Aquarius Level 3 Sea Surface Density 7-Day Gridded Satellite Data

Aquarius Level 3 sea surface density data provides gridded 1-degree spatial resolution maps averaged over 7-day periods. This version 5.0 dataset is the official end-of-mission public release from the NASA and CONAE AQUARIUS/SAC-D satellite mission, with density derived from retrieved salinity and collocated sea surface temperature. The data is generated from measurements by three radiometers and a scatterometer operating at L-band frequencies.

Use Cases

• Modeling ocean circulation and density-driven currents based on gridded sea surface density data.
• Studying seasonal and interannual salinity variations in the global ocean based on 7-day averaged maps.
• Validating and calibrating oceanographic models using satellite-derived density estimates from the Aquarius mission.
• Analyzing the relationship between sea surface density, salinity, and temperature for climate research.

Strengths

• Data is the official end-of-mission public release (version 5.0) from a NASA-CONAE satellite collaboration.
• Provides a 1-degree spatial resolution global grid, which is a standard scale for many climate models.
• Derived using the TEOS-10 standard for seawater properties, promoting consistency.
• Incorporates data from three radiometers and a scatterometer for surface roughness correction.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale statistical analysis.
• Data freshness should be verified as the last metadata update is dated 2026-03 13.

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 mission; specific years not provided in input.

Freshness

Last metadata update: 2026-03-13 14:55:03.724958; dataset represents final mission data.

Geography

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