noaa-ocean-22930 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. Foraminifer trace element data and experimental seawater properties from culture experiments on O. universa grown in "Paleocene" seawater chemistry 2017-10-23 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22930 Investigator L.L. Haynes Investigator B. Hönisch Investigator K.A. Dyez Investigator K. Holland Investigator Y. Rosenthal Investigator C.R. Fish Investigator A.V. Subhas Investigator J.W.B. Rae 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 trace metals in carbonates geoscientificInformation Complete -80 90 -180 180 Geographic Region Global Ocean Global Ocean>LATITUDE >LONGITUDE None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. 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Boulder CO 80305-3328 USA online ASCII Haynes, L.L., B. Hönisch, K.A. Dyez, K. Holland, Y. Rosenthal, C.R. Fish, A.V. Subhas, and J.W.B. Rae 2017 Paleoceanography 32 580-599 10.1002/2016PA003069

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

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/haynes2017/haynes2017-calib.txt NOAA Template File; O. universa Calibration Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11