30f96898-c12a-4783-8a31-0628b74a616a 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 2024-06-20 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 Terminus Positions of Jakobshavn Isbrae, Greenland, 2022-2023 2024-06-20 creation 2024-06-20 revision 2024-06-20 publication 2024-06-20 released 1.0 https://doi.org/10.5285/30f96898-c12a-4783-8a31-0628b74a616a doi GB/NERC/BAS/PDC/01856 https://data.bas.ac.uk/ NE/S007407/1 award Please cite this item as: Picton, H. (2024). Terminus Positions of Jakobshavn Isbrae, Greenland, 2022-2023 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/30f96898-c12a-4783-8a31-0628b74a616a The dataset consists of a single shapefile containing terminus positions of Jakobshavn Isbrae, Ilulissat Icefjord, Greenland, between 2022-2023. Jakobshavn Isbrae is a fast-flowing outlet glacier situated in central west Greenland and terminates in Ilulissat Icefjord, a deep fjord basin renewed by water from Disko Bay (Gladish et al., 2015). Each polyline feature in this dataset reflects a terminus position manually digitised using synthetic aperture radar (SAR) mosaics downloaded from the National Snow and Ice Data Center (NSIDC; Joughin, 2021). The dataset comprises 31 terminus positions in total, each digitised from imagery collected between 02/01/2022 and 28/12/2022. Hannah Picton acknowledges funding from the E4 DTP (Edinburgh Earth, Ecology and Environment Doctoral Training Partnership), NE/S007407/1. No credit. completed Picton, Hannah University of Edinburgh 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 > Cryosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers 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 Greenland Jakobshavn Isbrae ice dynamics outlet glacier terminus position theme Jakobshavn Isbrae, Ilulissat Icefjord Greenland place Elevation 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. doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url largerWorkCitation url url crossReference textTable eng utf8 inlandWaters -49.7 -49.5 69.0 69.2 2022-01-02 2022-12-28 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 application/octet-stream text/plain bytes 152371 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=30f96898-c12a-4783-8a31-0628b74a616a WWW:LINK-1.0-http--link Get Data Download data download bytes 152371 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=30f96898-c12a-4783-8a31-0628b74a616a WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Each terminus position was manually digitised within QGIS using Sentinel-1A and Sentinel-1B SAR mosaics (Joughin et al., 2016) downloaded from the NSIDC (Joughin, 2021). The details of each SAR mosaic from which a given terminus position was digitised is provided in the attribute table of the shapefile. Data collection: QGIS Version 3.22.6. Data quality: Black and Joughin (2023) state that the typical uncertainty associated with such manually digitised terminus positions is typically 25 m, however this may be higher at heavily crevassed termini, or at tidewater glaciers which discharge into adjacent melange or sea ice. A quality flag is thus provided for each individual shapefile; a value of 0 indicates certainty regarding the digitisation, whilst a value of 1 indicates the uncertainty may be greater than 25 m. It should however be noted that, at Jakobshavn Isbrae, seasonal changes in terminus position greatly exceed this estimated uncertainty. asNeeded completed