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).

Identification info

Metadata Language: English (en)

Dataset Reference Date (): 2016-04-15T14:38:14

Dataset Reference Date (): 2016-04-15T14:38:14

Identifier: http://catalogue.ceda.ac.uk/uuid/a7b87a912c494c03b4d2fa5ab8479d1c

Identifier: Centre for Environmental Data Analysis (CEDA) / a7b87a912c494c03b4d2fa5ab8479d1c

Unavailable - Sørensen, Louise ( author )

Unavailable - Simonsen, Sebastian ( author )

Unavailable - Meister, Rakia ( author )

Unavailable - Forsberg, Rene ( author )

Unavailable - Khvorostovsky, Kirill ( author )

Centre for Environmental Data Analysis (CEDA) - custodian

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

Centre for Environmental Data Analysis (CEDA) - distributor

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

Centre for Environmental Data Analysis (CEDA) - point_of_contact

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

Centre for Environmental Data Analysis (CEDA) - publisher

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

Maintenance and update frequency: unknown

Update scope: dataset

Keywords

DTU Space
ice sheets
ice sheets
DTU Space
CryoSat-2
Envisat
ERS-1
ERS-2
SIRAL
RA
RA-2
Greenland Ice Sheet
ESA
CCI

GEMET - INSPIRE themes, version 1.0 ()

orthoimagery

Limitations on Public Access: otherRestrictions

Other constraints: Public data: access to these data is available to both registered and non-registered users.

Use constraints: otherRestrictions

Other constraints: Use of these data is covered by the following licence: http://licences.ceda.ac.uk/image/data_access_condition/esacci_icesheets_greenland_terms_and_conditions.pdf . When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.

Spatial representation type: grid

Topic category

Imagery base maps earth cover

Begin date: 1992-01-01T00:00:00

End date: 2014-12-31T00:00:00

Code: WGS 84

Distribution Information

Data format

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

()

Resource Locator: CEDA Data Catalogue Page
Detail and access information for the resource

Resource Locator: DOWNLOAD
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Resource Locator: The ESA Greenland Ice Sheet CCI Project
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Resource Locator: ESA Climate Change Initiative website
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Resource Locator: 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.

Resource Locator: 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.

Resource Locator: Greenland Surface Elevation Change Dataset Metadata pdf
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Resource Locator: Sample Image
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Resource Locator: Product User Guide
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Resource Locator: CEDA Data Catalogue Page
Detail and access information for the resource

Resource Locator: DOWNLOAD
Download Data

Resource Locator: The ESA Greenland Ice Sheet CCI Project
No further details.

Resource Locator: ESA Climate Change Initiative website
No further details.

Resource Locator: 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.

Resource Locator: 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.

Resource Locator: Greenland Surface Elevation Change Dataset Metadata pdf
No further details.

Resource Locator: Sample Image
No further details.

Resource Locator: Product User Guide
No further details.

Quality Scope: dataset

Report

Dataset Reference Date (): 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.

Metadata

File identifier: a7b87a912c494c03b4d2fa5ab8479d1c XML

Metadata Language: English (en)

Character set: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646

Parent identifier: ESA Greenland Ice Sheet Climate Change Initiative (Greenland Ice Sheet CCI) Dataset Collection 394464f9c39445d3b6445d8e305841d7

Resource type: dataset

Metadata Date: 2023-11-07T00:36:08

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Centre for Environmental Data Analysis (CEDA)

Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom

01235446432

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