0470e96f2d8245549ef2ba81842cdfd8 English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 394464f9c39445d3b6445d8e305841d7 dataset Centre for Environmental Data Analysis (CEDA) 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointOfContact 2026-04-15T02:17:21 UK GEMINI 2.3 WGS 84 ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Greenland Surface Elevation Change grid from SARAL-AltiKa for 2013-2017, v0.1 2018-11-22T17:59:03 publication 2018-11-22T17:59:03 creation https://catalogue.ceda.ac.uk/uuid/0470e96f2d8245549ef2ba81842cdfd8 0470e96f2d8245549ef2ba81842cdfd8 Centre for Environmental Data Analysis (CEDA) This data set is part of the ESA Greenland Ice sheet CCI project. The data set provides surface elevation changes (SEC) for the Greenland Ice sheet derived from SARAL-AltiKa for 2013-2017. This new experimental product of surface elevation change is based on data from the AltiKa-instrument onboard the France (CNES)/Indian (ISRO) SARAL satellite. The AktiKa altimeter utilizes Ka-band radar signals, which have less penetration in the upper snow. However, the surface slope and roughness has an imprint in the derived signal and the new product is only available for the flatter central parts of the Greenland ice sheet. The corresponding SEC grid from Cryosat-2 is included for comparison. The algorithm used to devive the product is described in the paper “Implications of changing scattering properties on the Greenland ice sheet volume change from Cryosat-2 altimetry” by S.B. Simonsen and L.S. Sørensen, Remote Sensing of the Environment, 190,pp.207-216, doi:10.1016/j.rse.2016.12.012. The approach used here corresponds to Least Squares Method (LSM) 5 described in the paper, in which the slope within each grid cell is accounted for by subtraction of the GIMP DEM; the data are corrected for both backscatter and leading edge width; and the LSM is solved at 1 km grid resolution (2 km search radius) and averaged in the post-processing to 5 km grid resolution and with a correlation length of 20 km. ESA Greenland Ice Sheet CCI project team author unknown author Centre for Environmental Data Analysis (CEDA) custodian 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk custodian Centre for Environmental Data Analysis (CEDA) distributor 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor Centre for Environmental Data Analysis (CEDA) point_of_contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointofContact Centre for Environmental Data Analysis (CEDA) publisher 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk publisher notPlanned dataset ice sheets ice sheets CryoSat-2 SARAL AltiKa SIRAL Greenland Ice Sheet ESA CCI orthoimagery theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication otherRestrictions Public data: access to these data is available to both registered and non-registered users. otherRestrictions Under the following licence https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_icesheets_greenland_terms_and_conditions.pdf, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. grid English imageryBaseMapsEarthCover -80.0 -10.0 60.0 90.0 2013-03-31T23:00:00 2017-03-31T22:59:59 Version 0.1 of the product contains three files: 1) NetCDF file containing the surface elevation change grids from AltiKa and from Cryosat-2 (for comparison) for 2013-2017 and their associated errors 2) PNG plot of the surface elevation change from AltiKa 3) PNG plot of the surface elevation change from Cryosat-2 Centre for Environmental Data Analysis (CEDA) Data Center Contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor https://catalogue.ceda.ac.uk/uuid/0470e96f2d8245549ef2ba81842cdfd8 CEDA Data Catalogue Page Detail and access information for the resource information http://data.ceda.ac.uk/neodc/esacci/ice_sheets_greenland/data/greenland_surface_elevation_change/saral-altika/v0.1/ DOWNLOAD Download Data download http://www.esa-icesheets-greenland-cci.org/?q=webfm_send/165 Product User Guide No further details. information http://data.ceda.ac.uk//neodc/esacci/ice_sheets_greenland/metadata/sample_images/sec_AltiKa_2013-2017_v0.1.png Sample Image No further details. information https://climate.esa.int/projects/ice-sheets-greenland/ ESA CCI Greenland Ice Sheet project website No further details. information https://climate.esa.int/ ESA Climate Change Initiative website No further details. information dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Data were processed by the ESA CCI Greenland Ice Sheet project team and supplied to CEDA in the context of the ESA CCI Open Data Portal Project.