{"NOAAStudyId":"19564","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":"2015-12-11","dataPublisher":"NOAA","dataType":"CLIMATE RECONSTRUCTIONS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/climate-reconstruction","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-recon-19564.xml","doi":null,"earliestYearBP":5300000,"earliestYearCE":-5298050,"entryId":"noaa-recon-19564","funding":[],"investigators":"de Boer, B.; Lourens, L.J.; van de Wal, R.S.W.","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/19564","originalSource":null,"publication":[{"abstract":"Marine sediment records from the Oligocene and Miocene reveal clear 400,000-year climate cycles related to variations in orbital eccentricity. These cycles are also observed in the Plio-Pleistocene records of the global carbon cycle. However, they are absent from the Late Pleistocene ice-age record over the past 1.5 million years. Here we present a simulation of global ice volume over the past 5 million years with a coupled system of four three-dimensional ice-sheet models. Our simulation shows that the 400,000-year long eccentricity cycles of Antarctica vary coherently with d13C data during the Pleistocene, suggesting that they drove the long-term carbon cycle changes throughout the past 35 million years. The 400,000-year response of Antarctica was eventually suppressed by the dominant 100,000-year glacial cycles of the large ice sheets in the Northern Hemisphere. \r\n","author":{"name":"B. de Boer,\tLucas J. Lourens, and Roderik S.W. van de Wal"},"citation":"B. de Boer,\tLucas J. Lourens, and Roderik S.W. van de Wal. 2014. Persistent 400,000-year variability of Antarctic ice volume and the carbon cycle is revealed throughout the Plio-Pleistocene. Nature Communications, 5(2999). doi: 10.1038/ncomms3999 ","edition":null,"identifier":{"id":"10.1038/ncomms3999 ","type":"doi","url":"http://dx.doi.org/10.1038/ncomms3999 "},"issue":"2999","journal":"Nature Communications","pages":null,"pubRank":"1","pubYear":2014,"reportNumber":null,"title":"Persistent 400,000-year variability of Antarctic ice volume and the carbon cycle is revealed throughout the Plio-Pleistocene","type":"publication","volume":"5"},{"abstract":null,"author":{"name":"B. de Boer, R.S.W. van de Wal, L.J. Lourens, R. Bintanja, T.J. Reerink"},"citation":"B. de Boer, R.S.W. van de Wal, L.J. Lourens, R. Bintanja, T.J. Reerink. 2013. A continuous simulation of global ice volume over the past 1 million years with 3-D ice-sheet models. Climate Dynamics, 41(5), 1365-1384. doi: 10.1007/s00382-012-1562-2","edition":null,"identifier":{"id":"10.1007/s00382-012-1562-2","type":"doi","url":"http://dx.doi.org/10.1007/s00382-012-1562-2"},"issue":"5","journal":"Climate Dynamics","pages":"1365-1384","pubRank":"2","pubYear":2013,"reportNumber":null,"title":"A continuous simulation of global ice volume over the past 1 million years with 3-D ice-sheet models","type":"publication","volume":"41"}],"reconstruction":"Y","scienceKeywords":["Air Temperature Reconstruction","Sea Level Reconstruction"],"site":[{"NOAASiteId":"22723","geo":{"geoType":"Feature","geometry":{"coordinates":["-90","90","-180","180"],"type":"POLYGON"},"properties":{"easternmostLongitude":"180","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"90","southernmostLatitude":"-90","westernmostLongitude":"-180"}},"locationName":"Geographic Region>Global","mappable":"N","paleoData":[{"NOAADataTableId":"30184","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>reconstructions>sea level"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/deboer2014/deboer2014.txt","linkText":"Global Sea Level, Ice Volume, Temperature, and d18Osw Reconstructions","urlDescription":"Data File","variables":[{"cvAdditionalInfo":"the ice-volume contribution to benthic d18O (relative to present day)","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":"anomalized","cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>sea water","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":"The d18O contribution of temperature relative to present day","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":"anomalized","cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>sea water","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":"Eustatic sea level - global average derived from ice-volume relative to present day","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":"anomalized","cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"earth system variable>hydrographic variable>sea level"},{"cvAdditionalInfo":"Continental mean surface-air Temperature anomaly of the Northern Hemisphere (40-80N) relative to present day","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":"anomalized","cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>air temperature>surface air temperature"},{"cvAdditionalInfo":"Total ice volume for the Eurasian Ice Sheet in meters of sea level equivalent","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"earth system variable>cryospheric variable>cryospheric quantity>ice sheet volume"},{"cvAdditionalInfo":"Total ice volume for the North American Ice Sheet in meters of sea level equivalent","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"earth system variable>cryospheric variable>cryospheric quantity>ice sheet volume"},{"cvAdditionalInfo":"Total ice volume for the Antarctic Ice Sheet in meters of sea level equivalent","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"earth system variable>cryospheric variable>cryospheric quantity>ice sheet volume"},{"cvAdditionalInfo":"Total ice volume for the Greenland Ice Sheet in meters of sea level equivalent","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"earth system variable>cryospheric variable>cryospheric quantity>ice sheet volume"},{"cvAdditionalInfo":"x1e6 units; Antarctic ice volume","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"square kilometer","cvWhat":"earth system variable>cryospheric variable>cryospheric quantity>ice sheet volume"},{"cvAdditionalInfo":"Antarctic ice discharge towards open water","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"gigaton per year","cvWhat":"earth system variable>cryospheric variable>cryospheric process>ice sheet calving"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"modelled benthic d18O data closely representing the LR04 stack (Lisiecki and Raymo 2005)","cvDataType":"PALEOCLIMATIC MODELING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>organism>foraminifer>benthic foraminifer","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"deBoer2014","dataTableNotes":null,"earliestYear":5300000,"earliestYearBP":5300000,"earliestYearCE":-5298050,"mostRecentYear":0,"mostRecentYearBP":0,"mostRecentYearCE":1950,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Global"}],"studyCode":null,"studyName":"Global 5 Million Year Sea Level, Temperature, and d18Osw Reconstructions","studyNotes":"A coupled system of four ice-sheet models with an innovative inverse modelling approach is used to reconstruct ice volume and temperature from benthic d18O data (LR04 stack)","version":"1.0","xmlId":"17296"}