Lake Malawi 25,000 Year Biogenic Silica and Mass Accumulation Rate Data Johnson, T.C.; Brown, E.T.; McManus, J.F.; Barry, S.L.; Barker, P. Johnson, T.C. Brown, E.T. McManus, J.F. Barry, S.L. Barker, P. earth science/paleoclimate/paleolimnology (notes,null,null,null,null,paleolimnology,null,null,C,sediment texture) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (porosity,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (accumulation rate,sediment,null,gram per square centimeter per year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (biogenic silica,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (sedimentation rate,sediment,null,centimeter per year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (biogenic silica,sediment,null,milligram per square centimeter per year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Lake Malawi, core M98-1P>LATITUDE -10.265>LONGITUDE 34.3183) (Lake Malawi, core M98-2P>LATITUDE -9.97667>LONGITUDE 34.23) High-resolution profiles of the mass accumulation rate of biogenic silica and other geochemical proxies in two piston cores from northern Lake Malawi provide a climate signal for this part of tropical Africa spanning the past 25,000 years. The biogenic silica mass accumulation rate was low during the relatively dry late Pleistocene, when the river flux of silica to the lake was suppressed. Millennial-scale fluctuations, due to upwelling intensity, in the late Pleistocene climate of the Lake Malawi basin appear to have been closely linked to the Northern Hemisphere climate until 11 thousand years ago. Relatively cold conditions in the Northern Hemisphere coincided with more frequent north winds over the Malawi basin, perhaps resulting from a more southward migration of the Intertropical Convergence Zone. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Johnson, T.C. Investigator : Brown, E.T. Investigator : McManus, J.F. Investigator : Barry, S.L. Investigator : Barker, P. 2003-02-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5456 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/malawi_2002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/malawi_2002.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/malawi_2002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/malawi_2002.xls English https://www.ncdc.noaa.gov/paleo/study/5456 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/malawi_2002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/malawi_2002.xls Johnson, T.C., E.T. Brown, J.F. McManus, S.L. Barry, P. Barker. 2002. A high resolution paleoclimate record spanning the past 25,000 years in southern East Africa. Science Vol. 296, pp. 113-114 START YEAR: 24308 cal yr BP * END YEAR: 155 cal yr BP 34.23 -10.265 34.3183 -9.97667