Lake Tanganyika Late Holocene Diatom-inferred Conductivity Data Stager, J.C.; Cocquyt, C.; Bonnefille, R.; Weyhenmeyer, C.; Bowerman, N. Stager, J.C. Cocquyt, C. Bonnefille, R. Weyhenmeyer, C. Bowerman, N. earth science/paleoclimate/climate reconstructions|paleolimnology (electrical conductivity,diatom assemblage|lake water,null,microsiemens per centimeter,null,climate reconstructions|paleolimnology,null,regression analysis,N,calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking) earth science/paleoclimate/climate reconstructions|paleolimnology (electrical conductivity,diatom assemblage|lake water,null,microsiemens per centimeter,null,climate reconstructions|paleolimnology,null,regression analysis,N,log microsiemens per centimeter; calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking) earth science/paleoclimate/climate reconstructions|paleolimnology (electrical conductivity,diatom assemblage|lake water,unspecified margin of error,microsiemens per centimeter,null,climate reconstructions|paleolimnology,null,regression analysis,N,log microsiemens per centimeter; calibration data set: European Diatom Database Gasse et al. 1995; reconstruction technique: Weighted averaging regression with inverse de-shrinking) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (Lake Tanganyika>LATITUDE -6.03>LONGITUDE 28.53) 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. STUDY NOTES: Transfer function analysis of the LT03-05 diatom record produced a reconstruction of lake water conductivity that is believed to represent rainfall-driven dilution of the lake surface (lower conductivity = more rainfall/less evaporation/more river discharge into the lake). NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Stager, J.C. Investigator : Cocquyt, C. Investigator : Bonnefille, R. Investigator : Weyhenmeyer, C. Investigator : Bowerman, N. 2009-09-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/8658 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2009.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2009.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2009.txt English https://www.ncdc.noaa.gov/paleo/study/8658 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2009.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/tanganyika2009.txt 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. START YEAR: 3702 cal yr BP * END YEAR: -18 cal yr BP 28.53 -6.03 28.53 -6.03