{"NOAAStudyId":"15536","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":"2013-11-20","dataPublisher":"NOAA","dataType":"OTHER COLLECTIONS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/other-collections","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-other-15536.xml","doi":null,"earliestYearBP":103740,"earliestYearCE":-101790,"entryId":"noaa-other-15536","funding":[{"fundingAgency":"Japan Society for the Promotion of Science (JSPS)","fundingGrant":"Kakenhi 22101005"}],"investigators":"Obrochta, S.P.; Yokoyama, Y.; Morén, J.; Crowley, T.J.","mostRecentYearBP":8240,"mostRecentYearCE":-6290,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/15536","originalSource":null,"publication":[{"abstract":"Marine and lacustrine sediment-based paleoclimate records are often not comparable within the early to middle portion of the last glacial cycle. This is due in part to significant revisions over the past 15 years to the Greenland ice core chronologies commonly used to assign ages outside of the range of radiocarbon dating. Therefore, creation of a compatible chronology is required prior to analysis of the spatial and temporal nature of climate variability at multiple locations. Here we present an automated mathematical function that updates GISP2-based chronologies to the newer, NGRIP GICC05 age scale between 8.24 and 103.74 ka b2k. The script uses, to the extent currently available, climate-independent volcanic synchronization of these two ice cores, supplemented by oxygen isotope alignment. The modular design of the script allows substitution for a more comprehensive volcanic matching, once it becomes available. Usage of this function highlights on the GICC05 chronology, for the first time for the entire last glaciation, the proposed global climate relationships during the series of large and rapid millennial stadial-interstadial events.","author":{"name":"Stephen P. Obrochta, Yusuke Yokoyama, Jan Morén, Thomas J. Crowley"},"citation":"Stephen P. Obrochta, Yusuke Yokoyama, Jan Morén, Thomas J. Crowley. 2014. Conversion of GISP2-based sediment core age models to the GICC05 extended chronology. Quaternary Geochronology, 20, 1-7. doi: 10.1016/j.quageo.2013.09.001","edition":null,"identifier":{"id":"10.1016/j.quageo.2013.09.001","type":"doi","url":"http://dx.doi.org/10.1016/j.quageo.2013.09.001"},"issue":null,"journal":"Quaternary Geochronology","pages":"1-7","pubRank":"1","pubYear":2014,"reportNumber":null,"title":"Conversion of GISP2-based sediment core age models to the GICC05 extended chronology","type":"publication","volume":"20"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"22723","geo":{"geoType":"Feature","geometry":{"coordinates":["-90","90","-180","180"],"type":"POLYGON"},"properties":{"easternmostLongitude":"180","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"90","southernmostLatitude":"-90","westernmostLongitude":"-180"}},"locationName":"Geographic Region>Global","mappable":"N","paleoData":[{"NOAADataTableId":"25501","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/softlib/g2n/readme-obrochta2014.txt","linkText":"readme-obrochta2014.txt","urlDescription":"Readme","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/softlib/g2n/g2n-python.zip","linkText":"g2n-python.zip","urlDescription":"Data","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/softlib/g2n/g2n.m","linkText":"g2n.m","urlDescription":"Data","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/softlib/g2n/g2nties.mat","linkText":"g2nties.mat","urlDescription":"Data","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/softlib/g2n/g2nties.txt","linkText":"g2nties.txt","urlDescription":"Data","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>others"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/softlib/g2n/g2nties.xlsx","linkText":"g2nties.xlsx","urlDescription":"Data","variables":[]}],"dataTableName":"Obrochta2014g2n","dataTableNotes":null,"earliestYear":103740,"earliestYearBP":103740,"earliestYearCE":-101790,"mostRecentYear":8240,"mostRecentYearBP":8240,"mostRecentYearCE":-6290,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Global"}],"studyCode":null,"studyName":"GISP2-GICC05 Chronology Conversion Software","studyNotes":"An automated mathematical function that updates GISP2-based chronologies to the newer, NGRIP GICC05 age scale \nbetween 8.24 and 103.74 ka b2k.  Matlab (file g2n.m) and python (stored in compressed file g2n-python.zip) versions  \nare included, plus tie point data input files in text, Excel, or Matlab format (g2nties.txt, g2nties.xlsx, g2nties.mat).  \nMatlab files can be read with Matlab software or the open source version octave. The python version can also be run \nas an online utility, available at: http://paleo10.org/g2n/","version":"1.0","xmlId":"13339"}