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NASA GRACE Project

The monthly land mass grids contain water mass anomalies given as equivalent water thickness derived from GRACE & GRACE-FO time-variable gravity observations during the specified timespan, and relative to the specified time-mean reference period. The Equivalent water thickness represents the total terrestrial water storage anomalies from soil moisture, snow, surface water (incl. rivers, lakes, reservoirs etc.), as well as groundwater and aquifers. A glacial isostatic adjustment (GIA) correction

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Source details

Licence: [Creative Commons BY 4.0](https://creativecommons.org/licenses/by/4.0/)

Evidence quality: 33.1

Listed in aws-odr public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata checked: 2026-10-14T13:20:00.000Z

What's in it

Data offered docs-verified
Terrestrial water storage anomalies (equivalent water thickness, monthly land mass grids) · Monthly ocean bottom pressure anomaly grids (equivalent water thickness) · GRACE atmosphere and ocean de-aliasing (GRACE_AOD1B_GRAV_GFZ_RL06) spherical harmonics, 6-hour sampling · GRACE/GRACE-FO Level-2 static gravity field spherical harmonics (CSR, GFZ, JPL; RL06) · GRACE Level-2 GAC gravity field products (CSR, GFZ, JPL; RL06) · GRACE Level-1B data products (K-band ranging, accelerometer, star camera, GPS, housekeeping)
Coverage llm-inferred
Global
Resolution docs-verified
Monthly grids (temporal); spatial resolution not stated in docs
Formats docs-verified
ASCII · netCDF · GeoTIFF
Access llm-inferred
Open data, no authentication; licence Creative Commons BY 4.0 (per registry entry)

Useful for

Use cases llm-inferred
Regional water balance context for hydrological model calibration checks · Groundwater and soil-moisture storage trend context for drought risk screening · Large-scale water storage baseline for catchment strategy and climate-change reports
Audience llm-inferred
hydrologists · water resources engineers · environmental consultants · GIS analysts

Limitations

Constraints docs-verified
Several related products (Level-1B, Level-2 gravity field, GAC) are marked for expert use only · Grids are anomalies relative to a time-mean reference period, not absolute storage values

Evidence

Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.