{"NOAAStudyId":"2483","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":"2005-07-01","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-2483.xml","doi":null,"earliestYearBP":31250,"earliestYearCE":-29300,"entryId":"noaa-icecore-2483","funding":[],"investigators":"Lal, D.; Jull, A.J.T.; Pollard, D.; Vacher, L.","mostRecentYearBP":375,"mostRecentYearCE":1575,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/2483","originalSource":null,"publication":[{"abstract":null,"author":null,"citation":"Lal, D., A.J.T. Jull, D. Pollard, and L. Vacher. 2005. Evidence for large century time-scale changes in solar activity in the past 32 Kyr, based on in-situ cosmogenic 14C in ice at Summit, Greenland.  Earth and Planetary Science Letters 234, pp. 335-349.","edition":null,"identifier":null,"issue":null,"journal":"Earth and Planetary Science Letters","pages":null,"pubRank":"1","pubYear":2005,"reportNumber":null,"title":"Evidence for large century time-scale changes in solar activity in the past 32 Kyr, based on in-situ cosmogenic 14C in ice at Summit, Greenland","type":"publication","volume":null}],"reconstruction":"Y","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":"38166","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>atmospheric gas"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/cosmoiso/gisp2-14c-2005.txt","linkText":"gisp2-14c-2005.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>sample identification"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE FORCING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"earth system variable>forcing variable>cosmic ray flux"},{"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"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter per year","cvWhat":"formation property>formation rate>accumulation rate"},{"cvAdditionalInfo":"atom per gram","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"count per gram","cvWhat":"chemical composition>isotope>single isotope concentration>14C"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"atmospheric material>bulk atmosphere","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>14CO/(14CO+14CO2)"}]}],"dataTableName":"GISP2 14C Lal2005","dataTableNotes":"From pub Table 1. Measured net 14C concentrations in GISP2 ice samples, corrected for radioactive decay and secondary 14C produced after extraction from the site, the corresponding relative cosmic ray fluxes during accumulation of the sample, and the observed partitioning of 14C activity in the 14CO and 14CO2 phases.  For details of the experimental procedures, reference is made to Lal et al. 2000.","earliestYear":31250,"earliestYearBP":31250,"earliestYearCE":-29300,"mostRecentYear":375,"mostRecentYearBP":375,"mostRecentYearCE":1575,"species":[],"timeUnit":"cal yr BP"}],"siteName":"GISP2"}],"studyCode":null,"studyName":"GISP2 - in-situ cosmogenic 14C","studyNotes":null,"version":"1.0","xmlId":"1250"}