EPICA Dome C Ice Core 800KYr Dust Flux Data at 25yr Resolution Lambert, F.; Bigler, M.; Steffensen, J.P.; Hutterli, M.A.; Fischer, H. Lambert, F. Bigler, M. Steffensen, J.P. Hutterli, M.A. Fischer, H. westerlies earth science/paleoclimate/ice cores (ice age,null,null,calendar kiloyear before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (dust,bulk ice,null,milligram per square meter per year,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core (EPICA Dome C>LATITUDE -75.1>LONGITUDE 123.4) Ice core data from Antarctica provide detailed insights into the characteristics of past climate, atmospheric circulation, as well as changes in the aerosol load of the atmosphere. We present high-resolution records of soluble calcium (Ca2+), non-sea-salt soluble calcium (nssCa2+), and particulate mineral dust aerosol from the East Antarctic Plateau at a depth resolution of 1 cm, spanning the past 800 000 years. Despite the fact that all three parameters are largely dust-derived, the ratio of nssCa2+ to particulate dust is dependent on the particulate dust concentration itself. We used principal component analysis to extract the joint climatic signal and produce a common high-resolution record of dust flux. This new record is used to identify Antarctic warming events during the past eight glacial periods. The phasing of dust flux and CO2 changes during glacial-interglacial transitions reveals that iron fertilization of the Southern Ocean during the past nine glacial terminations was not the dominant factor in the deglacial rise of CO2 concentrations. Rapid changes in dust flux during glacial terminations and Antarctic warming events point to a rapid response of the southern westerly wind belt in the region of southern South American dust sources on changing climate conditions. The clear lead of these dust changes on temperature rise suggests that an atmospheric reorganization occurred in the Southern Hemisphere before the Southern Ocean warmed significantly. STUDY NOTES: Dust record from the EPICA (European Project for Ice Coring in Antarctica) Dome C ice core covering 0 to 800 kyr BP. Measurements of dust mass concentration and Fine Particle Percentage using both laser and Coulter Counter methods. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lambert, F. Investigator : Bigler, M. Investigator : Steffensen, J.P. Investigator : Hutterli, M.A. Investigator : Fischer, H. 2012-03-25 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/12882 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2012dust.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2012dust.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2012dust.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2012dust.txt English https://www.ncdc.noaa.gov/paleo/study/12882 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2012dust.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2012dust.txt Lambert, F., M. Bigler, J.P. Steffensen, M. Hutterli, and H. Fischer. 2012. Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica. Climate of the Past, Vol. 8, pp. 609-623. doi:10.5194/cp-8-609-2012. http://www.clim-past.net/8/609/2012/cp-8-609-2012.html START YEAR: 801425 cal yr BP * END YEAR: 375 cal yr BP 123.4 -75.1 123.4 -75.1