a7b87a912c494c03b4d2fa5ab8479d1c 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 2026-04-27T02:07:03 UK GEMINI 2.3 WGS 84 ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Greenland Surface Elevation Change 1992-2014, v1.2 2016-04-15T14:38:14 publication 2016-04-15T14:38:14 creation https://catalogue.ceda.ac.uk/uuid/a7b87a912c494c03b4d2fa5ab8479d1c a7b87a912c494c03b4d2fa5ab8479d1c 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 satellite (ERS‐1, ERS‐2, Envisat and Cryosat) radar altimetry. The ice mask is based on the GEUS/GST land/ice/ocean mask provided as part of national mapping projects, and based on 1980’s aerial photography. The data from ERS and Envisat are based on a 5‐year running average, using combined algorithms of repeat‐track (RT), along‐track (AT) or cross‐over (XO) algorithms, and include propagated error estimates. It is important to note that different processing algorithms were applied to the ERS‐1, ERS‐2, Envisat and CryoSat data; for details see the Product User Guide (PUG), available on the CCI website and in the documentation section here. For ERS‐1, the radar data were processed using a cross‐over algorithm (XO) only. For ERS‐2 data and Envisat data in repeat mode, a combination of RT and XO algorithms was applied, followed by filtering. For across‐mission (i.e. ERS‐2‐Envisat) combinations, and for Envisat operating in a drifting orbit, an AT and XO combination was applied (the difference between RT and AT algorithms is that AT use reference tracks and searches for data in the vicinity of this track). For CryoSat data a binning/gridding and plane fit method has been applied, following by weak filtering (0.05 degree resolution). Sørensen, Louise Unavailable author Unavailable author Simonsen, Sebastian Unavailable author Unavailable author Meister, Rakia Unavailable author Unavailable author Forsberg, Rene Unavailable author Unavailable author Khvorostovsky, Kirill Unavailable author Unavailable 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 unknown dataset DTU Space ice sheets ice sheets DTU Space CryoSat-2 Envisat ERS-1 ERS-2 SIRAL RA RA-2 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 1992-01-01T00:00:00 2014-12-31T00:00:00 Files are provided in both NetCDF (.nc) and ASCII Gravsoft (.gri) format, as well as .png images. In ascii gravsoft format the data are stored row‐wise in E‐W rows, from N to S, headed by a two‐line label defining coordinate limits and projection. This format is the simplest possible ASCII grid format. Unknown values are flagged by 9999. The grid label for the CCI data is: ‐3350000. ‐650000. ‐650000. 850000. 5000. 5000. (this is N1, N2, E1, E2, dN, DE in meter) ‐70 ‐45 (minus reference latitude, central meridian in degrees) The CCI data grid contains a total 541 x 301 points. First data value in file is thus the NW cormer (N = ‐650 km,E = ‐650 km) and last value the SE corner (N = ‐3350 km, E = 850 km). Stereographic projections have by default (0,0) at the North Pole. The data use a Polar stereographic projection, WGS84 ellipsoid, with a reference latitude of 70N, and central meridian of 45W 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/a7b87a912c494c03b4d2fa5ab8479d1c 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/v1.2 DOWNLOAD Download Data download http://www.esa-icesheets-cci.org/ The ESA Greenland Ice Sheet CCI Project No further details. information https://climate.esa.int/ ESA Climate Change Initiative website No further details. information http://www.sciencedirect.com/science/article/pii/S0034425714005148 Sørensen, S., Simonsen, S., Meister, R., Forsberg, R., Levinsen, J. and Flament, T. (2015): Envisat‐derived elevation changes of the Greenland Ice Sheet, and a comparison with ICESat results in the accumulation area, Remote Sensing of the Environment, 04/2015; 160. DOI: 10.1016/j.rse.2014.12.022. No further details. information http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5970115&filter%3DAND%28p_IS_Number%3A6117787%29 Khvorostovsky, K.S. (2012) Merging and analysis of elevation time series over Greenland ice sheet from satellite radar altimetry, IEEE Transactions on Geoscience and Remote Sensing, 50 (1), art. no. 5970115, pp. 23‐36. No further details. information http://data.ceda.ac.uk/neodc/esacci/ice_sheets_greenland/docs/greenland_sec_2015_v1.2_meta.pdf Greenland Surface Elevation Change Dataset Metadata pdf No further details. information http://data.ceda.ac.uk/neodc/esacci/ice_sheets_greenland/metadata/sample_images/sec_2010_2014_cs2.png Sample Image No further details. information http://esa-icesheets-greenland-cci.org/index.php?q=webfm_send/165 Product User Guide 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.