Aquarius: Monthly Climatology of Rain-flagged Sea Surface Salinity

Aquarius/SAC-D satellite data provides a global, gridded monthly climatology of sea surface salinity at a 1-degree spatial resolution. The dataset uses rain-flagged, ascending-pass retrievals from three radiometers and a scatterometer to measure brightness temperature and ocean backscatter for salinity estimation. This Level 3 standard mapped image product is version 5.0 from a NASA-CONAE collaboration.

Use Cases

• Analyzing long-term mean sea surface salinity patterns based on monthly climatology grids.
• Validating ocean circulation and freshwater flux models using satellite-derived salinity data.
• Studying the impact of rainfall on salinity retrievals using the rain-flagged product.
• Researching satellite instrument performance for salinity measurement using the three-beam radiometer configuration.

Strengths

• Provides a standardized, gridded product at a consistent 1-degree spatial resolution.
• Derived from a specific satellite instrument configuration with detailed technical specifications (e.g., 1.413 GHz radiometers, 370 km swath).
• Represents a collaborative effort between NASA and CONAE, indicating institutional validation.

Limitations

• Column names and exact data structure are not provided in any source description.
• Conflicting 'last updated' metadata (2026 vs. 2015) suggests potential platform synchronization issues.
• Dataset is limited to ascending satellite passes and rain-flagged retrievals, not a complete set of observations.

Provenance

Source

National Aeronautics and Space Administration (NASA) and Comision Nacional de Actividades Espaciales (CONAE)

Collection Method

Satellite remote sensing from the Aquarius instrument onboard the AQUARIUS/SAC-D satellite.

Time Range

Monthly climatology (long-term average), specific observation years not stated.

Freshness

Last updated dates conflict: one source lists 2026-03-13, another lists 2015-06-07.

Geography

Global ocean coverage.