05f8bd4b-97b1-43d0-a1c6-66aea7021aaf 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 2022-09-07 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 MetUM and HIRHAM5 simulations of summer near-surface temperatures over Antarctica from 1979 to 2019 2022-09-07 creation 2022-09-07 revision 2022-09-07 publication 2022-09-07 released 1.0 https://doi.org/10.5285/05f8bd4b-97b1-43d0-a1c6-66aea7021aaf doi GB/NERC/BAS/PDC/01662 https://data.bas.ac.uk/ Please cite this item as: Orr, A., Boberg, F., & Phillips, T. (2022). MetUM and HIRHAM5 simulations of summer near-surface temperatures over Antarctica from 1979 to 2019 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/05f8bd4b-97b1-43d0-a1c6-66aea7021aaf High-resolution hindcasts (1979-2019) of summer climate over Antarctica using the UK Met Office Unified Model (MetUM) and HIRHAM5 were conducted at the British Antarctic Survey and Danish Meteorological Institute, respectively. The hindcasts are conducted for summer 1979-2018, i.e., from December 1979 to February 2019, for December, January, February (DJF). This dataset consists of near-surface temperature output from these hindcasts at a temporal resolution of every 3 hrs. The hindcasts are contributions to the COordinated Regional Downscaling EXperiment (CORDEX) project. Both models are run over Antarctic CORDEX domains, which encompass all of Antarctica and some of the surrounding ocean, at a horizontal grid spacing of around 12 km. The near-surface temperatures are used to estimate regional surface melt "potential" over Antarctic ice shelves as a function of summertime temperature extremes and identify regions of potentially enhanced "hotspots" of melt potential based on the occurrence (and magnitude) of various temperatures. Funding was provided by the European Union's Horizon 2020 research and innovation framework programme under Grant agreement no. 101003590 (PolarRES) No credit. completed Orr, Andrew British Antarctic Survey Researcher author Boberg, Fredrik Danish Meteorological Institute Researcher author Phillips, Tony British Antarctic Survey 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 > Atmosphere > Atmospheric Temperature > Surface Air Temperature EARTH SCIENCE > Atmosphere > Atmospheric Temperature 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 HIRHAM5 MetUM Polar CORDEX high-resolution atmospheric modelling hindcast theme Antarctica place Atmospheric conditions 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 None doi doi crossReference url url crossReference url url crossReference textTable eng utf8 climatologyMeteorologyAtmosphere -180.0 180.0 -68.245 -53.374 1979-12-01 2019-02-28 2.0 2.0 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 application/x-hdf application/netcdf bytes 15032385536 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=05f8bd4b-97b1-43d0-a1c6-66aea7021aaf WWW:LINK-1.0-http--link Get Data Download data download bytes 15032385536 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=05f8bd4b-97b1-43d0-a1c6-66aea7021aaf WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The UK Met Office Unified Model (known as MetUM) uses the GA6 (Global Atmosphere 6.0; Walters et al., 2017) configuration of version 11.1, which is suitable for grid scales of 10 km or coarser. The HIRHAM5 model combines the physics of the ECHAM5 general circulation model and the hydrostatic dynamical core of the HIRLAM7 numerical weather prediction model (Christensen et al., 2007). The MetUM (HIRHAM5) uses 70 (31) vertical levels in the atmosphere. The ice mask used by both models is derived from Advanced Very High-Resolution Radiometer (AVHRR) data from the period 1992 to 1993 at a resolution of 1 km. Both models are run over Antarctic CORDEX domains from December 1979 to February 2019 at grid spacing of around 12 km, with the MetUM (HIRHAM5) grid consisting of 392 x 504 (406 x 542) grid points. Initial and boundary conditions for both models are supplied by ERA-Interim reanalysis data. The MetUM hindcast uses a frequent re-initialization approach, consisting of twice-daily 24 hr forecasts. Output at T+12, T+15, T+18, and T+21 hr from each of the forecasts is concatenated together to form a seamless series of 3-hourly model outputs, with the earlier output discarded as spin-up. The HIRHAM5 hindcast uses a long-term continuous integration approach, with no nudging. Christensen, O. B., M. Drews, J. H. Christensen, K. Dethloff, K. Ketelsen, I. Hebestadt, and A. Rinke, 2007: The HIRHAM regional climate model, Version 5 (beta), Danish Climate Centre, Danish Meteorological Institute, Danish Meteorological Institute, Technical Report. ISSN 1399-1388 Walters, D., I. Boutle, M. Brooks, T. Melvin, R. Stratton, S. Vosper, H. Wells, K. Williams, N. Wood, T. Allen, A. Bushell, D. Copsey, P. Earnshaw, J. Edwards, M. Gross, S. Hardiman, C. Harris, J. Heming, N. Klingaman, R. Levine, J. Manners, G. Martin, S. Milton, M. Mittermaier, C. Morcrette, T. Riddick, M. Roberts, C. Sanchez, P. Selwood, A. Stirling, C. Smith, D. Suri, W. Tennant, P. L. Vidale, J. Wilkinson, M. Willett, S. Woolnough, and P. Xavier, 2017: The Met Office Unified Model Global Atmosphere 6.0/6.1 and JULES Global Land 6.0/6.1 configurations. Geosci. Model. Dev., 10, 1487-1520, https://doi.org/10.5194/gmd-10-1487-2017. Data quality: Summer daily maximum temperatures derived from both the MetUM and HIRHAM5 hindcasts were compared in a statistical analysis with observations from twenty weather stations situated either on or close to Antarctic ice shelves. This comparison showed that the MetUM simulated temperatures were characterised by a) a cold bias for fifteen out of the twenty stations, which for ten of the stations was less than 1 K, b) a root-mean-square-error of 2-3 K, and c) a correlation from 0.62-0.91. The HIRHAM5 summer daily maximum temperatures typically have a larger cold bias, larger root-mean-square-error, and lower correlation than the MetUM results. The relatively good performance of the MetUM (and to a lesser extent HIRHAM5) suggests that daily maximum temperatures over Antarctic ice shelves derived from these model outputs are broadly representative of actual conditions. asNeeded completed