{"NOAAStudyId":"5460","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":"2003-04-01","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-5460.xml","doi":null,"earliestYearBP":14375,"earliestYearCE":-12425,"entryId":"noaa-lake-5460","funding":[],"investigators":"Stager, J.C.; Cumming, B.F.; Meeker, L.D.","mostRecentYearBP":457,"mostRecentYearCE":1493,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/5460","originalSource":null,"publication":[{"abstract":"East Africa's enormous Lake Victoria dried out at the close of the last glacial, but the precise timing and origin of that drying event have not been clarified, largely because of uncertainty regarding core stratigraphy and ancient carbon effects on 14C dates from the lake. New dates and re-examination of evidence from widely distributed cores shows that desiccation occurred some time between 15 900 and 14 200 calendar years BP, and perhaps also ca. 18-17 kyr BP. These lake level minima were briefer than has been previously suggested and were synchronous with pronounced global climate disruptions including North Atlantic ice-rafting Heinrich event 1. Less severe declines occurred during the Older and Younger Dryas intervals. Dansgaard-Oeschger type cooling cycles registered in the GISP2 ice core record tracked major lake level regressions in East Africa and weakenings of Afro-Asian monsoons during the late Quaternary, possibly linking the desiccation of Lake Victoria to century-scale reductions in solar radiation output.","author":null,"citation":"Stager, J.C., B.F. Cumming, L.D. Meeker. 2002. Cooling cycles, Heinrich event 1, and the desiccation of Lake Victoria. Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 183, pp. 169-178","edition":null,"identifier":null,"issue":null,"journal":"Palaeogeography, Palaeoclimatology, Palaeoecology","pages":null,"pubRank":"1","pubYear":2002,"reportNumber":null,"title":"Cooling cycles, Heinrich event 1, and the desiccation of Lake Victoria","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"8905","geo":{"geoType":"Feature","geometry":{"coordinates":[".0833","32.8006"],"type":"POINT"},"properties":{"easternmostLongitude":"32.8006","maxElevationMeters":"1134","minElevationMeters":"1134","northernmostLatitude":"0.0833","southernmostLatitude":"0.0833","westernmostLongitude":"32.8006"}},"locationName":"Continent>Africa>Eastern Africa>Uganda","mappable":"Y","paleoData":[{"NOAADataTableId":"7223","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>population abundance"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/victoria_diatom.txt","linkText":"victoria_diatom.txt","urlDescription":"Data","variables":[{"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":"Axis #1 of diatom assemblage","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"statistical variable>multivariate eigenvector-based variable>correspondence analysis axis"},{"cvAdditionalInfo":"Axis #2 of diatom assemblage","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"statistical variable>multivariate eigenvector-based variable>correspondence analysis axis"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"}]}],"dataTableName":"core Ibis-1","dataTableNotes":null,"earliestYear":14375,"earliestYearBP":14375,"earliestYearCE":-12425,"mostRecentYear":457,"mostRecentYearBP":457,"mostRecentYearCE":1493,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Lake Victoria, Damba Channel core Ibis-1"}],"studyCode":null,"studyName":"Lake Victoria 14,000 Year Diatom Correspondence Analysis","studyNotes":"Diatom series from Lake Victoria, Uganda, core Ibis -1, Damba Channel.","version":"1.0","xmlId":"656"}