GLDAS_CLSM025_DA1_D_EP: Daily Land Surface Hydrology with GRACE Data Assimilation

24 land surface fields are provided in this daily dataset from NASA's Global Land Data Assimilation System. The data, produced by the National Aeronautics and Space Administration, covers the period from February 1, 2003 to present at a 0.25 x 0.25 degree spatial resolution. It simulates terrestrial water storage by assimilating GRACE satellite observations into the Catchment Land Surface Model.

Use Cases

• Modeling terrestrial water storage anomalies based on the assimilation of GRACE total water anomaly observations.
• Analyzing long-term trends in land surface hydrology based on the daily data spanning from 2003 to present.
• Validating other hydrological or climate models based on the 24 assimilated land surface fields.
• Studying the impact of meteorological forcing from ECMWF on soil moisture and related variables.

Strengths

• Data spans from February 2003 to present, providing a long-term record for analysis.
• Assimilates GRACE satellite observations, likely improving the accuracy of total terrestrial water storage estimates.
• Provides 24 distinct land surface fields for a comprehensive view of surface conditions.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The dataset is an 'Early Product' with a latency of about one month, preceding the final GRACE-DA version.
• Meteorological forcing fields are excluded due to data agreements, limiting certain analyses.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Simulated with the Catchment-F2.5 model in the Land Information System (LIS) Version 7, using operational ECMWF meteorological analysis fields and assimilating GRACE data.

Time Range

February 1, -2003 to present

Freshness

Last updated 2026-03-13 02:38:30.446156; freshness should be verified.

Geography

Global at 0.25 x 0.25 degree resolution