{"NOAAStudyId":"6051","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":"2008-02-01","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-6051.xml","doi":null,"earliestYearBP":18355,"earliestYearCE":-16405,"entryId":"noaa-lake-6051","funding":[],"investigators":"Tierney, J.E.; Russell, J.M.","mostRecentYearBP":10360,"mostRecentYearCE":-8410,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/6051","originalSource":null,"publication":[{"abstract":"The timing and magnitude of abrupt climate change in tropical Africa during the last glacial termination remains poorly understood. High-resolution paleolimnological data from Lake Tanganyika, Southeast Africa show that wind-driven seasonal mixing in the lake was reduced during the Younger Dryas, Inter-Allerød Cool Period, Older Dryas, and Heinrich Event 1, suggesting a weakened southwestIndian monsoon and a more southerly position of the Inter-Tropical Convergence Zone over Africa during these intervals. These events in Lake Tanganyika, coeval with millennial and centennial-scale climate shifts in the high latitudes, suggest that changes in ITCZ location and Indian monsoon strength are important components of abrupt global climate change and that their effects are felt south of the equator in Africa. However, we observe additional events in Lake Tanganyika of equal magnitude that are not correlated with high-latitude changes, indicating the potential for abrupt climate change to originate from within tropical systems.","author":null,"citation":"Tierney, J.E.,Russell, J.M. 2007. Abrupt climate change in southeast tropical Africa influenced by Indian monsoon variability and ITCZ migration. Geophys. Res. Lett., 34, L15709.","edition":null,"identifier":null,"issue":null,"journal":"Geophysical Research Letters","pages":null,"pubRank":"1","pubYear":2007,"reportNumber":null,"title":"Abrupt climate change in southeast tropical Africa influenced by Indian monsoon variability and ITCZ migration","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"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":"8070","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2007.txt","linkText":"tanganyika2007.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"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"},{"cvAdditionalInfo":"method of Mortlock and Froelich 1989","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"spectrophotometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide>biogenic silica"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"elemental analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>carbon>organic carbon"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2007.xls","linkText":"tanganyika2007.xls","urlDescription":"Data","variables":[]}],"dataTableName":"NP04-KH3 Silica and TOC","dataTableNotes":null,"earliestYear":18355,"earliestYearBP":18355,"earliestYearCE":-16405,"mostRecentYear":10360,"mostRecentYearBP":10360,"mostRecentYearCE":-8410,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Lake Tanganyika Core NP04-KH3"}],"studyCode":null,"studyName":"Lake Tanganyika Deglacial Biogenic Silica and TOC Data","studyNotes":"This dataset includes biogenic silica and total organic carbon \nas measured on core NP04-KH3 from Lake Tanganyika, spanning \nthe time interval coincident with the last deglaciation. \nChronology for the core was established by C14-AMS dating.","version":"1.0","xmlId":"635"}