fca1c981-98dc-4f4f-bbdf-822062df87ac 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 2020-01-14 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 Sea-ice floe size distribution data derived from USGS GFL high-resolution satellite imagery for the pre-ponding period of 2000-2014 2020-01-14 creation 2020-01-14 revision 2020-01-14 publication 2020-01-14 released 1.0 https://doi.org/10.5285/fca1c981-98dc-4f4f-bbdf-822062df87ac doi GB/NERC/BAS/PDC/01295 https://data.bas.ac.uk/ NE/R000654/1 award Please cite this item as: Hwang, B. (2020). Sea-ice floe size distribution data derived from USGS GFL high-resolution satellite imagery for the pre-ponding period of 2000-2014 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/fca1c981-98dc-4f4f-bbdf-822062df87ac The dataset (FSD-GFL-res2m-Preponding) contains sea-ice floe ice distribution (FSD) data derived from the Global Fiducials Library (GFL) imagery during the pre-ponding period at the three fiducial sites, using the algorithms described in Hwang et al. (2017). The GFL imagery is 1-m resolution declassified National Technical Means satellite imagery, also known as the Literal Image Derived Products (LIDPs) (Kwok, 2014). The FSD data derived from the GFL imagery cover the period of 2000 to 2014 at the three fiducial sites at Chukchi Sea (70 deg N and 170 deg W), East Siberian Sea (82 deg N and 150 deg E), and Fram Strait (84.9 deg N and 0.5 deg E). For the production of this dataset, the spatial resolution of the GFL imagery degraded to 2 meters ("res2m") for fast processing. The FSD data are produced for robust model calibration and validation for FSD parameterisations within sea-ice models, and also to improve our understanding of spatial and temporal variations of FSD across the Arctic Ocean. The FSD data have been generated by B. Hwang. This FSD dataset is produced as part of NERC MIZ NE/R000654/1 (Towards a marginal Arctic sea ice cover). No credit. completed Hwang, Byongjun University of Huddersfield 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 > Sea Ice > Ice Extent EARTH SCIENCE > Cryosphere > Sea Ice > Ice Floes EARTH SCIENCE > Oceans > Sea Ice > Ice Extent EARTH SCIENCE > Oceans > Sea Ice > Ice Floes 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 Arctic Floe size Lateral melt Marginal Ice Zone Sea ice theme Chukchi Sea Arctic East Siberian Sea Arctic Fram Strait Arctic place 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 This data is supplied under Open Government Licence v3.0 otherRestrictions No restrictions apply. url url crossReference textTable eng utf8 climatologyMeteorologyAtmosphere environment geoscientificInformation imageryBaseMapsEarthCover oceans -170.0 -170.0 70.0 70.0 2000-01-01 2013-12-31 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/plain image/png bytes 39216742 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fca1c981-98dc-4f4f-bbdf-822062df87ac WWW:LINK-1.0-http--link Get Data Download data download bytes 39216742 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fca1c981-98dc-4f4f-bbdf-822062df87ac WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The dataset contains the FSD data derived from the GFL imagery at the three fixed locations across the Arctic Ocean. The GFL imagery is 1-m resolution declassified intelligence satellite imagery (National Technical Means), later released to the public by USGS (United States Geological Survey). The imagery data have been obtained from the USGS GFL website. For the production of this dataset, we used the GFL imagery data acquired at the three fiducial sites - Chukchi Sea (70°N and 170°W), East Siberian Sea (82°N and 150°E), and Fram Strait (84.9°N and 0.5°E). The imagery data at the fiducial sites are available as early as 2000 until 2014, providing a long-term collection of the data. This FSD dataset contains the pre-ponding period (i.e., ponding on the ice is not visible in the imagery). Total 41 images were analysed to derive the FSD using the algorithm described in Hwang et al. (2017). The original imagery is available at 1-m resolution but reduced to the 2-m resolution ("res2m") for the FSD retrieval. The FSD dataset was produced by using the algorithms as described in Hwang et al. (2017), which were implemented in MATLAB. Data quality: The data quality was checked through manual inspections by the data producer, but the absolute accuracy of the data is unknown due to lack of ground-truth data (see Hwang et al., 2017). asNeeded completed