ee141bb8-ecc2-4305-9978-05fe9521f10a eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2019-07-31 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Trace element and boron isotopic composition of Drake Passage deep-sea corals 2019-07-31 creation 2019-07-31 revision 2019-07-31 publication 2019-07-31 released 1.0 https://doi.org/10.5285/ee141bb8-ecc2-4305-9978-05fe9521f10a doi GB/NERC/BAS/PDC/01214 https://data.bas.ac.uk/ NE/N003861/1 award Please cite this item as: Stewart, J., Rae, J., Spooner, P., Robinson, L., Littley, E., & Cole, C. (2020). Trace element and boron isotopic composition of Drake Passage deep-sea corals (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/ee141bb8-ecc2-4305-9978-05fe9521f10a Changes of circulation pattern in the Southern Ocean have been invoked to explain a significant portion of the increase in the atmospheric carbon dioxide during the last deglaciation. However, the accurate timing and thus underlying mechanisms of these changes are still controversial, requiring knowledge of different water masses movements with absolute age constraints. Aragonitic scleractinian deep-sea corals, recovered from a broad range of depths in the Drake Passage, provide a unique opportunity to investigate Southern Ocean ventilation with precise U-Th age control. This data submission includes trace element and delta11B for Drake Passage corals. Funding was provided by the NERC standard grant NE/N003861/1. No credit. completed Stewart, Joseph University of Bristol Researcher author Rae, James University of St Andrews Researcher author Spooner, Peter University College London Researcher author Robinson, Laura University of Bristol Researcher author Littley, Eloise University of St Andrews Researcher author Cole, Cathy University of St Andrews Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Oceans > Ocean Chemistry > Trace Elements EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Coral Deposits EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Isotopes EARTH SCIENCE > Oceans > Ocean Circulation theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Drake Passage Southern Ocean boron isotopes deep-sea coral trace element theme Drake Passage Southern Ocean place Oceanographic geographical features Geology theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions This data is governed by the NERC data policy and supplied under Open Government Licence v.3 otherRestrictions No restrictions apply. url url crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url crossReference doi doi crossReference doi doi crossReference textTable eng utf8 biota oceans -67.11667 -58.38333 -60.1 -54.08333 2008-01-01 2011-12-31 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/csv application/pdf bytes 114688 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=ee141bb8-ecc2-4305-9978-05fe9521f10a WWW:LINK-1.0-http--link Get Data Download data download bytes 114688 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=ee141bb8-ecc2-4305-9978-05fe9521f10a WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Whole septa and attached theca were taken from cup corals samples using a rotary cutting tool. This tool was further used to remove surficial oxide coatings and any chalky white altered carbonate. Microstructures within cold-water corals are known to exhibit highly contrasting delta11B, therefore where sufficient sample material allowed, multiple sub-samples (typically duplicates) were measured to assess microstructural bias. Coral fragments were finely crushed using a pestle and mortar before a 2 to 4 mg aliquot of the homogenous powder was taken. A warm 1% H2O2 (buffered in NH4OH) oxidative clean and weak acid polish (0.0005 M HNO3) was performed on powders. Samples were then dissolved in distilled 0.5 M HNO3. All analyses were carried out at the Univ. of Bristol and Univ. of St Andrews. An aliquot of the dissolved sample was analyzed by ICP-MS using well-characterised, matrix-matched, synthetic standard solutions to yield trace metal ratios to calcium. Repeat analysis of NIST RM 8301c (n=35) yielded analytical precision of <±2% for Li/Ca, B/Ca, Na/Ca, Mg/Ca, Sr/Ca, Cd/Ca, Ba/Ca, and U/Ca ratios; <±5% for Al/Ca, Mn/Ca, Ni/Ca, Nd/Ca, and W/Ca ratios; ±10% for Cu/Ca; ±16% for Fe/Ca and Zn/Ca; and >±25% for Sn/Ca and Pb/Ca. A further aliquot of the dissolved sample containing ~65 ng B was separated from the carbonate matrix using 20 microliter micro-columns containing Amberlite IRA 743 boron-specific anionic exchange resin. The delta11B of purified boron samples were measured by (MC)-ICPMS against NIST SRM 951 at St Andrews and Bristol following identical protocols (Foster, 2008; Foster et al., 2013; Rae et al., 2011). Published and ongoing interlaboratory comparison studies reveal no systematic analytical offset between these institutions (Foster et al., 2013). Samples, blanks, and standards were introduced to the instrument in a 0.5 M HNO3 and 0.3 M HF acid matrix to aim B wash out (Misra et al., 2014; Rae et al., 2018). Full procedural uncertainty is assessed using repeat measurement of NIST 8301c consistency standard yielding average delta11B values of 24.19 ± 0.22per mille at Bristol (n=14) and 24.12 ± 0.12per mille at St Andrews (n=15). Total procedural blanks (n=21) were on average <0.25% of the sample boron loaded onto columns. References: Foster, G. L. (2008). Seawater pH, pCO2 and [CO^2-3] variations in the Caribbean Sea over the last 130 kyr: A boron isotope and B/Ca study of planktic foraminifera. Earth and Planetary Science Letters, 271(1-4), 254-266. DOI: 10.1016/j.epsl.2008.04.015 Foster, G. L., Hönisch, B., Paris, G., Dwyer, G. S., Rae, J. W. B., Elliott, T., ... Vengosh, A. (2013). Interlaboratory comparison of boron isotope analyses of boric acid, seawater and marine CaCO3 by MC-ICPMS and NTIMS. Chemical Geology, 358, 1-14. DOI: 10.1016/j.chemgeo.2013.08.027 Rae, JWB, Foster, GL, Schmidt, DN & Elliott, T 2011, 'Boron isotopes and B/Ca ratios in benthic foraminifera: proxies for the deep ocean carbonate system' Earth and Planetary Science Letters, vol. 302, no. 3-4, pp. 403-413. https://doi.org/10.1016/j.epsl.2010.12.034 Misra, S., Owen, R., Kerr, J. & Greaves, M. Determination of delta11B by HR-ICP-MS from mass limited samples: application to natural carbonates and water samples. Geochim. Cosmochim. Acta 140, 531-552 (2014). Rae JWB, Burke A, Robinson LF, Adkins AJ, Chen T, Cole C, Greenop R, Li T,E. Littley E, Nita DC (2018) CO2 storage and release in the deep Southern Ocean on millennial to centennial timescales Nature 562 (7728), p.569 Data collection: Multi-Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS, Thermo Neptune and Neptune Plus) Single Collector Mass Spectrometer (ICPMS, Thermo Element2; Agilent 7500) Data quality: Limits of detection for trace metal analyses by ICP-MS were calculated for each analytical batch using the average blank (in counts per second) plus 5 standard deviation of the blank. Sample results that returned below this threshold within each run are quoted as '<LOD'. asNeeded completed