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ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Greenland Surface Elevation Change grid from SARAL-AltiKa for 2013-2017, v0.1

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.

Simple

Date (Publication)
2018-11-22T17:59:03
Date (Creation)
2018-11-22T17:59:03
Identifier
https://catalogue.ceda.ac.uk/uuid/0470e96f2d8245549ef2ba81842cdfd8
Identifier
Centre for Environmental Data Analysis (CEDA) / 0470e96f2d8245549ef2ba81842cdfd8
Author
  ESA Greenland Ice Sheet CCI project team - author
Custodian
  Centre for Environmental Data Analysis (CEDA) - custodian
Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom
01235446432
Distributor
  Centre for Environmental Data Analysis (CEDA) - distributor
Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom
01235446432
pointofContact
  Centre for Environmental Data Analysis (CEDA) - point_of_contact
Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom
01235446432
Publisher
  Centre for Environmental Data Analysis (CEDA) - publisher
Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom
01235446432
Maintenance and update frequency
notPlanned Not planned
Update scope
dataset Dataset
Keywords
  • ice sheets
  • ice sheets
  • CryoSat-2
  • SARAL
  • AltiKa
  • SIRAL
  • Greenland Ice Sheet
  • ESA
  • CCI
GEMET - INSPIRE themes, version 1.0
  • 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
Other constraints
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.
Spatial representation type
grid Grid
Metadata language
EnglishEnglish
Topic category
  • Imagery base maps earth cover
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W
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Begin date
2013-03-31T23:00:00
End date
2017-03-31T22:59:59
Unique resource identifier
WGS 84
Distribution format
  • 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

    ()

Distributor
  Centre for Environmental Data Analysis (CEDA) - Data Center Contact
Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom
01235446432
OnLine resource
CEDA Data Catalogue Page

Detail and access information for the resource

OnLine resource
DOWNLOAD

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OnLine resource
Product User Guide

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OnLine resource
Sample Image

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OnLine resource
ESA CCI Greenland Ice Sheet project website

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OnLine resource
ESA Climate Change Initiative website

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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
0470e96f2d8245549ef2ba81842cdfd8 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
2025-11-15T03:16:22
Metadata standard name
UK GEMINI
Metadata standard version
2.3
Point of contact
  Centre for Environmental Data Analysis (CEDA)
Rutherford Appleton Laboratory , Harwell , Oxon , OX11 0QX , United Kingdom
01235446432
 
 

Overviews

Spatial extent

N
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E
W
thumbnail


Keywords

GEMET - INSPIRE themes, version 1.0
orthoimagery

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