Global Monthly Sea Surface Salinity from Three Satellite Missions on a 0.25-Degree Grid

A level 4 product on a 0.25-degree spatial and monthly temporal grid. The dataset is the monthly mean of sea surface salinity derived from the Aquarius/SAC-D, SMAP, and SMOS satellite missions using Optimal Interpolation. It is produced by Earth and Space Research (ESR), the International Pacific Research Center (IPRC), and Remote Sensing Systems (RSS).

Use Cases

• Modeling global ocean circulation and freshwater fluxes based on monthly salinity fields.
• Validating satellite-derived salinity measurements against in-situ data using the Optimal Interpolation method.
• Analyzing long-term trends in sea surface salinity for climate change studies.
• Assimilating salinity data into ocean forecasting models based on the 0.25-degree grid.

Strengths

• Integrates data from three satellite missions (Aquarius, SMAP, SMOS) for potentially improved coverage.
• Provides data on a standardized 0.25-degree spatial grid with monthly temporal resolution.
• Uses an Optimal Interpolation method with a defined 7-day decorrelation time scale.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file size are unknown, which may limit suitability assessment.

Provenance

Source

Earth and Space Research (ESR), International Pacific Research Center (IPRC), Remote Sensing Systems (RSS), aggregated by NASA.

Collection Method

Optimal Interpolation of satellite data from Aquarius, SMAP, and SMOS missions.

Time Range

Monthly temporal resolution; specific date range is not provided in the input.

Freshness

Last updated 2026-03-12 23:19:43.644390; freshness should be verified.

Geography

Global coverage on a 0.25-degree grid.