{"NOAAStudyId":"21092","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":"2016-12-21","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-21092.xml","doi":null,"earliestYearBP":11000,"earliestYearCE":-9050,"entryId":"noaa-icecore-21092","funding":[{"fundingAgency":"Swedish Research Council VR","fundingGrant":"2013-8421"}],"investigators":"Adolphi, F.; Muscheler, R.","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/21092","originalSource":null,"publication":[{"abstract":"Investigations of past climate dynamics rely on accurate and precise chronologies of the employed climate reconstructions. The radiocarbon dating calibration curve (IntCal13) and the Greenland ice core chronology (GICC05) represent two of the most widely used chronological frameworks in paleoclimatology of the past ~50,000 years. However, comparisons of climate records anchored on these chronologies are hampered by the precision and accuracy of both timescales. Here we use common variations in the production rates of 14C and 10Be recorded in tree-rings and ice cores, respectively, to assess the differences between both timescales during the Holocene. Compared to earlier work, we employ a novel statistical approach which leads to strongly reduced and yet, more robust, uncertainty estimates. Furthermore, we demonstrate that the inferred timescale differences are robust independent of (i) the applied ice core 10Be records, (ii) assumptions of the mode of 10Be deposition, as well as (iii) carbon cycle effects on 14C, and (iv) in agreement with independent estimates of the timescale differences. Our results imply that the GICC05 counting error is likely underestimated during the most recent 2000 years leading to a dating bias that propagates throughout large parts of the Holocene. Nevertheless, our analysis indicates that the GICC05 counting error is generally a robust uncertainty measurement but care has to be taken when treating it as a nearly Gaussian error distribution. The proposed IntCal13-GICC05 transfer function facilitates the comparison of ice core and radiocarbon dated paleoclimate records at high chronological precision.","author":{"name":"F. Adolphi and R. Muscheler"},"citation":"F. Adolphi and R. Muscheler. 2016. Synchronizing the Greenland ice core and radiocarbon timescales over the Holocene - Bayesian wiggle-matching of cosmogenic radionuclide records . Climate of the Past, 12(1), 15-30. doi: 10.5194/cp-12-15-2016","edition":null,"identifier":{"id":"10.5194/cp-12-15-2016","type":"doi","url":"http://dx.doi.org/10.5194/cp-12-15-2016"},"issue":"1","journal":"Climate of the Past","pages":"15-30","pubRank":"1","pubYear":2016,"reportNumber":null,"title":"Synchronizing the Greenland ice core and radiocarbon timescales over the Holocene - Bayesian wiggle-matching of cosmogenic radionuclide records ","type":"publication","volume":"12"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"54951","geo":{"geoType":"Feature","geometry":{"coordinates":["60","82","-60","-20"],"type":"POLYGON"},"properties":{"easternmostLongitude":"-20","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"82","southernmostLatitude":"60","westernmostLongitude":"-60"}},"locationName":"Continent>North America>Greenland","mappable":"N","paleoData":[{"NOAADataTableId":"31806","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>age control","earth science>paleoclimate>ice core>radiogenic isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/gicc05adolphi2016.txt","linkText":"GICC05 - IntCal13 Holocene Timescale Differences","urlDescription":"Data File","variables":[{"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"},{"cvAdditionalInfo":"IntCal13-GICC05 age difference","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year","cvWhat":"age variable>age"},{"cvAdditionalInfo":"IntCal13-GICC05 age difference lower 68.2% confidence","cvDataType":"ICE CORES","cvDetail":null,"cvError":"68% confidence interval lower bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year","cvWhat":"age variable>age"},{"cvAdditionalInfo":"IntCal13-GICC05 age difference upper 68.2% confidence","cvDataType":"ICE CORES","cvDetail":null,"cvError":"68% confidence interval upper bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year","cvWhat":"age variable>age"},{"cvAdditionalInfo":"IntCal13-GICC05 age difference lower 95.4% confidence","cvDataType":"ICE CORES","cvDetail":null,"cvError":"95% confidence interval lower bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year","cvWhat":"age variable>age"},{"cvAdditionalInfo":"IntCal13-GICC05 age difference upper 95.4% confidence","cvDataType":"ICE CORES","cvDetail":null,"cvError":"95% confidence interval upper bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year","cvWhat":"age variable>age"}]}],"dataTableName":"GICC05-IntCal13diff","dataTableNotes":null,"earliestYear":11000,"earliestYearBP":11000,"earliestYearCE":-9050,"mostRecentYear":0,"mostRecentYearBP":0,"mostRecentYearCE":1950,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Greenland"}],"studyCode":null,"studyName":"Greenland Ice Core (GICC05) and Radiocarbon (IntCal13) Holocene Timescale Differences","studyNotes":"Greenland ice core timescale (GICC05) and tree-ring based radiocarbon calibration timescale (IntCal13) timescale differences over the Holocene","version":"1.0","xmlId":"19032"}