Aquarius Satellite Mission Cumulative Sea Surface Density

Aquarius Level 3 sea surface density data provides gridded global ocean density estimates at 1-degree spatial resolution. The dataset is derived from satellite-measured brightness temperature and backscatter, processed using the TEOS-10 standard, and includes averages over daily, 7-day, monthly, and seasonal timescales. This mission-cumulative product (Version 5.0) results from a collaboration between NASA and Argentina's CONAE space agency.

Use Cases

• Analyzing global patterns of sea surface density for climate model validation.
• Studying the relationship between ocean density, salinity (retrieved by Aquarius), and sea surface temperature (from collocated Reynolds OI data).
• Investigating temporal variability in ocean surface properties using daily to seasonal averaged data.
• Calibrating and validating other satellite-derived oceanographic datasets.

Strengths

• Data is derived from a dedicated satellite instrument with three radiometers and a scatterometer, providing multi-angle and roughness-corrected measurements.
• Provides density estimates at a consistent 1-degree spatial resolution across multiple temporal averages (daily, 7-day, monthly, seasonal).
• Based on the internationally recognized TEOS-10 standard for seawater properties.

Limitations

• Key metadata such as row count, file size, and specific column names are unavailable from all sources.
• Sources conflict on license information (one specifies 'other-license-specified', others list 'unknown' or 'None').
• The data's last confirmed update was in 2015, though one platform lists a 2026 date which is likely a metadata error.

Provenance

Source

NASA and the Argentinian Space Agency (CONAE) via the Aquarius/SAC-D satellite mission.

Collection Method

Remote sensing via satellite-mounted radiometers and a scatterometer measuring brightness temperature and ocean backscatter.

Time Range

Mission cumulative period (specific dates not provided in sources).

Freshness

2015-06-07

Geography

Global ocean coverage.