{"NOAAStudyId":"13134","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":"2012-07-10","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-13134.xml","doi":null,"earliestYearBP":56600000,"earliestYearCE":-56598050,"entryId":"noaa-ocean-13134","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"EAR-0628719, OCE-0903014"},{"fundingAgency":"Deutsche Forschungsgemeinschaft","fundingGrant":null}],"investigators":"Zachos, J.C.; McCarren, H.; Murphy, B.; Röhl, U.; Westerhold, T.","mostRecentYearBP":52100000,"mostRecentYearCE":-52098050,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/13134","originalSource":null,"publication":[{"abstract":"The upper Paleocene and lower Eocene are marked by several prominent \r\n(>1‰) carbon isotope (d13C) excursions (CIE) that coincide with \r\ntransient global warmings, or thermal maxima, including the \r\nPaleocene-Eocene Thermal Maximum (PETM). The CIE, which are recorded \r\nmainly in marine sedimentary sequences, have also been identified \r\nin continental sequences, occurred episodically, and yet appear \r\nto be paced or triggered by orbital forcing. To constrain the timing \r\nand scale of the CIE relative to long-term baseline variability, \r\nwe have constructed a 4.52 million year (myr) long, high-resolution \r\n(~3 kyr) bulk sediment carbon isotope record spanning the lower \r\nEocene to upper Paleocene (C25r-C24n) from a pelagic sediment section \r\nrecovered at ODP Site 1262 in the southeast Atlantic. This section, \r\nwhich was orbitally-tuned utilizing high-resolution core log physical \r\nproperty and geochemical records, is the most stratigraphically \r\ncomplete upper Paleocene to lower Eocene sequence recovered to date. \r\nTime-series analysis of the carbon isotope record along with a high-\r\nresolution Fe intensity record obtained by XRF core scanner reveal \r\ncyclicity with variance concentrated primarily in the precession \r\n(21 kyr) and eccentricity bands (100 and 400-kyr) throughout the \r\nupper Paleocene-lower Eocene. In general, minima in d13C correspond \r\nwith peaks in Fe (i.e., carbonate dissolution), both of which appear \r\nto be in phase with maxima in eccentricity. This covariance is \r\nconsistent with excess oceanic uptake of isotopically depleted \r\ncarbon resulting in lower carbonate saturation during periods \r\nof high eccentricity. This relationship includes all late Paleocene \r\nand early Eocene CIE confirming pacing by orbital forcing. The lone \r\nexception is the PETM, which appears to be out of phase with the \r\n400-kyr cycle, though possibly in phase with the 100-kyr cycle, \r\nreinforcing the notion that a mechanism other than orbital forcing \r\nand/or an additional source of carbon is required to account for \r\nthe occurrence and unusual scale of this event. \r\n","author":null,"citation":"Zachos, J.C., H. McCarren, B. Murphy, U. Röhl, and T. Westerhold. 2010. \r\nTempo and Scale of Late Paleocene and Early Eocene Carbon Isotope \r\nCycles: Implications for the Origin of Hyperthermals. \r\nEarth Planet. Sci. Lett., Vol. 299, pp. 242-249. \r\ndoi:10.1016/j.epsl.2010.09.004 ","edition":null,"identifier":{"id":"10.1016/j.epsl.2010.09.004","type":"doi","url":"http://dx.doi.org/10.1016/j.epsl.2010.09.004"},"issue":null,"journal":"Earth and Planetary Science Letters","pages":null,"pubRank":"1","pubYear":2010,"reportNumber":null,"title":"Tempo and Scale of Late Paleocene and Early Eocene Carbon Isotope  Cycles: Implications for the Origin of Hyperthermals","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["carbon cycle"],"site":[{"NOAASiteId":"53212","geo":{"geoType":"Feature","geometry":{"coordinates":["-27.186","1.577"],"type":"POINT"},"properties":{"easternmostLongitude":"1.577","maxElevationMeters":"-4755","minElevationMeters":"-4755","northernmostLatitude":"-27.186","southernmostLatitude":"-27.186","westernmostLongitude":"1.577"}},"locationName":"Ocean>Atlantic Ocean>South Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"22588","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>carbon isotopes","earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/zachos2010/zachos2010.txt","linkText":"zachos2010.txt","urlDescription":"Original Data and Full Metadata","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":"composited","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 kiloyear before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"bulk sediment","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":"bulk sediment","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>carbon isotopes","earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/zachos2010/zachos2010.xls","linkText":"zachos2010.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"ODP1262-2010","dataTableNotes":null,"earliestYear":56600000,"earliestYearBP":56600000,"earliestYearCE":-56598050,"mostRecentYear":52100000,"mostRecentYearBP":52100000,"mostRecentYearCE":-52098050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP 1262"}],"studyCode":null,"studyName":"Southeast Atlantic ODP1262 Upper Paleocene/Lower Eocene Isotope Data","studyNotes":"Bulk sediment carbon and oxygen isotope record for \nthe composite sections from Ocean Drilling Program \nHoles 1262A, B, and C. \n\nODP Site 1262: 27°11.160'S, 1°34.620'E, 4755m water depth \n","version":"1.0","xmlId":"11176"}