fbee7b3d-bf85-452a-b8c4-a83dce4e14ce 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 2021-07-14 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 Ice tilt time-series from sensors installed in boreholes drilled into Khumbu Glacier, Nepal, in 2017 and 2018 as part of EverDrill research project - VERSION 2.0 2021-07-14 creation 2021-07-14 revision 2021-07-14 publication 2021-07-14 released 2.0 https://doi.org/10.5285/fbee7b3d-bf85-452a-b8c4-a83dce4e14ce doi GB/NERC/BAS/PDC/01524 https://data.bas.ac.uk/ NE/P00265X/1 award NE/P002021/1 award Please cite this item as: Hubbard, B., Miles, K., Doyle, S., Quincey, D., & Miles, E. (2021). Ice tilt time-series from sensors installed in boreholes drilled into Khumbu Glacier, Nepal, in 2017 and 2018 as part of EverDrill research project - VERSION 2.0 (Version 2.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/fbee7b3d-bf85-452a-b8c4-a83dce4e14ce The datasets are ice tilt time series from strings of accelerometers, each located at a discrete depth within one of three boreholes into Khumbu Glacier, Nepal. Ice deformation can be derived from this tilt data, but has not yet been calculated. Boreholes were drilled in May 2017 and 2018 to investigate the internal properties of Khumbu Glacier, specifically ice thickness, temperature, deformation and structure, as part of the NERC-funded 'EverDrill' research project. Supporting borehole information is provided as a related dataset. Funding was provided by the NERC grant NE/P00265X/1 and NE/P002021/1. No credit. completed Hubbard, Bryn Aberystwyth University Researcher author Miles, Katie Aberystwyth University Researcher author Doyle, Samuel Aberystwyth University Researcher author Quincey, Duncan University of Leeds Researcher author Miles, Evan 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 > Glacier Motion/Ice Sheet Motion EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers EARTH SCIENCE > Cryosphere > Snow/Ice > Ice Motion 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 Ice boreholes Ice deformation Khumbu Glacier, Nepal theme Khumbu Glacier, Himalaya Nepal place Elevation Meteorological 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 supplied under Open Government Licence v3.0 otherRestrictions No restrictions apply. url url crossReference url url largerWorkCitation doi doi crossReference textTable eng utf8 climatologyMeteorologyAtmosphere environment 86.83 86.85 27.97 27.99 2017-05-17 2019-10-20 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 6186598 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fbee7b3d-bf85-452a-b8c4-a83dce4e14ce WWW:LINK-1.0-http--link Get Data Download data download bytes 6186598 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=fbee7b3d-bf85-452a-b8c4-a83dce4e14ce WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The datasets are ice deformation time series recorded by accelerometers mounted on strings installed into three boreholes drilled into Khumbu Glacier, Nepal. For borehole information, see the related datasets. Data collection: Borehole tilt and ice deformation sensors installed in 2017 were three-axis analog micromechanical system accelerometers (model MMA7361), controlled by Campbell Scientific CR1000 data loggers from the glacier surface. The sensors were installed so that the z axis recorded approximately 1 g when hanging vertically in the borehole. The digital sensors installed in 2018 are three-axis accelerometer/three-axes gyroscopes (model MPU6050), and also contain thermistors to measure temperature (model DS18B20), all controlled by a RS-485 data logger. Roll and pitch read values of 0 when the sensor is perfectly vertical hanging in the borehole. Resolution: The accelerometers installed in 2017 have an accuracy of 800 mV g-1 stated by the manufacturer (where g is the normalised gravity vector). A further calibration was carried out (details in Doyle et al. (2018)), resulting in the absolute accuracy of the tilt sensors being determined to be less than +/- 1 degree. The digital sensors installed in 2018 also measured temperature, however, these were not calibrated and are therefore only accurate to +/- 0.5 degrees Celsius. Data quality: Detailed methodology, including accuracy estimation, is presented in the referenced publication. Resolution: The accelerometers installed in 2017 have an accuracy of 800 mV g-1 stated by the manufacturer (where g is the normalised gravity vector). A further calibration was carried out (details in Doyle et al. (2018)), resulting in the absolute accuracy of the tilt sensors being determined to be less than ± 1 degree. The digital sensors installed in 2018 also measured temperature, however, these were not calibrated and are therefore only accurate to ± 0.5 degrees Celsius. asNeeded completed