{"NOAAStudyId":"17800","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":"1997-11-30","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-17800.xml","doi":null,"earliestYearBP":40056,"earliestYearCE":-38106,"entryId":"noaa-icecore-17800","funding":[],"investigators":"Finkel, R.C.; Nishiizumi, K.","mostRecentYearBP":3308,"mostRecentYearCE":-1358,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/17800","originalSource":null,"publication":[{"abstract":"A nearly continuous record of 10Be (half-life of 1.5x10e6 years) concentrations is reported in the Greenland Ice Sheet Project 2 (GISP2) ice core for the time period between 3288 and 40,055 years B.P. The resolution is between 20 and 50 years in the Holocene. During the Pleistocene, sampling was coarser, with the resolution ranging between 50 and 200 years. Both concentrations and fluxes are reported. Concentrations of 10Be are observed to correlate strongly with d18O and more weakly with snow accumulation rates. Beryllium 10 fluxes show less dependence than do concentrations on climate-related parameters. A good correlation exists between D14C and 10Be for centennial scale variations, which are most likely due to heliomagnetic modulation of the 10Be production rate in the atmosphere. There is no evidence of a long-term geomagnetic effect on the 10Be flux at GISP2. The interpretation of the record depends strongly on the model one uses to infer atmospheric 10Be concentrations from the measured concentrations in snow.","author":{"name":"R. C. Finkel and K. Nishiizumi"},"citation":"R. C. Finkel and K. Nishiizumi. 1997. Beryllium 10 concentrations in the Greenland Ice Sheet Project 2 ice core from 3-40 ka. Journal of Geophysical Research: Oceans, 102(C12), 26699-26706. doi: 10.1029/97JC01282","edition":null,"identifier":{"id":"10.1029/97JC01282","type":"doi","url":"http://dx.doi.org/10.1029/97JC01282"},"issue":"C12","journal":"Journal of Geophysical Research: Oceans","pages":"26699-26706","pubRank":"1","pubYear":1997,"reportNumber":null,"title":"Beryllium 10 concentrations in the Greenland Ice Sheet Project 2 ice core from 3-40 ka","type":"publication","volume":"102"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19978","geo":{"geoType":"Feature","geometry":{"coordinates":["72.6","-38.5"],"type":"POINT"},"properties":{"easternmostLongitude":"-38.5","maxElevationMeters":"3200","minElevationMeters":"3200","northernmostLatitude":"72.6","southernmostLatitude":"72.6","westernmostLongitude":"-38.5"}},"locationName":"Continent>North America>Greenland","mappable":"Y","paleoData":[{"NOAADataTableId":"28120","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>radiogenic isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/cosmoiso/ber10.txt","linkText":"GISP2 10Be concentration 719 - 2253 m","urlDescription":"Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample end"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth>depth at sample start"},{"cvAdditionalInfo":"x1e3 atom per gram","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":"accelerator mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"count per gram","cvWhat":"chemical composition>isotope>single isotope concentration>10Be"},{"cvAdditionalInfo":"x1e3 atom per gram","cvDataType":"ICE CORES","cvDetail":null,"cvError":"unspecified margin of error","cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":"accelerator mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"count per gram","cvWhat":"chemical composition>isotope>single isotope concentration>10Be"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age>ice age at sample end"}]}],"dataTableName":"GISP21997Be10","dataTableNotes":null,"earliestYear":40056,"earliestYearBP":40056,"earliestYearCE":-38106,"mostRecentYear":3308,"mostRecentYearBP":3308,"mostRecentYearCE":-1358,"species":[],"timeUnit":"cal yr BP"}],"siteName":"GISP2"}],"studyCode":null,"studyName":"GISP2 Ice Core 40KYr 10Be Data","studyNotes":"Melted water was collected from the outside of samples taken for cation and anion analysis by the UNH group.  A small aliquot was taken for anion analysis (chloride, nitrate, and sulfate) and the remainder was weakly acidified with HNO3 to yield a final pH of about 2.  Be, Cl and Al carriers were then added.  The Be (and Al and Cl) were concentrated from the melted ice using ion exchange resins.  Be was then eluted from the cation exchange column, precipitated as Be(OH)2 and ignited to BeO for accelerator mass spectrometry (AMS) measurement.  The AMS measurements were carried out at the Lawrence Livermore National Laboratory Center for Accelerator Mass Spectrometry (Davis et al., 1990).  The 10Be (half-life = 1.5 x 10^6 years)  concentration was normalized to an ICN standard (diluted by K. Nishiizumi)  after carrier blank and boron background correction.","version":"1.0","xmlId":"15469"}