{"NOAAStudyId":"2587","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":"2001-01-01","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-2587.xml","doi":null,"earliestYearBP":null,"earliestYearCE":null,"entryId":"noaa-ocean-2587","funding":[],"investigators":"Ravizza, G.; Norris, R.N.; Blusztajn, J.; Aubry, M-P.","mostRecentYearBP":null,"mostRecentYearCE":null,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/2587","originalSource":null,"publication":[{"abstract":"In the latest Paleocene an abrupt shift to more negative delta13C values has been documented at numerous marine and terrestrial sites [Bralower et al., 1997; Cramer et al., 1999; Kaiho et al., 1996; Kennett and Stott, 1991; Koch et al., 1992; Stott et al., 1996; Thomas and Shackleton, 1996; Zachos et al., 1993]. This carbon isotope event (CIE) is coincident with oxygen isotope data that indicate warming of surface waters at high latitudes of nearly 4°--6 °C [Kennett and Stott, 1991] and more moderate warming in the subtropics [Thomas et al., 1999]. Here we report 187Os/188Os isotope records from the North Atlantic and Indian Oceans which demonstrate a >10% increase in the 187Os/188Os ratio of seawater coincident with the late Paleocene CIE. This excursion to higher 187Os/188Os ratios is consistent with a global increase in weathering rates. The inference of increased chemical weathering during this interval of unusual warmth is significant because it provides empirical evidence supporting the operation of a feedback between chemical weathering rates and warm global climate, which acts to stabilize Earth's climate [Walker et al., 1981]. Estimates of the duration of late Paleocene CIE [Bains et al., 1999; Bralower et al., 1997; Norris and Röhl, 1999; Röhl et al., 2000] in conjunction with the Os isotope data imply that intensified chemical weathering in response to warm, humid climates can occur on timescales of 104--105 years. This interpretation requires that the late Palcocene thermal maximum Os isotope excursion be produced mainly by increased Os flux to the ocean rather than a transient excursion to higher 187Os/188Os ratios in river runoff. Although we argue that the former is more likelythan the latter, we cannot rule out significant changes in the 187Os/188Os ratio of rivers.","author":null,"citation":"Ravizza, G., R.N. Norris, J. Blusztajn, and M-P. Aubry. 2001. An osmium isotope excursion associated with the late Paleocene thermal maximum: Evidence of intensified chemical weathering. Paleoceanography 16(2):155-163.","edition":null,"identifier":null,"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2001,"reportNumber":null,"title":"An osmium isotope excursion associated with the late Paleocene thermal maximum: Evidence of intensified chemical weathering","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19191","geo":{"geoType":"Feature","geometry":{"coordinates":["-10.22","93.9"],"type":"POINT"},"properties":{"easternmostLongitude":"93.9","maxElevationMeters":"-5601","minElevationMeters":"-5601","northernmostLatitude":"-10.22","southernmostLatitude":"-10.22","westernmostLongitude":"93.9"}},"locationName":"Ocean>Indian Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"4225","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>carbon isotopes","earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/ravizza2001","linkText":"ravizza2001","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/dsdp213-tab.txt","linkText":"dsdp213-tab.txt","urlDescription":"Alternate Format Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per trillion","cvWhat":"chemical composition>element or single-element molecule>osmium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Os/188Os"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per trillion","cvWhat":"chemical composition>element or single-element molecule>rhenium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Re/188Os"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"DSDP213","dataTableNotes":"Marine Osmium records during the late Paleocene thermal maximum interpreted as proxies of terrestrial chemical weathering. Reported uncertainties in 187Os/188Os ratios are based on 2sigma in-run counting statistics.","earliestYear":null,"earliestYearBP":null,"earliestYearCE":null,"mostRecentYear":null,"mostRecentYearBP":null,"mostRecentYearCE":null,"species":[],"timeUnit":null}],"siteName":"DSDP 213"},{"NOAASiteId":"19192","geo":{"geoType":"Feature","geometry":{"coordinates":["49.088","-13.098"],"type":"POINT"},"properties":{"easternmostLongitude":"-13.098","maxElevationMeters":"-2515","minElevationMeters":"-2515","northernmostLatitude":"49.088","southernmostLatitude":"49.088","westernmostLongitude":"-13.098"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"4226","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>carbon isotopes","earth science>paleoclimate>paleocean>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/ravizza2001","linkText":"ravizza2001","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/dsdp549-tab.txt","linkText":"dsdp549-tab.txt","urlDescription":"Alternate Format Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per trillion","cvWhat":"chemical composition>element or single-element molecule>osmium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Os/188Os"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"parts per trillion","cvWhat":"chemical composition>element or single-element molecule>rhenium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>isotope>isotope ratio>187Re/188Os"}]}],"dataTableName":"DSDP549","dataTableNotes":"Marine Osmium records during the late Paleocene thermal maximum interpreted as proxies of terrestrial chemical weathering. Reported uncertainties in 187Os/188Os ratios are based on 2sigma in-run counting statistics.","earliestYear":null,"earliestYearBP":null,"earliestYearCE":null,"mostRecentYear":null,"mostRecentYearBP":null,"mostRecentYearCE":null,"species":[],"timeUnit":null}],"siteName":"DSDP 549"}],"studyCode":null,"studyName":"Late Paleocene Osmium Isotope Data ","studyNotes":null,"version":"1.0","xmlId":"1586"}