{"NOAAStudyId":"6206","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":"2008-12-01","dataPublisher":"NOAA","dataType":"PALEOLIMNOLOGY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/lake","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-6206.xml","doi":null,"earliestYearBP":59450,"earliestYearCE":-57500,"entryId":"noaa-lake-6206","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"ATM 0223920, BIO 0383765, EAR 0639474"}],"investigators":"Tierney, J.E.; Russell, J.M.; Huang, Y.; Sinninghe Damste, J.S.; Hopmans, E.C.; Cohen, A.S.","mostRecentYearBP":1350,"mostRecentYearCE":600,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/6206","originalSource":null,"publication":[{"abstract":"The processes that control climate in the tropics are poorly understood. \r\nWe applied compound-specific hydrogen isotopes (dD) and the TEX86 \r\n(tetraether index of 86 carbon atoms) temperature proxy to sediment \r\ncores from Lake Tanganyika to independently reconstruct precipitation \r\nand temperature variations during the past 60,000 years. Tanganyika \r\ntemperatures follow Northern Hemisphere insolation and indicate that \r\nwarming in tropical southeast Africa during the last glacial termination \r\nbegan to increase ~3000 years before atmospheric carbon dioxide \r\nconcentrations. dD data show that this region experienced abrupt changes \r\nin hydrology coeval with orbital and millennial-scale events recorded in \r\nNorthern Hemisphere monsoonal climate records. This implies that \r\nprecipitation in tropical southeast Africa is more strongly controlled \r\nby changes in Indian Ocean sea surface temperatures and the winter \r\nIndian monsoon than by migration of the Intertropical Convergence Zone.\r\n","author":null,"citation":"Tierney, J.E., J.M. Russell, Y. Huang, J.S. Sinninghe Damsté, \r\nE.C. Hopmans, and A.S. Cohen. 2008.  \r\nNorthern Hemisphere Controls on Tropical Southeast African \r\nClimate During the Past 60,000 Years.\r\nScience, Vol. 322, No. 5899, pp. 252-255, 10 October 2008.  \r\ndoi: 10.1126/science.1160485","edition":null,"identifier":{"id":"10.1126/science.1160485","type":"doi","url":"http://dx.doi.org/10.1126/science.1160485"},"issue":null,"journal":"Science","pages":null,"pubRank":"1","pubYear":2008,"reportNumber":null,"title":"Northern Hemisphere Controls on Tropical Southeast African  Climate During the Past 60,000 Years","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Air Temperature Reconstruction","PAGES 2k Network","PAGES Africa 2k"],"site":[{"NOAASiteId":"19880","geo":{"geoType":"Feature","geometry":{"coordinates":["-6.71378","29.832616"],"type":"POINT"},"properties":{"easternmostLongitude":"29.832616","maxElevationMeters":"773","minElevationMeters":"773","northernmostLatitude":"-6.71378","southernmostLatitude":"-6.71378","westernmostLongitude":"29.832616"}},"locationName":"Continent>Africa>Eastern Africa>Lake Tanganyika","mappable":"Y","paleoData":[{"NOAADataTableId":"9528","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2008.txt","linkText":"tanganyika2008.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":"TEX86 method of Tierney (2010)","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>organic compound index>glycerol dialkyl glycerol tetraether index","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>lake water temperature>lake surface temperature"},{"cvAdditionalInfo":"TEX86 method of Powers (2005)","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>organic compound index>glycerol dialkyl glycerol tetraether index","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree Celsius","cvWhat":"earth system variable>temperature variable>temperature>lake water temperature>lake surface temperature"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>fatty acid>n-alkanoic acid>C28 n-alkanoic acid","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>fatty acid>n-alkanoic acid>C28 n-alkanoic acid","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":"corrected for biosynthetic fractionation and global ice volume","cvDataType":"PALEOLIMNOLOGY","cvDetail":"corrected","cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>fatty acid>n-alkanoic acid>C28 n-alkanoic acid","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":"corrected for global ice volume","cvDataType":"PALEOLIMNOLOGY","cvDetail":"corrected","cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>fatty acid>n-alkanoic acid>C28 n-alkanoic acid","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>compound>organic compound>organic compound index>tetraether index of 86 carbon atoms"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>compound>organic compound>organic compound index>branched and isoprenoid tetraether index"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2008.xls","linkText":"tanganyika2008.xls","urlDescription":"Data","variables":[]}],"dataTableName":"NP04-KH3 TEX86 and dD","dataTableNotes":null,"earliestYear":59450,"earliestYearBP":59450,"earliestYearCE":-57500,"mostRecentYear":1350,"mostRecentYearBP":1350,"mostRecentYearCE":600,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Lake Tanganyika Core NP04-KH3"}],"studyCode":null,"studyName":"Lake Tanganyika 60,000 Year TEX86 LST and dD Data","studyNotes":"This dataset includes TEX86 and compound-specific D/H data from \nLake Tanganyika cores KH3 and KH4. The TEX86 temperature data \nare provided with both the original Powers et al. 2005 calibration \nand the new Tierney et al. (2010) calibration. \n\nChronology was constrained by 26 radiocarbon dates on KH3 \nand 7 additional dates on KH4. The TEX86 data files include \nthe TEX86 index value, calibration to temperature utilizing the \nlakes calibrations of Powers et al., 2005, and Tierney et al. 2010,   \nand the Branched and Isoprenoid Tetraether (BIT) index value. \nThe BIT index, ranging from 0-1, is an indicator of the relative\namount of soil-derived vs. aquatic GDGTs, with a value of 0 \nindicative of completely aquatic sources, and 1 indicating \ncompletely soil-derived sources (Hopmans et al. 2004).\nThe data for KH4 also includes the modified TEX temperatures \n(T +0.5º) to account for site offset. D/H values were measured on \nthe C28 n-acid and are expressed in per mil vs. VSMOW. The carbon \nisotopes were also measured on the C-28 fatty acid expressed in \nper mil vs. VPDB. \n\nTwo corrections have been applied to the dD data. \"dDIVonly\" refers \nto the D/H data corrected for global ice volume, and \"dDIVandbio\" \nrefers to the D/H data corrected for biosynthetic fractionation \nand global ice volume. These corrections are described in the \nTierney et al. QSR 2010 paper.   \n\n\nData from cores NP04-KH04-3A-1K (KH3) and NP04-KH04-4A-1K (KH4), \nKalya Horst, Lake Tanganyika.  \nCore (KH3): 6º42.827'S, 29º49.957'E, 773m elev, 644m depth.\nCore (KH4): 6º36.101'S, 30º00.696'E, 773m elev, 349m depth.\n\n","version":"1.0","xmlId":"2162"}