Aquarius Level 3: Monthly Sea Surface Salinity Maps at 1-Degree Resolution

Aquarius Level 3 sea surface salinity data provides gridded maps at a 1-degree spatial resolution, averaged over monthly time scales. This version 5.0 dataset is the official end-of-mission public release from the NASA and CONAE collaborative AQUARIUS/SAC-D satellite mission. The data is derived from three radiometers and a scatterometer measuring brightness temperature and ocean backscatter at L-band frequencies.

Use Cases

• Modeling global ocean circulation patterns based on monthly sea surface salinity maps.
• Studying the interaction between ocean salinity and climate phenomena based on gridded, time-averaged data.
• Calibrating or validating other salinity measurement systems based on the satellite's three-beam radiometer and scatterometer design.
• Analyzing long-term trends in sea surface salinity for climate change research based on the mission's official public data release.

Strengths

• Data is the official end-of-mission public release (version 5.0), suggesting a finalized and validated product.
• Provides salinity measurements from a dedicated satellite instrument with three radiometers at 29, 38, and 46-degree incidence angles.
• Incorporates a scatterometer for surface roughness corrections, which likely improves accuracy.
• Offers a standardized 1-degree spatial grid for consistent global analysis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total data volume are unknown, which may limit suitability assessment.
• Data may reflect geographic or temporal bias inherent to the satellite's 370 km swath and mission lifetime.

Provenance

Source

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

Collection Method

Satellite remote sensing via the AQUARIUS/SAC-D mission's radiometers and scatterometer.

Time Range

Covers the operational period of the AQUARIUS/SAC-D mission; specific dates are not provided.

Freshness

Last updated 2026-03-13 14:50:03.129616; freshness should be verified.

Geography

Global ocean coverage within the instrument's 370 km cross-track swath.