This dataset provides the Gravitational Mass Balance (GMB) product derived from the GRACE satellite instrument, by TU Dresden. The data consists of two products, a mass change time series for the Greenland Ice Sheet and individual basins, and mass trend grids for 5-year periods.
The mass change time series contains the mass change (with respect to a chosen reference month) for all of the Greenland Ice Sheet and each individual drainage basin. For each month (defined by a decimal year) a mass change in Gt and its associated error (also in Gt) is provided. The mass trend grid product is given in units of mm water equivalent per year.
Mass balance is an important variable to understand glacial thinning and ablation rates to enable mapping glacier area change. The time series allows the longer term comparison of trends whereas the mass trend grids provide a yearly snapshot which can be further analysed and compared across the data set.
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Public data: access to these data is available to both registered and non-registered users.
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.
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.
Mass trend grids are in NetCDF format. Time series are in ASCII and png format.
- var_id: crs
- long_name: end of time span
- var_id: end_time
- names: end of time span
- standard_name: tendency_of_change_in_land_ice_amount
- units: kg m-2 yr-1
- long_name: mass trend for time span
- var_id: GMB_trend
- names: mass trend for time span, tendency_of_change_in_land_ice_amount
- long_name: start of time span
- var_id: start_time
- names: start of time span
- long_name: average time for time slice
- var_id: t
- standard_name: time
- names: time, average time for time slice
- standard_name: latitude
- var_id: latitude
- long_name: latitude
- units: degrees_north
- names: latitude
- units: degrees_east
- standard_name: longitude
- long_name: longitude
- var_id: longitude
- names: longitude