{"NOAAStudyId":"11934","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":"2011-09-12","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-11934.xml","doi":null,"earliestYearBP":1350400,"earliestYearCE":-1348450,"entryId":"noaa-ocean-11934","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-0452666, OCE-0452878"}],"investigators":"Weirauch, D.; Billups, K.; Martin, P.A.","mostRecentYearBP":411000,"mostRecentYearCE":-409050,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/11934","originalSource":null,"publication":[{"abstract":"We use the oxygen isotopic composition of planktonic foraminifera \r\nGlobigerinoides ruber (white) from Ocean Drilling Program Site 1058 \r\nin the subtropical northwestern Atlantic to construct a high-\r\nresolution (~800 year) climate record spanning the mid-Pleistocene \r\nclimate transition (~410 ka to 1350 ka). We investigate whether \r\nor not millennial-scale instabilities in the proxy record are \r\nassociated with the extent of continental glaciation. G. ruber d18O \r\nvalues display high-frequency fluctuations throughout the record, \r\nbut the amplitude about mean glacial and interglacial d18O values \r\nincreases at marine isotope stage (MIS) 22 (880 ka) and is highest \r\nduring MIS 12. These observations support that millennial-scale \r\nclimate instabilities are associated with ice sheet size. \r\nTime series analysis illustrates that these variations have \r\nsignificant concentration of spectral power centered on periods \r\nof ~10-12 ka and ~5 ka. The timing of these fluctuations agrees \r\nwell, or coincides with, the periodicities of the second and fourth \r\nharmonics, respectively, of precessional forcing at the equator.\r\nAn insolation-based origin of the millennial-scale instabilities \r\nwould be independent of ice volume and explains the presence of \r\nthese fluctuations before the mid-Pleistocene climate transition \r\nas well as during interglacial intervals (e.g., MIS 37 and 17). \r\nBecause the amplitude of the millennial-scale variations increases \r\nduring the mid-Pleistocene transition, feedback mechanisms \r\nassociated with the growth of large, 100-ka-paced, polar ice sheets \r\nmay be important amplifiers of regional surface water hydrographic \r\nchanges.\r\n","author":null,"citation":"Weirauch, D., K. Billups, and P. Martin. 2008. \r\nEvolution of millennial-scale climate variability during \r\nthe mid-Pleistocene. \r\nPaleoceanography, 23, PA3216, doi:10.1029/2007PA001584. \r\n","edition":null,"identifier":{"id":"10.1029/2007PA001584","type":"doi","url":"http://dx.doi.org/10.1029/2007PA001584"},"issue":null,"journal":"Paleoceanography","pages":null,"pubRank":"1","pubYear":2008,"reportNumber":null,"title":"Evolution of millennial-scale climate variability during  the mid-Pleistocene","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"52347","geo":{"geoType":"Feature","geometry":{"coordinates":["31.69","-75.43"],"type":"POINT"},"properties":{"easternmostLongitude":"-75.43","maxElevationMeters":"-2996","minElevationMeters":"-2996","northernmostLatitude":"31.69","southernmostLatitude":"31.69","westernmostLongitude":"-75.43"}},"locationName":"Ocean>Atlantic Ocean>North Atlantic Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"20252","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/weirauch2008/weirauch2008.txt","linkText":"weirauch2008.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":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>planktic foraminifer>Globigerinoides sp.>Globigerinoides ruber>Globigerinoides ruber white","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/weirauch2008/weirauch2008.xls","linkText":"weirauch2008.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"ODP1058","dataTableNotes":null,"earliestYear":1350400,"earliestYearBP":1350400,"earliestYearCE":-1348450,"mostRecentYear":411000,"mostRecentYearBP":411000,"mostRecentYearCE":-409050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP 1058"}],"studyCode":null,"studyName":"Subtropical NW Atlantic ODP1058 Mid-Pleistocene G. ruber d18O Data","studyNotes":"The data set summarizes Globigerinoides ruber d18O data from \nSite 1058 spanning Marine Isotope Stages 12-42 (410-1350 Ka). \nNote that G. ruber between 56.30 and 85.13 mcd were published \nby Billups et al. 2006.  \n","version":"1.0","xmlId":"10037"}