{"NOAAStudyId":"6071","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":"2008-03-01","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-6071.xml","doi":null,"earliestYearBP":439,"earliestYearCE":1511,"entryId":"noaa-lake-6071","funding":[],"investigators":"Garcin, Y.; Williamson, D.; Bergonzini, L.; Radakovitch, O.; Vincens, A.; Buchet, G.; Guiot, J.; Mathe, P.-E.; Majule, A.; Brewer, S.","mostRecentYearBP":-52,"mostRecentYearCE":2002,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/6071","originalSource":null,"publication":[{"abstract":"The Masoko crater-lake in southern Tanzania provides a continuous record of environmental changes covering the last 500 years. Multi-proxy studies were performed on a 52 cm sediment core retrieved from the deepest part of the lake. Magnetic, organic carbon, geochemical proxies and pollen assemblages indicate a dry climate during the 'Little Ice Age' (AD 1550ŋ1850), confirming that the LIA in eastern Africa resulted in marked and synchronous hydrological changes.  However, the direction of response varies between different African lakes (low versus high lake-levels), indicating strong regional contrasts that prevent the clear identification of climate trends over eastern Africa at this time. Inferred changes in Masoko lake-levels closely resemble the record of solar activity cycles, indicating a possible control of solar activity on the climate in this area. This observation supports previous results from East African lakes, and extends this relationship southward. Finally, anthropogenic impact is observed in the Masoko sediments during the last 60 years, suggesting that human disturbance significantly affected this remote basin during colonial and post-colonial times.","author":null,"citation":"Garcin, Y.,Williamson, D.,Bergonzini, L.,Radakovitch, O.,Vincens, A.,Buchet, G.,Guiot, J.,Mathe, P.-E.,Majule, A.,Brewer, S. 2007. Solar and anthropogenic imprints on Lake Masoko (southern Tanzania) during the last 500 years. Journal of Paleolimnology, Vol. 37, pp. 475-490","edition":null,"identifier":null,"issue":null,"journal":"Journal of Paleolimnology","pages":null,"pubRank":"1","pubYear":null,"reportNumber":null,"title":null,"type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19891","geo":{"geoType":"Feature","geometry":{"coordinates":["-9.3333","33.755"],"type":"POINT"},"properties":{"easternmostLongitude":"33.755","maxElevationMeters":"840","minElevationMeters":"840","northernmostLatitude":"-9.3333","southernmostLatitude":"-9.3333","westernmostLongitude":"33.755"}},"locationName":"Continent>Africa>Eastern Africa>Tanzania","mappable":"Y","paleoData":[{"NOAADataTableId":"8111","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/masoko2007.txt","linkText":"masoko2007.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":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"cubic meter per kilogram","cvWhat":"magnetic property>magnetic moments>magnetic susceptibility>mass magnetic susceptibility"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>silicon/titanium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>aluminum/titanium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>niobium/titanium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"inductively-coupled plasma atomic emission spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>iron/titanium"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"loss on ignition","cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"biological material>bulk biological material>organic matter"},{"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":"percent","cvWhat":"chemical composition>element or single-element molecule>nitrogen"},{"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":"percent","cvWhat":"chemical composition>element or single-element molecule>carbon>organic carbon"},{"cvAdditionalInfo":"total organic carbon/total nitrogen","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"elemental analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>carbon/nitrogen"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/masoko2007.xls","linkText":"masoko2007.xls","urlDescription":"Data","variables":[]}],"dataTableName":"Lake Masoko MASOKO Geochem","dataTableNotes":null,"earliestYear":439,"earliestYearBP":439,"earliestYearCE":1511,"mostRecentYear":-52,"mostRecentYearBP":-52,"mostRecentYearCE":2002,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Lake Masoko"}],"studyCode":null,"studyName":"Lake Masoko, Tanzania 500 Year Geochemical Data","studyNotes":"The multiproxy study performed on Lake Masoko, Tanzania core MKJ-03-II  shows several marked changes in the sedimentary content, which are interpreted in term of lake-level, climatic changes and anthropogenic disturbances.","version":"1.0","xmlId":"645"}