Equatorial Pacific Sediment Composition and Radionuclide Data Bradtmiller, L.I.; Anderson, R.F.; Fleisher, M.Q.; Burckle, L.H. Bradtmiller, L.I. Anderson, R.F. Fleisher, M.Q. Burckle, L.H. earth science/paleoclimate/paleoceanography (biogenic silica,sediment,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,238th mass flux) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,244th mass flux) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,247th mass flux) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,245th mass flux) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,240th mass flux) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,241st mass flux) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,242nd mass flux) earth science/paleoclimate/paleoceanography (231Pa,sediment,unspecified margin of error,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,radiocarbon ages) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,246th mass flux) earth science/paleoclimate/paleoceanography (231Pa/230Th excess,sediment,null,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (234U,sediment,unspecified margin of error,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (230Th,sediment,unspecified margin of error,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (230Th excess,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (232Th,sediment,unspecified margin of error,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,239th mass flux) earth science/paleoclimate/paleoceanography (230Th,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,unspecified margin of error,radiocarbon year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (234U,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (calcium carbonate,sediment,null,weight percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,243rd mass flux) earth science/paleoclimate/paleoceanography (231Pa,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (238U,sediment,unspecified margin of error,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (230Th,sediment,null,gram per square centimeter per kiloyear,null,paleoceanography,null,null,N,237th mass flux) earth science/paleoclimate/paleoceanography (231Pa excess,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (232Th,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (238U,sediment,null,disintegration per minute per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (RC11-238>LATITUDE -1.52>LONGITUDE -85.82) (TT013-PC18>LATITUDE -1.83>LONGITUDE -139.7) (MW91-9 GGC48>LATITUDE 0>LONGITUDE 161) (TT013-PC72>LATITUDE .1>LONGITUDE -139.4) (V19-30>LATITUDE -3>LONGITUDE -83) (V21-40>LATITUDE -5.52>LONGITUDE -106.77) (RC13-114>LATITUDE -1.65>LONGITUDE -103.63) (RC17-177>LATITUDE 2>LONGITUDE 159) (V28-203>LATITUDE .95>LONGITUDE -179.42) (MD97-2138>LATITUDE -1.25>LONGITUDE 146.23) (RC13-140>LATITUDE -2.87>LONGITUDE -87.75) The silicic acid leakage hypothesis (SALH) suggests that during glacial periods, unused silicic acid escaped the Southern Ocean into the equatorial oceans, causing an ecological shift favoring diatoms relative to coccolithophorids and a drawdown of CO2. The 230Th normalized opal fluxes and 231Pa/230Th ratios were measured in eleven equatorial Pacific cores to reconstruct diatom productivity over the past 30 kyr and to test the SALH. Holocene spatial patterns of opal flux are strongly correlated with 231Pa/230Th ratios and with satellite estimates of primary productivity. Down-core opal flux records do not support the SALH but show Holocene opal burial to exceed that of the late glacial period by 35%, or 2.8 Gt opal/kyr, across the equatorial Pacific. This suggests that the SALH may not account for lower atmospheric CO2 levels during the late glacial. However, the data do support results from previous studies that invoke increased El Niņoŋlike conditions during this time. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bradtmiller, L.I. Investigator : Anderson, R.F. Investigator : Fleisher, M.Q. Investigator : Burckle, L.H. 2006-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/6420 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v19-30lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r13140lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-40lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/rc13-114-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/tpc18-lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r11238lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m9-ggc48-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r17177lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m97-2138-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/tpc72-lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v28203lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bradtmiller2006 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v19-30lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r13140lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-40lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/rc13-114-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/tpc18-lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r11238lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m9-ggc48-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r17177lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m97-2138-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/tpc72-lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v28203lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bradtmiller2006 English https://www.ncdc.noaa.gov/paleo/study/6420 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v19-30lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r13140lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-40lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/rc13-114-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/tpc18-lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r11238lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m9-ggc48-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r17177lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m97-2138-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/tpc72-lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v28203lb-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bradtmiller2006 Bradtmiller, L.I., R.F. Anderson, M.Q. Fleisher, and L.H. Burckle. 2006. Diatom productivity in the equatorial Pacific Ocean from the last glacial period to the present: A test of the silicic acid leakage hypothesis. Paleoceanography, 21, PA4201. START YEAR: 475800 cal yr BP * END YEAR: 0 cal yr BP -179.42 -5.52 161 2