NERC Data Catalogue Service
ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Greenland Surface Elevation Change 1992-2014, v1.2
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).
Simple
- Date (Publication)
- 2016-04-15T14:38:14
- Date (Creation)
- 2016-04-15T14:38:14
- Identifier
- Centre for Environmental Data Analysis (CEDA) / a7b87a912c494c03b4d2fa5ab8479d1c
- Maintenance and update frequency
- unknown Unknown
- Update scope
- dataset Dataset
- Keywords
- GEMET - INSPIRE themes, version 1.0
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- orthoimagery
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- Public data: access to these data is available to both registered and non-registered users.
- Use constraints
- otherRestrictions Other restrictions
- Spatial representation type
- grid Grid
- Metadata language
- EnglishEnglish
- Topic category
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- Imagery base maps earth cover
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- Begin date
- 1992-01-01T00:00:00
- End date
- 2014-12-31T00:00:00
- Unique resource identifier
- WGS 84
- Distribution format
-
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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
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- OnLine resource
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CEDA Data Catalogue Page
Detail and access information for the resource
- OnLine resource
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DOWNLOAD
Download Data
- OnLine resource
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The ESA Greenland Ice Sheet CCI Project
No further details.
- OnLine resource
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ESA Climate Change Initiative website
No further details.
- OnLine resource
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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.
- OnLine resource
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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.
- OnLine resource
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Greenland Surface Elevation Change Dataset Metadata pdf
No further details.
- OnLine resource
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Sample Image
No further details.
- OnLine resource
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Product User Guide
No further details.
- Hierarchy level
- dataset Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
- 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.
- File identifier
- a7b87a912c494c03b4d2fa5ab8479d1c XML
- Metadata language
- EnglishEnglish
- Character set
- 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 UTF8
- Parent identifier
- ESA Greenland Ice Sheet Climate Change Initiative (Greenland Ice Sheet CCI) Dataset Collection 394464f9c39445d3b6445d8e305841d7
- Hierarchy level
- dataset Dataset
- Date stamp
- 2025-11-16T03:06:46
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
Overviews
Spatial extent
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