maximum in stratospheric input is seen in the late winter to spring, synchronous with the timing of the seasonal maximum in midlatitude stratosphere to troposphere exchange. Our results suggest that a different combination of processes is responsible for the transport of 10Be to the Antarctic and Greenland ice sheets. ","author":null,"citation":"Pedro, J.B., U.E. Heikkila, A. Klekociuk, A.M. Smith, T.D. van Ommen, and M.A.J. Curran. 2011. \r\nBeryllium-10 transport to Antarctica: Results from seasonally resolved observations and modeling. \r\nJournal of Geophysical Research (Atmospheres), Vol. 116, D23120. \r\nDOI:  10.1029/2011JD016530","edition":null,"identifier":{"id":"10.1029/2011JD016530","type":"doi","url":"http://dx.doi.org/10.1029/2011JD016530"},"issue":null,"journal":"Journal of Geophysical Research: Atmospheres","pages":null,"pubRank":"1","pubYear":2011,"reportNumber":null,"title":"Beryllium-10 transport to Antarctica: Results from seasonally resolved observations and modeling","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19999","geo":{"geoType":"Feature","geometry":{"coordinates":["-66.73","112.83"],"type":"POINT"},"properties":{"easternmostLongitude":"112.83","maxElevationMeters":"1390","minElevationMeters":"1390","northernmostLatitude":"-66.73","southernmostLatitude":"-66.73","westernmostLongitude":"112.83"}},"locationName":"Continent>Antarctica","mappable":"Y","paleoData":[{"NOAADataTableId":"23277","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>radiogenic isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2011-10be-composite-revised.txt","linkText":"law2011-10be-composite-revised.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age>ice age"},{"cvAdditionalInfo":"atom per milligram","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"chemical composition>isotope>single isotope concentration>10Be"},{"cvAdditionalInfo":"atom per milligram","cvDataType":"ICE CORES","cvDetail":null,"cvError":"one standard error","cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"chemical composition>isotope>single isotope concentration>10Be"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"law2011composite10Be-revised","dataTableNotes":null,"earliestYear":1999,"earliestYearBP":-49,"earliestYearCE":1999,"mostRecentYear":2009,"mostRecentYearBP":-59,"mostRecentYearCE":2009,"species":[],"timeUnit":"AD"}],"siteName":"Law Dome"}],"studyCode":null,"studyName":"Law Dome, Antarctica High Resolution 1999-2009 10Be Data, Revised Dating","studyNotes":"Revised dating from Pedro et al., J. Geophys. Res., 2011. Reference for the original data: Pedro et al., Climate of the Past 7:707\n\nThis record comprises composite 10Be concentrations from three Law Dome ice cores (DSS0506-core, DSS0809-core and DSS0910-core).\nSample dating is revised from that presented in Pedro et al., 7, 707-721, 2011 by accounting for sub-seasonal variability in\nsnow accumulation. The accumulation record was derived from the European Center for Medium-Range Weather Forecasts Interim\n\nReanalysis (ERA-Interim). See Appendix 1 of Pedro et al., J. Geophys. Res. 116, D23120, 2011 for details of method. \n\nNote: 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)","version":"1.0","xmlId":"11606"}