5cc71534-7f97-4974-8271-d407f1188e2f 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 2020-03-06 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 Calving data from a lacustrine margin of Russell Glacier, west Greenland between July 2014 and September 2015 2020-03-06 creation 2020-03-06 revision 2020-03-06 publication 2020-03-06 released 1.0 https://doi.org/10.5285/5cc71534-7f97-4974-8271-d407f1188e2f doi GB/NERC/BAS/PDC/01314 https://data.bas.ac.uk/ Please cite this item as: Mallalieu, J. (2020). Calving data from a lacustrine margin of Russell Glacier, west Greenland between July 2014 and September 2015 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/5cc71534-7f97-4974-8271-d407f1188e2f A record of subaerial calving activity at a lacustrine margin of Russell Glacier, west Greenland, comprising 290 calving events classified by volume, area and calving mechanism. Data were acquired continuously from July 2014 to September 2015 using an array of time-lapse cameras. Imagery from the cameras was employed to generate a time-series of ice-margin point clouds, which were then differenced to determine calving properties. The dataset is designed to facilitate the analysis of seasonality in lacustrine calving processes. Supplementary point clouds were also generated to investigate the effects of two lake drainage events on calving processes in the summers of 2014 and 2015. Point cloud parameters and a record of lake stage are also included. The dataset was collected and processed by researchers in the School of Geography at the University of Leeds. Funding was provided by Royal Institute of Chartered Surveyors Research Trust (project number 474), The Mount Everest Foundation, The Gilchrist Educational Trust, and Sigma Xi. No credit. completed Mallalieu, Joseph University of Leeds 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 > Glaciers EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glaciers EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets 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 Calving Greenland ice sheet Russell Glacier ice-marginal lake theme Russell Glacier, Qeqqata municipality Greenland place Elevation Hydrography 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 textTable eng utf8 environment geoscientificInformation inlandWaters -50.07517 -50.0654 67.13189 67.13627 2014-06-27 2015-09-20 405.0 450.0 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/plain text/csv bytes 40960 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5cc71534-7f97-4974-8271-d407f1188e2f WWW:LINK-1.0-http--link Get Data Download data download bytes 40960 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5cc71534-7f97-4974-8271-d407f1188e2f WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Data were derived from a time-series of point clouds of ice-margin topography. The point clouds were generated at 24 hour to 28 day intervals by using Structure-from-Motion techniques to process discrete image sets acquired from between 7-15 time-lapse cameras. Successive point clouds were co-registered and differenced to quantify calving properties. Classification of calving mechanisms was based on geometric changes at the ice-margin, interpretation of camera imagery pre- and post-calving, and existing calving categorisations. Full details of camera installation and point cloud processing are included in the following: Mallalieu et al. 2017 An integrated Structure-from-Motion and time-lapse technique for quantifying ice-margin dynamics. Journal of Glaciology, 63(242), 937-949. doi:10.1017/jog.2017.48 Mallalieu, J., Carrivick, J. L., Quincey, D. J., & Smith, M. W.. (2020). Calving seasonality associated with melt-undercutting and lake ice cover. Geophysical Research Letters, 47, e2019GL086561. https://doi.org/10.1029/2019GL086561 Data collection: Time-lapse camera imagery was acquired by LtL Acorn 5210A trail cameras. Ground Control Points were surveyed using a Leica System 500 dGPS. Camera imagery was processed in Agisoft Photoscan Professional v.1.2.5 to generate point clouds. Point clouds were co-registered, differenced and analysed in CloudCompare v.2.7. Resolution: Point cloud densities range from 18-37 pts m2 Data quality: Point cloud quality varies throughout the survey due to the nature of the time-lapse camera setup. Please see the dataset for parameters of individual point clouds, including: georeferencing RMSE; point cloud size; point cloud density; number of ground control points; and number of aligned cameras. Variability in the sampling interval between successive clouds was due to inclement weather conditions. asNeeded completed