noaa-coral-20347 Deep-Sea Coral Global Trace Metal Data Anagnostou, E.; Sherrell, R.M.; Gagnon, A.; LaVigne, M.; Field, M.P.; McDonough, W.F. Deep-Sea Coral Global Trace Metal Data 2016-07-18 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20347 Investigator E. Anagnostou Investigator R.M. Sherrell Investigator A. Gagnon Investigator M. LaVigne Investigator M.P. Field Investigator W.F. McDonough 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 trace metals geoscientificInformation 1888 AD 1999 AD 62 cal yr BP -49 cal yr BP Complete -90 90 -180 180 Geographic Region Global Global>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 Eleni Anagnostou, Robert M. Sherrell, Alex Gagnon, Michele LaVigne, M. Paul Field, William F. McDonough 2011 Geochimica et Cosmochimica Acta 75 9 2529-2543 10.1016/j.gca.2011.02.019 http://www.sciencedirect.com/science/article/pii/S0016703711000986

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

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/anagnostou2011elem.txt Data File; Deep-Sea Coral Global Trace Metal Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11