{"NOAAStudyId":"22190","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":"2017-05-26","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-22190.xml","doi":null,"earliestYearBP":22000,"earliestYearCE":-20050,"entryId":"noaa-ocean-22190","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE0825280, OCE1219739"}],"investigators":"Mekik, F.","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22190","originalSource":null,"publication":[{"abstract":"Sedimentation rate, bioturbation, winnowing, and calcite dissolution produce significant radiocarbon age offsets among multiple species of coexisting planktonic foraminifers and pteropod fragments. We compare the radiocarbon age of foraminifer species and pteropod fragments with estimates of percent calcite dissolved made with a sedimentary proxy (Globorotalia menardii fragmentation index-MFI) to delineate the effect of dissolution on radiocarbon age of foraminifers. Data from two core top transects on the Rio Grande Rise (RIO) and Ontong Java Plateau (OJP) and from down core sediments of varying sedimentation rates in the tropical Pacific (ME-27, MD98 2177, and MW91-9 56GGC) reveal that sediments with the greatest accumulation rates produce the least age offsets among coexisting species. Age offsets among coexisting foraminifers are about 3500 years on RIO, and 1000 years on OJP. Two core tops from RIO yield an age of the Last Glacial Maximum possibly due to mass displacement of younger sediments downslope. Foraminifer age increases with increasing dissolution and there is a consistent pattern of older foraminifer fragments coexisting with younger whole shells of the same species. The only exception is sediments which have experienced high dissolution where fragments are younger than whole shells. The age offset between fragments of G. menardii and its coexisting whole shells does not exceed the age offset among other coexisting foraminifer species in the same core tops.","author":{"name":"Figen Mekik"},"citation":"Figen Mekik. 2014. Radiocarbon dating of planktonic foraminifer shells: A cautionary tale. Paleoceanography, 29(1), 13-29. doi: 10.1002/2013PA002532","edition":null,"identifier":{"id":"10.1002/2013PA002532","type":"doi","url":"http://dx.doi.org/10.1002/2013PA002532"},"issue":"1","journal":"Paleoceanography","pages":"13-29","pubRank":"1","pubYear":2014,"reportNumber":null,"title":"Radiocarbon dating of planktonic foraminifer shells: A cautionary tale","type":"publication","volume":"29"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"55772","geo":{"geoType":"Feature","geometry":{"coordinates":["-5","5","159","-80"],"type":"POLYGON"},"properties":{"easternmostLongitude":"-80","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"5","southernmostLatitude":"-5","westernmostLongitude":"159"}},"locationName":"Ocean>Pacific Ocean","mappable":"N","paleoData":[{"NOAADataTableId":"33304","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>age 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