{"NOAAStudyId":"8658","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":"2009-09-01","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-8658.xml","doi":null,"earliestYearBP":3702,"earliestYearCE":-1752,"entryId":"noaa-lake-8658","funding":[],"investigators":"Stager, J.C.; Cocquyt, C.; Bonnefille, R.; Weyhenmeyer, C.; Bowerman, N.","mostRecentYearBP":-18,"mostRecentYearCE":1968,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/8658","originalSource":null,"publication":[{"abstract":"A nearshore core (LT03-05) from the north basin of Lake Tanganyika provides diatom, pollen, and sedimentary time series covering the last ca. 3800 yr at 15-36 yr resolution. A chronology supported by 21 AMS dates on terrestrial and lacustrine materials allows us to account for ancient carbon effects on 14C ages and to propose refinements of the region's climatic history. Conditions drier than those of today were followed after ca. 3.30 ka by an overall wetting trend. Several century-scale climate variations were superimposed upon that trend, with exceptionally rainy conditions occurring 1.70ŋ1.40 ka, 1.15ŋ0.90 ka, 0.70ŋ0.55 ka, and 0.35ŋ0.20 ka. Around 0.55ŋ0.35 ka, during the Spörer sunspot minimum, drier conditions developed in the northern Tanganyika basin while more humid conditions were registered at Lakes Victoria and Naivasha. This indicates significant variability in the nature and distribution of near-equatorial rainfall anomalies during much of the Little Ice Age.","author":null,"citation":"Stager, J.C., Cocquyt, C., Bonnefille, R., Weyhenmeyer, C., Bowerman, N. 2009. A late Holocene paleoclimatic history of Lake Tanganyika, East Africa. Quaternary Research, 72, 47-56.","edition":null,"identifier":null,"issue":null,"journal":"Quaternary Research","pages":null,"pubRank":"1","pubYear":2009,"reportNumber":null,"title":"A late Holocene paleoclimatic history of Lake Tanganyika, East Africa","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":null,"site":[{"NOAASiteId":"9538","geo":{"geoType":"Feature","geometry":{"coordinates":["-6.03","28.53"],"type":"POINT"},"properties":{"easternmostLongitude":"28.53","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"-6.03","southernmostLatitude":"-6.03","westernmostLongitude":"28.53"}},"locationName":"Continent>Africa>Eastern Africa>Lake Tanganyika","mappable":"Y","paleoData":[{"NOAADataTableId":"12533","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2009.txt","linkText":"tanganyika2009.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":"calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>biological assemblage>diatom assemblage","cvMethod":"regression analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"microsiemens per centimeter","cvWhat":"electrical property>electrical conductivity"},{"cvAdditionalInfo":"calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>lake water","cvMethod":"regression analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"microsiemens per centimeter","cvWhat":"electrical property>electrical conductivity"},{"cvAdditionalInfo":"log microsiemens per centimeter; calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>biological assemblage>diatom assemblage","cvMethod":"regression analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"microsiemens per centimeter","cvWhat":"electrical property>electrical conductivity"},{"cvAdditionalInfo":"log microsiemens per centimeter; calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>lake water","cvMethod":"regression analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"microsiemens per centimeter","cvWhat":"electrical property>electrical conductivity"},{"cvAdditionalInfo":"log microsiemens per centimeter; calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":"unspecified margin of error","cvFormat":"Numeric","cvMaterial":"reconstruction material>biological assemblage>diatom assemblage","cvMethod":"regression analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"microsiemens per centimeter","cvWhat":"electrical property>electrical conductivity"},{"cvAdditionalInfo":"log microsiemens per centimeter; calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking","cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":"unspecified margin of error","cvFormat":"Numeric","cvMaterial":"hydrologic material>lake water","cvMethod":"regression analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"microsiemens per centimeter","cvWhat":"electrical property>electrical conductivity"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>reconstruction"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2009.xls","linkText":"tanganyika2009.xls","urlDescription":"Data","variables":[]}],"dataTableName":"LAKETAN1 conductivity","dataTableNotes":null,"earliestYear":3702,"earliestYearBP":3702,"earliestYearCE":-1752,"mostRecentYear":-18,"mostRecentYearBP":-18,"mostRecentYearCE":1968,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Lake Tanganyika"}],"studyCode":null,"studyName":"Lake Tanganyika Late Holocene Diatom-inferred Conductivity Data","studyNotes":"Transfer function analysis of the LT03-05 diatom record produced a \nreconstruction of lake water conductivity that is believed to represent \nrainfall-driven dilution of the lake surface (lower conductivity = more \nrainfall/less evaporation/more river discharge into the lake).","version":"1.0","xmlId":"2278"}