371f680f-2c0b-4558-9a85-12aa8722be7e 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 2025-05-27 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 Annual diatom abundance and diversity from the Jurassic ice core, Antarctic Peninsula (1873-2012 CE) 2025-05-27 creation 2025-05-27 revision 2025-05-27 publication 2025-05-27 released 1.0 https://doi.org/10.5285/371f680f-2c0b-4558-9a85-12aa8722be7e doi GB/NERC/BAS/PDC/02064 https://data.bas.ac.uk/ Please cite this item as: Tetzner, D., Allen, C., Thomas, E., Wolff, E., & Franzke, C. (2025). Annual diatom abundance and diversity from the Jurassic ice core, Antarctic Peninsula (1873-2012 CE) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/371f680f-2c0b-4558-9a85-12aa8722be7e This dataset provides information on the annual abundance and diversity of diatoms preserved in ice layers from a Jurassic ice core that was drilled in 2012 from the Southern West Antarctic Peninsula. The diatom record spans the entire depth of the ice core (0-140 meters) and represents the interval from 1873 to 2012 CE. Meltwater from the annual layers of the ice core was filtered, and the filters were analyzed using a scanning electron microscope for the identification and classification of diatoms. This dataset was utilized to reconstruct past changes in the westerly winds of the Southern Hemisphere, with the results presented in Tetzner et al. (2025). Funding: This research was funded by CONICYT-Becas Chile and Cambridge Trust funding programme for PhD studies under grant number 72180432. No credit. completed Tetzner, Dieter British Antarctic Survey Researcher author Allen, Claire British Antarctic Survey Researcher author Thomas, Elizabeth British Antarctic Survey Researcher author Wolff, Eric University of Cambridge Researcher author Franzke, Christian Pusan National University 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 > Biosphere > Microbiota Taxonomy > Diatoms EARTH SCIENCE > Paleoclimate > Ice Core Records 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 Antarctica Southern Hemisphere Westerly Winds diatoms ice core theme Southern West Antarctic Peninsula Antarctica place Habitats and biotopes 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 Data supplied under Open Government Licence v3.0 otherRestrictions No restrictions apply. url url crossReference textTable eng utf8 climatologyMeteorologyAtmosphere -73.06 -73.06 -74.33 -74.33 1873-01-01 2012-12-31 1139.0 1139.0 urn:ogc:def:crs:EPSG::5714 MSL height Not specific to any location or epoch. Hydrography. 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 bytes 20480 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=371f680f-2c0b-4558-9a85-12aa8722be7e WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The Jurassic ice core was drilled in the austral summer 2012/2013 CE to a depth of 140m using the British Antarctic Survey (BAS) electromechanical, 104 mm diameter drill. An ice chronology was established for this core based on the annual cycles of hydrogen peroxide (H2O2) and the non-sea salt component of sulphate (nssSO42-). The estimated dating error was <+/-7 months for each year and with no accumulated error. Diatom samples were obtained by filtering meltwater from annual layers of the Jurassic ice core. Jurassic ice core meltwater was filtered through 1.0 micro-meter pore size filters, which were later imaged using a Quanta-650F Scanning Electron Microscope (SEM) at the Earth Sciences Department, University of Cambridge. Diatom identification and ecological associations were based on published Southern Ocean databases and references therein (Armand et al., 2005; Hasle and Syvertsen, 1997; Cefarelli et al., 2010; Zielinski and Gersonde, 1997). Data collection: Quanta-650F Scanning Electron Microscope (SEM) at the Earth Sciences Department, University of Cambridge. Data quality: Diatom samples were processed and analysed according to the methods and constraints outlined in Tetzner et al. (2021) and Tetzner et al. (2025). Annual layer meltwater from Jurassic ice core was filtered using polycarbonate membrane filters with a pore diameter of 1.0 ?m. After filtration, the filters were scanned using a Scanning Electron Microscope (SEM). One-third of the filter area was scanned, in line with the observations from Tetzner et al. (2021) and Tetzner et al. (2025), which noted that diatoms tend to have a homogeneous spatial distribution when the counts over one-third of the filter area are six or more. The main diatom assemblage composition was established from the identified species and groups with abundances higher than 2.0% of the whole assemblage. asNeeded completed