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COST-G GravIS RL01 Continental Water Storage Anomalies

GRACE/GRACE-FO Level-3 product based on COST-G RL01 Level-2B products (Dahle & Murböck, 2020) representing Terrestrial Water Storage (TWS) anomalies provided at 1° latitude-longitude grids as defined over all continental regions except Greenland and Antarctica. The TWS anomaly grids are provided in NetCDF format divided into yearly batches. The files each contain four different variables: 1) 'tws': gravity-based TWS 2) 'std_tws': gravity-based TWS uncertainties 3) 'leakage': spatial leakage contained in TWS 4) 'model_atmosphere': background model atmospheric mass These Level-3 products are visualized at GFZ's web portal GravIS (https://gravis.gfz-potsdam.de). --------------------------------------------------------------------------------------------- Version History: 21 April 2023: Release of Version 0005. This is an update of Version 0004 of the same data set (see changelog). 9 December 2021: Release of Version 0004. This is an update of Version 0003 of the same data set (see changelog). 9 September 2020: 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 Boergens et al. (2019, https://doi.org/10.5880/GFZ.GRAVIS_06_L3_TWS). 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.

GFZ GravIS RL06 Continental Water Storage Anomalies

GRACE/GRACE-FO Level-3 product based on GFZ RL06 Level-2B products (Dahle & Murböck, 2019) representing Terrestrial Water Storage (TWS) anomalies provided at 1° latitude-longitude grids as defined over all continental regions except Greenland and Antarctica. The TWS anomaly grids are provided in NetCDF format containing four different variables: 1) 'tws': gravity-based TWS 2) 'std_tws': gravity-based TWS uncertainties 3) 'leakage': spatial leakage contained in TWS 4) 'model_atmosphere': background model atmospheric mass These Level-3 products are visualized at GFZ's web portal GravIS (https://gravis.gfz.de). --------------------------------------------------------------------------------------------- Version History: 16 January 2025: Release of Version 0006. This is an update of Version 0005 of the same data set (see changelog). 21 April 2023: Release of Version 0005. This is an update of Version 0004 of the same data set (see changelog). 9 December 2021: Release of Version 0004. This is an update of Version 0003 of the same data set (see changelog). 9 September 2020: Release of Version 0003. This is an update of Version 0002 of the same data set (see changelog). 9 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 in the data download folder.

Global Multi-Resolution Land Fraction and Land–Ocean Masks Derived from ESA CCI Water Bodies v4.0

The dataset provides a set of 8 land ocean masks as NetCDF files based on the maps provided by the datasets ESA CCI Water Bodies - v4.0, Ocean-Map-150m-P13Y-2000-v4.0. The masks come as regular lon/lat grids in 0.1°, 0.25°, 0.5° and 1° spatial resolution, each as a version with and without Greenland and the antarctic regions (anything south of 60° S). The data fields of the individual datasets comprise of a) a field with information on the fraction of land in a grid cell, defined by the number of 150m cells of the source dataset lying within a target grid cell, b) a field with a flag (1 or 0) if a a grid cell contains more than 50% land area or not, and c) a field with a flag (1 or 0) if a grid cell contains any land at all. The dataset was generated in the course of the project "Global Gravity-based Groundwater Product (G3P)" to facilitate data production on a regular grid and to mask out oceans. G3P was funded by the EU Horizon 2020 programme in response to the call LC-SPACE-04-EO-2019-2020 “Copernicus evolution – Research activities in support of cross-cutting applications between Copernicus services” under grant agreement No. 870353.

COST-G GravIS RL01 Ocean Bottom Pressure Anomalies

GRACE/GRACE-FO Level-3 product based on COST-G RL01 Level-2B products (Dahle & Murböck, 2020) representing Ocean Bottom Pressure (OBP) variations provided at 1° latitude-longitude grids as defined over ocean areas. The OBP grids are provided in NetCDF format divided into yearly batches. The files each contain seven different variables: 1) 'barslv': gravity-based barystatic sea-level pressure 2) 'std_barslv': gravity-based barystatic sea-level pressure uncertainties 3) 'resobp': gravity-based residual ocean circulation pressure resobp 4) 'std_resobp': gravity-based residual ocean circulation pressure uncertainties 5) 'leakage': apparent gravity-based bottom pressure due to continental leakage 6) 'model_ocean': background-model ocean circulation pressure 7) 'model_atmosphere': background-model atmospheric surface pressure These Level-3 products are visualized at GFZ's web portal GravIS (http://gravis.gfz-potsdam.de). --------------------------------------------------------------------------------------------- Version History: 21 April 2023: Release of Version 0005. This is an update of Version 0004 of the same data set (see changelog). 9 December 2021: Release of Version 0004. This is an update of Version 0003 of the same data set (see changelog). 9 September 2020: 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 Boergens et al. (2019, https://doi.org/10.5880/GFZ.GRAVIS_06_L3_OBP). 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.

Surface Water Storage and Groundwater Storage from Satellite Data in the Northern East-African Rift Region

The data set provides surface water storage (SWS) and groundwater storage (GWS) data for the Northern East African Rift region. SWS is estimated from a combination of lake water levels observed with satellite altimetry and water surface area derived from the water occurrence maps. The truncated pyramid formula estimates water volume change from these two data sets. The volume change is then converted to surface water storage and uniformly distributed over the lake surface, leading to SWS. To match the spatial resolution of SWS with the spatial resolution of terrestrial water storage (TWS), the resulting maps are spatially Gaussian filtered, half-width 250km. TWS, as observed with the GRACE and GRACE-FO satellite mission, monitors the sum of changes in the water storage compartments SWS, GWS, snow and ice, and root-zone soil moisture (RZSM). Thus, to estimate GWS for this data set, the water storage compartments are subtracted from TWS. Here, we neglect snow and ice. The temporal coverage of the data is from April 2020 to May 2023.

GFZ GravIS RL06 Ocean Bottom Pressure Anomalies

GRACE/GRACE-FO Level-3 product based on GFZ RL06 Level-2B products (Dahle & Murböck, 2019) representing Ocean Bottom Pressure (OBP) variations provided at 1° latitude-longitude grids as defined over ocean areas. The OBP grids are provided in NetCDF format containing seven different variables: 1) 'barslv': gravity-based barystatic sea-level pressure 2) 'std_barslv': gravity-based barystatic sea-level pressure uncertainties 3) 'resobp': gravity-based residual ocean circulation pressure resobp 4) 'std_resobp': gravity-based residual ocean circulation pressure uncertainties 5) 'leakage': apparent gravity-based bottom pressure due to continental leakage 6) 'model_ocean': background-model ocean circulation pressure 7) 'model_atmosphere': background-model atmospheric surface pressure These Level-3 products are visualized at GFZ's web portal GravIS (https://gravis.gfz.de). --------------------------------------------------------------------------------------------- Version History: 16 January 2025: Release of Version 0006. This is an update of Version 0005 of the same data set (see changelog). 21 April 2023: Release of Version 0005. This is an update of Version 0004 of the same data set (see changelog). 9 December 2021: Release of Version 0004. This is an update of Version 0003 of the same data set (see changelog). 9 September 2020: Release of Version 0003. This is an update of Version 0002 of the same data set (see changelog). 9 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 in the data download folder.

GFZ/ITSG Level-3 Products Terrestrial Water Storage Anomalies

GRACE/GRACE-FO Level-3 product based on GFZ RL06 Level-2B products (Dahle & Murböck, 2019) and ITSG-Grace2018/ITSG-Grace_operational VDK3 filtered (citation) representing Terrestrial Water Storage (TWS) anomalies provided at 1° latitude-longitude grids as defined over all continental regions except Greenland and Antarctica. The TWS anomaly grids are provided in NetCDF format. The files each contain two different variables: 1) 'tws': gravity-based TWS 2) 'std_tws': gravity-based TWS uncertainties This data set is basis of Boergens and Kvas (2021) and have been used in Boergens et al. (2021) to produce regional time series and their uncertainties, which can be reproduced with the code provided by Boergens (2021).

COST-G GravIS RL02 Terrestrial Water Storage Anomalies

GRACE/GRACE-FO Level-3 product based on COST-G RL02 Level-2B products (Dahle & Murböck, 2025) representing Terrestrial Water Storage (TWS) anomalies provided at 1° latitude-longitude grids as defined over all continental regions except Greenland and Antarctica. The TWS anomaly grids are provided in NetCDF format containing four different variables: 1) 'tws': gravity-based TWS 2) 'std_tws': gravity-based TWS standard deviations 3) 'leakage': spatial leakage contained in 'tws' 4) 'model_atmosphere': background model atmospheric mass These Level-3 products are visualized at GFZ's web portal GravIS (https://gravis.gfz.de). --------------------------------------------------------------------------------------------- Version History: 14 August 2025: Initial release of the data (Version 0001).

Python Package Regional TWS Uncertainty

Python tool box, which allows the user to calculate mean TWS time series, their uncertainties, and regional covariance matrices for arbitrary regions. This tool box has been used to produce the results presented in Boergens et al. (2021) based on the TWS data of Boergens and Kvas (2021).

COST-G GravIS RL01 Ice-Mass Change Products

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). --------------------------------------------------------------------------------------------- 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.

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