noaa-coral-20348 Deep Sea Coral Global Boron Isotope Data Anagnostou, E.; Huang, K.-F.; You, C.-F.; Sikes, E.L.; Sherrell, R.M. Deep Sea Coral Global Boron Isotope Data 2016-07-18 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20348 Investigator E. Anagnostou Investigator K.-F. Huang Investigator C.-F. You Investigator E.L. Sikes Investigator R.M. Sherrell 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 delta 11B,Desmophyllum dianthus,range,per mil SRM 951,null,corals and sclerosponges,averaged,multiple collector inductively-coupled plasma mass spectrometry,N,2*d11B range about the mean earth science paleoclimate instrumental pH,sea water,null,dimensionless,null,instrumental,null,null,N,null earth science paleoclimate instrumental pH,sea water,unspecified margin of error,dimensionless,null,instrumental,null,null,N,null earth science paleoclimate instrumental dissociation constant,sea water,null,dimensionless,null,instrumental,null,null,N,for boric acid and borate ion earth science paleoclimate instrumental delta 11B,borate ion|sea water,null,per mil,null,instrumental,null,null,N,measured on seawater borate ion earth science paleoclimate instrumental aragonite saturation state,sea water,null,dimensionless,null,instrumental,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges pH,delta 11B|sea water,range,dimensionless,null,climate reconstructions|corals and sclerosponges,differenced,null,N,based on 2*d11B range about the mean earth science paleoclimate climate reconstructions|corals and sclerosponges collection water depth,null,null,meter,null,climate reconstructions|corals and sclerosponges,null,null,N,collection depth of corals earth science paleoclimate corals and sclerosponges delta 11B,Desmophyllum dianthus,null,per mil SRM 951,null,corals and sclerosponges,averaged,multiple collector inductively-coupled plasma mass spectrometry,N,average of replicate boron isotope measurements in coral skeleton 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 weight,Desmophyllum dianthus,null,milligram,null,corals and sclerosponges,null,null,N,coralsubsample weight use for boron isotope analysis earth science paleoclimate corals and sclerosponges delta 11B,Desmophyllum dianthus,null,per mil SRM 951,null,corals and sclerosponges,averaged,multiple collector inductively-coupled plasma mass spectrometry,N,null earth science paleoclimate corals and sclerosponges delta 11B,Desmophyllum dianthus,null,per mil SRM 951,null,corals and sclerosponges,differenced,multiple collector inductively-coupled plasma mass spectrometry,N,offset in boron isotopes in coral skeleton replicates earth science paleoclimate instrumental salinity,sea water,null,practical salinity unit,null,instrumental,null,null,N,null earth science paleoclimate instrumental alkalinity,sea water,null,microequivalent per kilogram,null,instrumental,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges pH,delta 11B|sea water,null,dimensionless,null,climate reconstructions|corals and sclerosponges,differenced,null,N,pH indicated by d11B minus pH In seawater earth science paleoclimate corals and sclerosponges weight,Desmophyllum dianthus,null,milligram,null,corals and sclerosponges,null,null,N,mass of resampled coral; when no mass is indicated but values are reported they refer to subsampling of the initial solid aliquot or replicate of dissolved sample earth science paleoclimate instrumental sea water temperature,null,null,degree Celsius,null,instrumental,null,null,N,null earth science paleoclimate corals and sclerosponges sample identification,null,null,null,null,corals and sclerosponges,null,null,C,Hydrographic section number from WOCE program earth science paleoclimate corals and sclerosponges sample identification,null,null,null,null,corals and sclerosponges,null,null,C,hydrographic station number on WOCE section earth science paleoclimate climate reconstructions|corals and sclerosponges latitude,null,null,degree north,null,climate reconstructions|corals and sclerosponges,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges longitude,null,null,degree east,null,climate reconstructions|corals and sclerosponges,null,null,N,null earth science paleoclimate corals and sclerosponges collection date,null,null,year Common Era,null,corals and sclerosponges,null,null,N,year hydrographic data collected earth science paleoclimate instrumental dissolved inorganic carbon,sea water,null,micromole per kilogram,null,instrumental,null,null,N,null 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. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII E. Anagnostou, K.-F. Huang, C.-F. You, E.L. Sikes, R.M. Sherrell 2012 Earth and Planetary Science Letters 349-350 251-260 10.1016/j.epsl.2012.07.006

The boron isotope ratio (d11B) of foraminifers and tropical corals has been proposed to record seawater pH. To test the veracity and practicality of this potential paleo-pH proxy in deep sea corals, samples of skeletal material from twelve archived modern Desmophyllum dianthus (D. dianthus) corals from a depth range of 274-1470 m in the Atlantic, Pacific, and Southern Oceans, ambient pH range 7.57-8.05, were analyzed for d11B. The d11B values for these corals, spanning a range from 23.56 to 27.88, are found to be related to seawater borate d11B by the linear regression: d11Bcoral=(0.76+/-0.28) d11Bborate+(14.67+/-4.19) (1 standard error (SE)). The D. dianthus d11B values are greater than those measured in tropical corals, and suggest substantial physiological modification of pH in the calcifying space by a value that is an inverse function of seawater pH. This mechanism partially compensates for the range of ocean pH and aragonite saturation at which this species grows, enhancing aragonite precipitation and suggesting an adaptation mechanism to low pH environments in intermediate and deep waters. Consistent with the findings of Trotter et al. (2011) for tropical surface corals, the data suggest an inverse correlation between the magnitude of a biologically driven pH offset recorded in the coral skeleton, and the seawater pH, described by the equation: DpH=pH recorded by coral-seawater pH=-(0.75+/-0.12) pHw+(6.88+/-0.93) (1 SE). Error analysis based on 95% confidence interval(CI) and the standard deviation of the regression residuals suggests that the uncertainty of seawater pH reconstructed from d11Bcoral is +/-0.07 to 0.12 pH units. This study demonstrates the applicability of d11B in D. dianthus to record ambient seawater pH and holds promise for reconstructing oceanic pH distribution and history using fossil corals. STUDY NOTES: Calibration of boron isotopes in the deep-sea coral Desmophyllum dianthus

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/anagnostou2012boron.txt Data File; Deep Sea Coral Global Boron Isotope Data USA/NOAA DIF Version 9.8.4 2019-06-06 2019-06-06