{"NOAAStudyId":"2619","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":"2005-07-01","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-2619.xml","doi":null,"earliestYearBP":1685,"earliestYearCE":265,"entryId":"noaa-ocean-2619","funding":[],"investigators":"de Garidel-Thoron, T.; Rosenthal, Y.; Bassinot, F.C.; Beaufort, L.","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/2619","originalSource":null,"publication":[{"abstract":"About 850,000 years ago, the period of the glacial cycles changedfrom 41,000 to 100,000 years. This mid-Pleistocene climate transition has been attributed to global cooling, possibly causedby a decrease in atmospheric carbon dioxide concentrations. However, evidence for such cooling is currently restricted to thecool upwelling regions in the eastern equatorial oceans, although the tropical warm pools on the western side of the ocean basins are particularly sensitive to changes in radiativeforcing. Here we present high-resolution records of sea surface temperatures spanning the past 1.75 million years, obtained from oxygen isotopes and Mg/Ca ratios in planktonic foraminifera from the western Pacific warm pool. In contrast with the eastern equatorial regions, sea surface temperatures in the westernPacific warm pool are relatively stable throughout the Pleistocene epoch, implying little long-term change in the tropical net radiation budget. Our results challenge the hypothesis of a gradual decrease in atmospheric carbon dioxide concentrationsas a dominant trigger of the longer glacial cycles since 850,000 years ago. Instead, we infer that the temperature contrast across the equatorial Pacific Ocean increased, which might have had a significant influence on the mid-Pleistocene climate transition.","author":null,"citation":"de Garidel-Thoron, T., Y. Rosenthal, F.C. Bassinot, and L. Beaufort. 2005.  Stable sea surface temperatures in the western Pacific warm pool over the past 1.75 million years.  Nature 433, No.7023, 294-298.","edition":null,"identifier":null,"issue":null,"journal":"Nature","pages":null,"pubRank":"1","pubYear":2005,"reportNumber":null,"title":"Stable sea surface temperatures in the western Pacific warm pool over the past 1.75 million years","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Sea Surface Temperature Reconstruction"],"site":[{"NOAASiteId":"19248","geo":{"geoType":"Feature","geometry":{"coordinates":["2.03","141.77"],"type":"POINT"},"properties":{"easternmostLongitude":"141.77","maxElevationMeters":"-2547","minElevationMeters":"-2547","northernmostLatitude":"2.03","southernmostLatitude":"2.03","westernmostLongitude":"141.77"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"4308","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>trace metals in carbonates","earth science>paleoclimate>paleocean>reconstruction","earth science>paleoclimate>paleocean>other","earth science>paleoclimate>paleocean>age control"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/degaridel-thoron2005","linkText":"degaridel-thoron2005","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>other","earth science>paleoclimate>paleocean>age control","earth science>paleoclimate>paleocean>oxygen isotopes","earth science>paleoclimate>paleocean>trace metals in carbonates","earth science>paleoclimate>paleocean>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/md972140-tab.txt","linkText":"md972140-tab.txt","urlDescription":"Alternate Format Data","variables":[{"cvAdditionalInfo":"\"Globigerinoides ruber, white, 250-300mm\"","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>element or compound ratio>magnesium/calcium","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>sea water temperature>sea surface temperature"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"radiocarbon year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":"composited","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":"biological material>organism>foraminifer>planktic foraminifer>Globigerinoides sp.>Globigerinoides ruber>Globigerinoides ruber pink","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":"biological material>organism>foraminifer>planktic foraminifer>Globigerinoides sp.>Globigerinoides ruber","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>magnesium/calcium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"}]}],"dataTableName":"MD97-2140","dataTableNotes":"This dataset is a high-resolution Pleistocene record (0-1.75Myr ago, Marine Isotopic Stages Marine Isotopic Stage 1 to MIS 59) of paired d18O and Mg/Ca measurements in planktonic foraminifera (Globigerinoides ruber, 250-300mm, white) from the IMAGES core ","earliestYear":1755,"earliestYearBP":1685,"earliestYearCE":265,"mostRecentYear":6,"mostRecentYearBP":0,"mostRecentYearCE":1950,"species":[],"timeUnit":"14C yr BP"}],"siteName":"MD97-2140"}],"studyCode":null,"studyName":"Western Pacific Warm Pool Pleistocene paired d18O-Mg/Ca and SST Reconstruction","studyNotes":"","version":"1.0","xmlId":"1690"}