GLDAS_CLSM025_DA1_D: Daily Global Land Surface Hydrology with GRACE Data Assimilation

February 2003 to present daily land surface fields from NASA's Global Land Data Assimilation System (GLDAS-2.2). The dataset assimilates total terrestrial water anomaly observations from the GRACE satellite into the Catchment Land Surface Model, providing 24 variables at a 0.25 x 0.25 degree resolution. It is produced by NASA and archived at the GES DISC.

Use Cases

• Modeling terrestrial water storage anomalies based on GRACE data assimilation.
• Analyzing long-term soil moisture and snow water equivalent trends based on daily land surface fields.
• Validating hydrological models against assimilated satellite observations.
• Studying drought and flood events based on assimilated water storage data.

Strengths

• Incorporates data assimilation from the GRACE satellite mission, likely improving accuracy.
• Provides a consistent daily time series from February 2003 to the present.
• Archived in NetCDF format, a standard for scientific geospatial data.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The dataset does not include the underlying meteorological forcing fields due to data agreements.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration (NASA)

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 observations.

Time Range

February 2003 to present

Freshness

Last updated 2026-03-13 02:29:43.815414; freshness should be verified.

Geography

Global at 0.25 x 0.25 degree resolution