GRACE/GRACE-FO Level-3 products based on COST-G RL01 Level-2B products (Dahle & Murböck, 2020) representing ice-mass changes for the Antarctic Ice Sheet (AIS) and the Greenland Ice Sheet (GIS). The ice-mass changes are provided both as basin average product and as gridded product.
Basin-average ice-mass changes are obtained using the inversion procedure based on a forward modelling approach as described in Sasgen et al. (2013) for the AIS and Sasgen et al. (2012) for the GIS.
Gridded ice-mass changes are provided at polar-stereographic grids with a grid spacing of 50 x 50 km^2. The applied algorithm is based on tailored sensitivity kernels (Groh & Horwath, 2016), and has also been used to generate gravimetric mass balance products within the ESA Climate Change Initiative (CCI) projects for the AIS and the GIS.
These Level-3 products are visualized at GFZ's web portal GravIS (https://gravis.gfz.de).
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Version History:
21 April 2023:
Release of Version 0003. This is an update of Version 0002 of the same data set (see changelog).
15 June 2020:
Initial release of the data. Note that the initial version number is 0002 in order to reflect the consistent data processing of this data set and Version 0002 of the data set Sasgen et al. (2019, https://doi.org/10.5880/GFZ.GRAVIS_06_L3_ICE).
All changes and updates are documented in the changelog available via the data download section. Previously released versions of this data set are available in the "old-version" subfolder in the data download folder.
GRACE/GRACE-FO Level-3 product based on COST-G RL02 Level-2B products (Dahle & Murböck, 2025) representing ice-mass changes for the Antarctic Ice Sheet (AIS) and the Greenland Ice Sheet (GIS). The ice-mass changes are provided both as basin average product and as gridded product.
Basin-average ice-mass changes are obtained using the inversion procedure based on a forward modelling approach as described in Sasgen et al. (2013) for the AIS and Sasgen et al. (2012) for the GIS.
Gridded ice-mass changes are provided at polar-stereographic grids with a grid spacing of 50 x 50 km^2. The applied algorithm is based on tailored sensitivity kernels (Döhne et al., 2023; Groh & Horwath, 2021), and has also been used to generate gravimetric mass balance products within the ESA Climate Change Initiative (CCI) projects for the AIS and the GIS.
These Level-3 products are visualized at GFZ's web portal GravIS (https://gravis.gfz.de).
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Version History:
13 March 2026:
Initial release of the data (Version 0001).
GRACE/GRACE-FO Level-3 products based on GFZ RL06 Level-2B products (Dahle & Murböck, 2019) representing ice-mass changes for the Antarctic Ice Sheet (AIS) and the Greenland Ice Sheet (GIS). The ice-mass changes are provided both as basin average product and as gridded product.
Basin-average ice-mass changes are obtained using the inversion procedure based on a forward modelling approach as described in Sasgen et al. (2013) for the AIS and Sasgen et al. (2012) for the GIS.
Gridded ice-mass changes are provided at polar-stereographic grids with a grid spacing of 50 x 50 km^2. The applied algorithm is based on tailored sensitivity kernels (Döhne et al., 2023; Groh & Horwath, 2021), and has also been used to generate gravimetric mass balance products within the ESA Climate Change Initiative (CCI) projects for the AIS and the GIS.
These Level-3 products are visualized at GFZ's web portal GravIS (https://gravis.gfz.de).
---------------------------------------------------------------------------------------------
Version History:
13 March 2026:
Release of Version 0005. This is an update of Version 0004 of the same data set (see changelog).
16 January 2025:
Release of Version 0004. This is an update of Version 0003 of the same data set (see changelog).
21 April 2023:
Release of Version 0003. This is an update of Version 0002 of the same data set (see changelog).
09 June 2020:
Release of Version 0002. This is an update of Version 0001 of the same data set (see changelog).
All changes and updates are documented in the changelog available via the data download section. Previously released versions of this data set are available in the "old_versions" subfolder of the data download folder.
SELF II uses the determination of absolute sea level and of its variations to study the present interactions as well as of those of the recent past among the ocean, the atmosphere and the Earth's crust and to develop appropriate models to assess future aspects. The main topics are: - to improve the long-term monitoring of sea-level variability by applying the most advanced geodetic techniques, including satellite altimetry and airborne laser - to study past sea levels in the Mediterranean in order to better understand the current processes - to study the effects of the atmosphere/ocean interaction and crustal movements on coastal sea levels in order to provide a bases for hazard assessment. Particular objectives of the project are: - a first assessment of rates of vertical movements of the tide gauge benchmarks - optimize the GPS and gravity observation strategies for a cost-effective determination of height changes, in particular by deploying water vapor radiometers - a detailed assessment of the quality and usefulness of the available tide gauge and sea level data - compute the temporal (seasonal and interannual) and the spatial variations of the sea-surface topography of the Mediterranean and Black Sea from ERS-1, ERS-2, TOPEX satellite altimetry and airborne laser profiling.