{"NOAAStudyId":"22811","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":"2017-10-11","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-22811.xml","doi":null,"earliestYearBP":36620000,"earliestYearCE":-36618050,"entryId":"noaa-ocean-22811","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"1061061"}],"investigators":"Paquay, F.S.; Ravizza, G.; Coccioni, R.","mostRecentYearBP":32843000,"mostRecentYearCE":-32841050,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22811","originalSource":null,"publication":[{"abstract":"A reconstruction of seawater 187Os/188Os ratios during the late Eocene (∼36–34 Ma), based upon bulk sediment analyses from the sub-Antarctic Southern Atlantic Ocean (Ocean Drilling Program (ODP) Site 1090), Eastern Equatorial Pacific Ocean (ODP Sites 1218 and 1219) and the uplifted (land-based) Tethyan section (Massignano, Italy), confirms that the previously reported abrupt shift to lower 187Os/188Os is a unique global feature of the marine Os isotope record that occurs in magnetochron C16n.1n. This feature is interpreted to represent the change in seawater 187Os/188Os caused by the Popigai impact event. Higher in the Massignano section, two other iridium anomalies previously proposed to represent additional impact events do not show a comparable excursion to low 187Os/188Os, suggesting that these horizons do not record multiple large impacts. Comparison of records from three different ocean basins indicates that seawater 187Os/188Os begins to decline in advance of the Popigai impact event. At Massignano this decline coincides with a previously reported episode of elevated 3He flux, suggesting that increased influx of interplanetary dust particles (IDPs) contributed to the pre-impact shift in 187Os/188Os and not to the longer-term latest Eocene 187Os/188Os decline that occurred ∼1 million year after the Popigai impact event.","author":{"name":"Paquay, Francois S., Greg Ravizza, and Rodolpho Coccioni"},"citation":"Paquay, Francois S., Greg Ravizza, and Rodolpho Coccioni. 2014. The influence of extraterrestrial material on the late Eocene marine Os isotope record. Geochimica et Cosmochimica Acta, 144, 238-257. doi: 10.1016/j.gca.2014.08.024","edition":null,"identifier":{"id":"10.1016/j.gca.2014.08.024","type":"doi","url":"http://dx.doi.org/10.1016/j.gca.2014.08.024"},"issue":null,"journal":"Geochimica et Cosmochimica Acta","pages":"238-257","pubRank":"1","pubYear":2014,"reportNumber":null,"title":"The influence of extraterrestrial material on the late Eocene marine Os isotope record","type":"publication","volume":"144"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"56827","geo":{"geoType":"Feature","geometry":{"coordinates":["-42.913687","8.899737"],"type":"POINT"},"properties":{"easternmostLongitude":"8.899737","maxElevationMeters":"-3702","minElevationMeters":"-3702","northernmostLatitude":"-42.913687","southernmostLatitude":"-42.913687","westernmostLongitude":"8.899737"}},"locationName":"Ocean>Atlantic Ocean>South Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"33974","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope","earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/paquay2014/paquay2014-odp1090b.txt","linkText":"ODP 1090B Osmium Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"ODP site-core-section-depth designation. This study (30X-1W-15/17 to 30X-3W-144/146 and 30X-5W-97/98 to 30X-5W-113.5/115.5) and from Paquay et al. (2008). “R” indicates a duplicate analysis (different sample powder).","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"meters composite depth","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Bulk Sediment Digestion by NiS Fire Assay","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Os/188Os"},{"cvAdditionalInfo":"Bulk Sediment Digestion by NiS Fire Assay","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard error","cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Os/188Os"},{"cvAdditionalInfo":"bulk sediment; by isotope dilution","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"picogram per gram","cvWhat":"chemical composition>element or single-element molecule>osmium"}]}],"dataTableName":"ODP1090B Os Paquay2014","dataTableNotes":"This study (30X-1W-15/17 to 30X-3W-144/146 and 30X-5W-97/98 to 30X-5W-113.5/115.5) and from Paquay et al. (2008). “R” indicates a duplicate analysis (different sample powder)","earliestYear":36010000,"earliestYearBP":36010000,"earliestYearCE":-36008050,"mostRecentYear":35010000,"mostRecentYearBP":35010000,"mostRecentYearCE":-35008050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP 1090B"},{"NOAASiteId":"57166","geo":{"geoType":"Feature","geometry":{"coordinates":["8.8894","-135.3667"],"type":"POINT"},"properties":{"easternmostLongitude":"-135.3667","maxElevationMeters":"-4828","minElevationMeters":"-4828","northernmostLatitude":"8.8894","southernmostLatitude":"8.8894","westernmostLongitude":"-135.3667"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"33975","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope","earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/paquay2014/paquay2014-odp1218.txt","linkText":"ODP 1218 Osmium Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"ODP site-core-section-depth designation","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"Data source: This Study Or Dalai et al. 2006 EPSL 241:477-492","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>notes"},{"cvAdditionalInfo":"meters below seafloor","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"Bulk Sediment Digestion by NiS Fire Assay","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Os/188Os"},{"cvAdditionalInfo":"Bulk Sediment Digestion by NiS Fire Assay","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard error","cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Os/188Os"},{"cvAdditionalInfo":"bulk sediment; by isotope dilution","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"picogram per gram","cvWhat":"chemical composition>element or single-element molecule>osmium"}]}],"dataTableName":"ODP1218 Os Paquay2014","dataTableNotes":"Data source: This Study Or Dalai et al. 2006 EPSL 241:477-492. Age model is detailed in the publication.","earliestYear":36511000,"earliestYearBP":36511000,"earliestYearCE":-36509050,"mostRecentYear":32843000,"mostRecentYearBP":32843000,"mostRecentYearCE":-32841050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP 1218"},{"NOAASiteId":"57490","geo":{"geoType":"Feature","geometry":{"coordinates":["43.5355","13.589333"],"type":"POINT"},"properties":{"easternmostLongitude":"13.589333","maxElevationMeters":"-3702","minElevationMeters":"-4828","northernmostLatitude":"43.5355","southernmostLatitude":"43.5355","westernmostLongitude":"13.589333"}},"locationName":"Continent>Europe>Southern Europe>Italy","mappable":"Y","paleoData":[{"NOAADataTableId":"33973","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>radiogenic isotope","earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/paquay2014/paquay2014-massignano.txt","linkText":"Massignano Osmium Data","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":"meters section level","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"bulk sediment; Digestion by NiS fire assay","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Os/188Os"},{"cvAdditionalInfo":"bulk sediment; Digestion by NiS fire assay","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"two standard error","cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Os/188Os"},{"cvAdditionalInfo":"bulk sediment; by isotope dilution; picogram Os per gram of dry sediment","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"picogram per gram","cvWhat":"chemical composition>element or single-element molecule>osmium"},{"cvAdditionalInfo":"bulk sediment; by isotope dilution","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"picogram per gram","cvWhat":"chemical composition>element or single-element molecule>iridium"},{"cvAdditionalInfo":"bulk sediment; by isotope dilution","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"picogram per gram","cvWhat":"chemical composition>element or single-element molecule>platinum"}]}],"dataTableName":"Massignano Os Paquay2014","dataTableNotes":"Ages determined by linear interpolation between magnet reversals. 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