63af1e57-8f20-4fb1-a55c-bd0e703f8a56 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 2018-10-05 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 Analysis of d18O and salinity from sea ice and meltwater pool water samples collected in April 2016 in the Weddell Sea and Scotia Sea of the Southern Ocean during the marine survey JR15006 2018-10-05 creation 2018-10-05 revision 2018-10-05 publication 2018-10-05 released 1 https://doi.org/10.5285/63af1e57-8f20-4fb1-a55c-bd0e703f8a56 doi GB/NERC/BAS/PDC/01103 https://data.bas.ac.uk/ Please cite this item as: None The dataset contains oxygen stable isotope and salinity measurements from water samples collected from sea ice and meltwater pools in April 2016 in the region of South Georgia, Signy and deep within the Weddell Sea pack ice during the marine survey JR15006. The d18O and salinity measurements from sea ice and meltwater sources complement the same analysis from CTD casts and underway non-toxic flow water system on the RRS James Clark Ross during the JR15006. Establishing d18O and salinity values for saline water and oceanic freshwater components can be used to identify sources and changes of freshwater contributions to the ocean. No credit. completed Leng, Melanie British Geological Survey Researcher author Arrowsmith, Carol British Geological Survey Researcher author Meredith, Michael British Antarctic Survey 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 > Hydrosphere > Snow/Ice > Snow Melt EARTH SCIENCE > Oceans > Sea Ice > Isotopes EARTH SCIENCE > Oceans > Sea Ice > Pack Ice EARTH SCIENCE > Oceans > Sea Ice > Salinity EARTH SCIENCE > Hydrosphere > Surface Water 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 d18O meltwater pool salinity sea ice theme Weddell Sea Southern Ocean Scotia Sea Southern Ocean place Hydrography Oceanographic geographical features 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 Data released under Open Government Licence V3.0: url url crossReference url url crossReference url url crossReference url url largerWorkCitation textTable eng utf8 environment inlandWaters oceans -45.61521 -27.04976 -68.1511 -54.30761 2016-03-31 2016-04-26 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 bytes 1 https://www.bodc.ac.uk/data/bodc_database/nodb/data_collection/6618/ WWW:LINK-1.0-http--link Get Data Download data download bytes 1 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=63af1e57-8f20-4fb1-a55c-bd0e703f8a56 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: At all sample locations, 2 or more salinity bottles and d18O vials were filled following the usual procedure. The d18O vials were rinsed 3 times, filled and dried before being closed with a stopper and sealed with the crimper. Oxygen isotope (d18O) measurements were made using the CO2 equilibration method with an Isoprime 100 mass spectrometer plus Aquaprep device. 90 samples (200µl of water) were loaded into Labco Limited exetainers (3.7ml) and placed in the heated sample tray at 40°C. The exetainers were then evacuated to remove atmosphere then flushed with CO2 and left to equilibrate for between 12 (first sample) - 37 (last sample) hours. Each individual gas sample was then admitted to the cryogenic water trap where any water vapour is removed. The dry sample gas was then expanded into the dual inlet where it was measured on the transducer before being expanded in the dual inlet bellows. Ionvantage software then balances the reference bellows relative to this volume. The sample and reference CO2 gases enter alternatively into the Isoprime100 through the dual changeover valve for isotope ratio measurement. In each run two laboratory standards (CA-HI and CA-LO) plus up to 2 secondary standards were analysed in triplicate. The value of these laboratory standards has been accurately determined by comparison with international calibration and reference materials (VSMOW2, SLAP2 and GISP) and so the 18O/16O ratios (versus VSMOW2) of the unknown samples can be calculated and are expressed in delta units, d18O (parts per mille). Errors are < +/- 0.05 per mil. asNeeded completed