Foraminifer trace element data and experimental seawater properties from culture experiments on O. universa grown in "Paleocene" seawater chemistry Haynes, L.L.; Hönisch, B.; Dyez, K.A.; Holland, K.; Rosenthal, Y.; Fish, C.R.; Subhas, A.V.; Rae, J.W.B. Haynes, L.L. Hönisch, B. Dyez, K.A. Holland, K. Rosenthal, Y. Fish, C.R. Subhas, A.V. Rae, J.W.B. earth science/paleoclimate/instrumental (salinity,sea water,null,practical salinity unit,null,instrumental,null,null,N,conductivity probe) earth science/paleoclimate/instrumental (inorganic compound index,sea water,null,dimensionless,null,instrumental,null,null,N,Borate ion/Dissolved Inorganic Carbon Ratio) earth science/paleoclimate/paleoceanography (growth rate,Orbulina universa,null,mole per square meter per second,null,paleoceanography,null,null,N,Calculated net growth rate; calculated net rate- not measured or instantaneous; units are log 10 mole per square meter per second) earth science/paleoclimate/paleoceanography (magnesium/calcium,Orbulina universa,two standard deviations,micromole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null) earth science/paleoclimate/instrumental (dissolved inorganic carbon,sea water,two standard deviations,micromole per kilogram,null,instrumental,null,null,N,Dissolved Inorganic Carbon Concentration; calculated in Co2sys.m) earth science/paleoclimate/instrumental (calcite saturation state,sea water,two standard deviations,dimensionless,null,instrumental,null,null,N,Calcite Saturation State; calculated in Co2sys.m) earth science/paleoclimate/instrumental (calcium,sea water,null,millimole per kilogram,null,instrumental,null,null,N,Total calcium concentration) earth science/paleoclimate/paleoceanography (weight,Orbulina universa,null,microgram,null,paleoceanography,null,null,N,Average foraminifer weight; Microabalance) earth science/paleoclimate/instrumental (carbonate ion,sea water,two standard deviations,micromole per kilogram,null,instrumental,null,null,N,Carbonate Ion Concentration; calculated in Co2sys.m) earth science/paleoclimate/instrumental (borate ion,sea water,two standard deviations,micromole per kilogram,null,instrumental,null,null,N,Borate Ion Concentration; calculated in Co2sys.m) earth science/paleoclimate/paleoceanography (barium/calcium,Orbulina universa,null,micromole per mole,null,paleoceanography,corrected,inductively-coupled plasma mass spectrometry,N,corrected for salinity) earth science/paleoclimate/instrumental (sea water temperature,null,null,degree Celsius,null,instrumental,null,null,N,Hobo TidBit) earth science/paleoclimate/instrumental (hydrogen carbonate,sea water,null,micromole per kilogram,null,instrumental,null,null,N,Bicarbonate Ion Concentration; calculated in Co2sys.m) earth science/paleoclimate/instrumental (hydrogen carbonate,sea water,two standard deviations,micromole per kilogram,null,instrumental,null,null,N,Bicarbonate Ion Concentration; calculated in Co2sys.m) earth science/paleoclimate/instrumental (borate ion,sea water,null,micromole per kilogram,null,instrumental,null,null,N,Borate Ion Concentration; calculated in Co2sys.m) earth science/paleoclimate/instrumental (calcite saturation state,sea water,null,dimensionless,null,instrumental,null,null,N,Calcite Saturation State; calculated in Co2sys.m) earth science/paleoclimate/instrumental (inorganic compound index,sea water,null,kilogram per mole,null,instrumental,null,null,N,Measured foram B/Ca over total seawater [B]/Dissolved Inorganic Carbon ratio (defined KD value); unsimplified units µmol/mol / µmol/kg) earth science/paleoclimate/instrumental (magnesium,sea water,null,millimole per kilogram,null,instrumental,null,null,N,Total magnesium concentration) earth science/paleoclimate/paleoceanography (diameter,Orbulina universa,null,micrometer,null,paleoceanography,null,null,N,Average foraminifer diameter; Nikon microscope) earth science/paleoclimate/paleoceanography (growth rate,Orbulina universa,one standard deviation,microgram per day,null,paleoceanography,null,null,N,Calculated net growth rate; calculated net rate- not measured or instantaneous) earth science/paleoclimate/paleoceanography (barium/calcium,Orbulina universa,null,micromole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (magnesium/calcium,Orbulina universa,null,micromole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (diameter,Orbulina universa,null,micrometer,null,paleoceanography,null,null,C,Experimental Size range; Nikon microscope) earth science/paleoclimate/paleoceanography (number of samples,Orbulina universa,null,dimensionless,null,paleoceanography,null,null,C,Number of individuals included in growth rate estimate/ total number of individuals in experiment) earth science/paleoclimate/instrumental (alkalinity,sea water,two standard deviations,micromole per kilogram,null,instrumental,null,null,N,metrohm titrator) earth science/paleoclimate/paleoceanography (growth rate,Orbulina universa,null,microgram per day,null,paleoceanography,null,null,N,Calculated net growth rate; calculated net rate- not measured or instantaneous) earth science/paleoclimate/instrumental (boron,sea water,null,micromole per kilogram,null,instrumental,null,null,N,Total boron concentraion) earth science/paleoclimate/instrumental (alkalinity,sea water,null,micromole per kilogram,null,instrumental,null,null,N,metrohm titrator) earth science/paleoclimate/instrumental (dissolved inorganic carbon,sea water,null,micromole per kilogram,null,instrumental,null,null,N,Dissolved Inorganic Carbon Concentration; calculated in Co2sys.m) earth science/paleoclimate/instrumental (pH,sea water,null,dimensionless,null,instrumental,null,null,N,metrohm titrator) earth science/paleoclimate/instrumental (pH,sea water,two standard deviations,dimensionless,null,instrumental,null,null,N,metrohm titrator) earth science/paleoclimate/instrumental (carbonate ion,sea water,null,micromole per kilogram,null,instrumental,null,null,N,Carbonate Ion Concentration; calculated in Co2sys.m) earth science/paleoclimate/instrumental (photosynthetically active radiation,null,null,micromole per square meter per second,null,instrumental,null,null,N,measured as µmol photons /m2/s) earth science/paleoclimate/paleoceanography (barium/calcium,Orbulina universa,two standard deviations,micromole per mole,null,paleoceanography,null,inductively-coupled plasma mass spectrometry,N,null) earth science/paleoclimate/paleocean (Global Ocean>LATITUDE >LONGITUDE ) The B/Ca ratio of planktic foraminiferal calcite, a proxy for the surface ocean carbonate system, displays large negative excursions during the Paleocene-Eocene Thermal Maximum (PETM, 55.9 Ma), consistent with rapid ocean acidification at that time. However, the B/Ca excursion measured at the PETM exceeds a magnitude that modern pH calibrations can explain. Numerous other controls on the proxy have been suggested, including foraminiferal growth rate and the total concentration of dissolved inorganic carbon (DIC). Here we present new calibrations for B/Ca versus the combined effects of pH and DIC in the symbiont-bearing planktic foraminifer Orbulina universa, grown in culture solutions with simulated Paleocene seawater elemental composition (high [Ca], low [Mg], and low total boron concentration ([B]T). We also investigate the isolated effects of low seawater [B]T, high [Ca], reduced symbiont photosynthetic activity, and average shell growth rate on O. universa B/Ca in order to further understand the proxy systematics and to determine other possible influences on the PETM records. We find that average shell growth rate does not appear to determine B/Ca in high calcite saturation experiments. In addition, our “Paleocene” calibration shows higher sensitivity than the modern calibration at low [B(OH)4-]/DIC. Given a large DIC pulse at the PETM, this amplification of the B/Ca response can more fully explain the PETM B/Ca excursion. However, further calibrations with other foraminifer species are needed to determine the range of foraminifer species-specific proxy sensitivities under these conditions for quantitative reconstruction of large carbon cycle perturbations. STUDY NOTES: This data set comprises the parameters and data from culture experiments in the planktic foraminifer Orbulina universa. Foraminiferal B/Ca and Mg/Ca, seawater trace element concentrations, and seawater carbonate chemistry parameters are reported. We also report estimated net lifetime growth rates, calculated from foraminiferal size, weight, and duration of life. These are not measured quantities and do not reflect instantaneous shell growth rate. Measurement precision- temperature: 0.1 degrees C, salinity: 0.1 PSU. Provided Keywords: B/Ca, Paleocene-Eocene Thermal Maximum, Orbulina universa, culture calibrations NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Haynes, L.L. Investigator : Hönisch, B. Investigator : Dyez, K.A. Investigator : Holland, K. Investigator : Rosenthal, Y. Investigator : Fish, C.R. Investigator : Subhas, A.V. Investigator : Rae, J.W.B. 2017-10-23 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22930 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/haynes2017/haynes2017-calib.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/haynes2017/haynes2017-calib.txt English https://www.ncdc.noaa.gov/paleo/study/22930 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/haynes2017/haynes2017-calib.txt Haynes, L.L., B. Hönisch, K.A. Dyez, K. Holland, Y. Rosenthal, C.R. Fish, A.V. Subhas, and J.W.B. Rae2017Calibration of the B/Ca proxy in the planktic foraminifer Orbulina universa to Paleocene seawater conditionsPaleoceanography32580-59910.1002/2016PA003069 -180 -80 180 90