C3S Globally Gridded Terrestrial Water Storage Anomalies

Dataset

DOI

GRACE/GRACE-FO-derived time series of gridded terrestrial water storage anomalies with respect to the mean over the period 2003-01 - 2022-12.

The product is based on monthly COST-G RL02 GRACE/GRACE-FO Level-2B Products ( Meyer et al., 2025, doi: 10.5880/COST-G.ICGEM_02_L2) provided at 0.5° latitude-longitude grids as defined over all continental regions. The TWS anomaly grids are provided in NetCDF format, containing three different variables:

1) 'twsa': gravity-based terrestrial water storage anomaly
2) 'std_twsa': gravity-based terrestrial water storage anomaly standard deviations
3) 'flag_filter': Flag indicating the filter strength

File History:

The Copernicus Climate Change Service (C3S) groups its datasets into Climate Data Records (CDRs), representing major version releases, and Intermediate Climate Data Records (ICDRs), which only extend the existing data and do not involve any processing changes.

12 September 2025:
CDR: C3S_TWSA_GLOBAL_MONTHLY_200204_202503_v1.0.nc

Data set covering April 2002 to March 2025
5 January 2026:

ICDR: C3S_TWSA_GLOBAL_MONTHLY_200204_202509_v1.0.nc
Data set covering April 2002 to September 2025

Identifier
DOI	https://doi.org/10.5880/GFZ.C3S_TWSA_v1.0
Related Identifier	IsDerivedFrom https://doi.org/10.5880/COST-G.ICGEM_02_L2
Related Identifier	IsDocumentedBy https://confluence.ecmwf.int/pages/viewpage.action?pageId=488075846
Related Identifier	IsDocumentedBy https://doi.org/10.5194/essd-17-611-2025
Related Identifier	IsVariantFormOf https://doi.org/10.5880/COST-G.GRAVIS_02_L3_TWS
Related Identifier	IsVariantFormOf https://doi.org/10.5880/GFZ.GRAVIS_06_L3_TWS
Metadata Access	http://doidb.wdc-terra.org/oaip/oai?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:doidb.wdc-terra.org:8624

Provenance
Creator	Boergens, Eva ; Dahle, Christoph ; Haas, Julian ; Dobslaw, Henryk ; Flechtner, Frank ; Güntner, Andreas
Publisher	GFZ Data Services
Contributor	Boergens, Eva
Publication Year	2025
Funding Reference	Copernicus Climate Change Service C3S 313c Lot 4 Terrestrial Water Storage; European Earth Observation Programme (Copernicus) ECMWF/COPERNICUS/2024/C3S2_313c_EODC Terrestrial Water Storage
Rights	Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/legalcode
OpenAccess	true
Contact	Boergens, Eva (GFZ Helmholtz Centre for Geosciences)

Representation
Resource Type	Dataset
Version	1
Discipline	Geosciences
Spatial Coverage	(-180.000W, -90.000S, 180.000E, 90.000N); Geospatial lon resolution: 0.5 degrees Geospatial lat resolution: 0.5 degrees time coverage resolution: 1 month
Temporal Coverage Begin	2002-04-18T00:00:00Z
Temporal Coverage End	2025-03-16T00:00:00Z