Deep-Sea Coral Global Trace Metal Data Anagnostou, E.; Sherrell, R.M.; Gagnon, A.; LaVigne, M.; Field, M.P.; McDonough, W.F. Anagnostou, E. Sherrell, R.M. Gagnon, A. LaVigne, M. Field, M.P. McDonough, W.F. earth science/paleoclimate/corals and sclerosponges (sample identification,null,null,null,null,corals and sclerosponges,null,null,C,null) earth science/paleoclimate/corals and sclerosponges (latitude,null,null,degree north,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges (longitude,null,null,degree east,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/instrumental (phosphate,sea water,null,micromole per kilogram,null,instrumental,null,null,N,hydrographic seawater phosphate concentration) earth science/paleoclimate/instrumental (notes,null,null,null,null,instrumental,null,null,C,reference of seawater phosphate data) earth science/paleoclimate/corals and sclerosponges (uranium/calcium,Desmophyllum dianthus,null,micromole per mole,null,corals and sclerosponges,null,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/corals and sclerosponges (phosphorus/calcium,Desmophyllum dianthus,one standard deviation,micromole per mole,null,corals and sclerosponges,null,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/corals and sclerosponges (barium/calcium,Desmophyllum dianthus,one standard deviation,micromole per mole,null,corals and sclerosponges,null,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/instrumental (phosphate,sea water,one standard deviation,micromole per kilogram,null,instrumental,null,null,N,null) earth science/paleoclimate/instrumental (barium,sea water,null,nanomole per kilogram,null,instrumental,null,null,N,hydrographic seawater barium concentration) earth science/paleoclimate/corals and sclerosponges (collection date,null,null,year Common Era,null,corals and sclerosponges,null,null,N,Year of coral collection) earth science/paleoclimate/corals and sclerosponges (number of samples,null,null,count,null,corals and sclerosponges,null,inductively-coupled plasma mass spectrometry|laser ablation,C,number of averaged later lines (replicate ablations)) earth science/paleoclimate/corals and sclerosponges (uranium/calcium,Desmophyllum dianthus,one standard deviation,micromole per mole,null,corals and sclerosponges,null,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/instrumental (carbonate ion,sea water,one standard deviation,micromole per kilogram,null,instrumental,null,null,N,using CO2sys) earth science/paleoclimate/instrumental (notes,null,null,null,null,instrumental,null,null,C,reference of seawater barium data) earth science/paleoclimate/instrumental (notes,null,null,null,null,instrumental,null,null,C,reference of carbonate ion data) earth science/paleoclimate/corals and sclerosponges (collection water depth,null,null,meter,null,corals and sclerosponges,null,null,N,collection depth of corals) earth science/paleoclimate/corals and sclerosponges (barium/calcium,Desmophyllum dianthus,null,micromole per mole,null,corals and sclerosponges,null,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/corals and sclerosponges (phosphorus/calcium,Desmophyllum dianthus,null,micromole per mole,null,corals and sclerosponges,null,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/instrumental (carbonate ion,sea water,null,micromole per kilogram,null,instrumental,null,null,N,hydrographic seawater carbonate ion concentration; using CO2sys) earth science/paleoclimate/corals and sclerosponges (Global>LATITUDE >LONGITUDE ) As paleoceanographic archives, deep sea coral skeletons offer the potential for high temporal resolution and precise absolute dating, but have not been fully investigated for geochemical reconstructions of past ocean conditions. Here we assess the utility of skeletal P/Ca, Ba/Ca and U/Ca in the deep sea coral D. dianthus as proxies of dissolved phosphate (remineralized at shallow depths), dissolved barium (trace element with silicate-type distribution) and carbonate ion concentrations, respectively. Measurements of these proxies in globally distributed D. dianthus specimens show clear dependence on corresponding seawater properties. Linear regression fits of mean coral Element/Ca ratios against seawater properties yield the equations: P/Cacoral (umol/mol) = (0.6 +/- 0.1) P/Casw(umol/mol) - (23 +/- 18), R2 = 0.6, n = 16 and Ba/Cacoral(umol/mol) = (1.4 +/- 0.3) Ba/Casw(umol/mol) + (0 +/- 2), R2 = 0.6, n = 17; no significant relationship is observed between the residuals of each regression and seawater temperature, salinity, pressure, pH or carbonate ion concentrations, suggesting that these variables were not significant secondary dependencies of these proxies. Four D. dianthus specimens growing at locations with Oarag < 0.6 displayed markedly depleted P/Ca compared to the regression based on the remaining samples, a behavior attributed to an undersaturation effect. These corals were excluded from the calibration. Coral U/Ca correlates with seawater carbonate ion: U/Cacoral(umol/mol) = (-0.016 +/- 0.003) [CO32-] (umol/kg) + (3.2 +/- 0.3), R2 = 0.6, n = 17. The residuals of the U/Ca calibration are not significantly related to temperature, salinity, or pressure. Scatter about the linear calibration lines is attributed to imperfect spatial-temporal matches between the selected globally distributed specimens and available water column chemical data, and potentially to unresolved additional effects. The uncertainties of these initial proxy calibration regressions predict that dissolved phosphate could be reconstructed to +/-0.4 umol/kg (for 1.3-1.9 umol/kg phosphate), and dissolved Ba to +/-19 nmol/kg (for 41-82 nmol/kg Basw). Carbonate ion concentration derived from U/Ca has an uncertainty of +/-31umol/kg (for 60-120umol/kg CO32-). The effect of microskeletal variability on P/Ca, Ba/Ca, and U/Ca was also assessed, with emphasis on centers of calcification, Fe-Mn phases, and external contaminants. Overall, the results show strong potential for reconstructing aspects of water mass mixing and biogeochemical processes in intermediate and deep waters using fossil deep-sea corals. STUDY NOTES: Calibration of P/Ca, Ba/Ca, and U/Ca in the deep-sea coral Desmophyllum dianthus NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Anagnostou, E. Investigator : Sherrell, R.M. Investigator : Gagnon, A. Investigator : LaVigne, M. Investigator : Field, M.P. Investigator : McDonough, W.F. 2016-07-18 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20347 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/anagnostou2011elem.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/anagnostou2011elem.txt English https://www.ncdc.noaa.gov/paleo/study/20347 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/anagnostou2011elem.txt Eleni Anagnostou, Robert M. Sherrell, Alex Gagnon, Michele LaVigne, M. Paul Field, William F. McDonough2011Seawater nutrient and carbonate ion concentrations recorded as P/Ca, Ba/Ca, and U/Ca in the deep-sea coral Desmophyllum dianthusGeochimica et Cosmochimica Acta7592529-254310.1016/j.gca.2011.02.019http://www.sciencedirect.com/science/article/pii/S0016703711000986 START YEAR: 1888 AD * END YEAR: 1999 AD -180 -90 180 90