Aquarius Satellite Sea Surface Salinity 7-Day Gridded Data

Global sea surface salinity data is provided as gridded 1-degree resolution standard mapped images, averaged over 7-day periods. This Level 3 product is the official end-of-mission release (Version 5.0) from the NASA/CONAE AQUARIUS/SAC-D satellite mission, derived from descending passes only. The dataset is generated from three radiometers measuring brightness temperature at 1.413 GHz and a scatterometer measuring ocean backscatter at 1.26 GHz for surface roughness corrections.

Use Cases

• Analyzing spatial patterns of global sea surface salinity for climate studies.
• Tracking temporal changes in ocean salinity over weekly timescales using the 7-day averaged product.
• Validating and calibrating ocean circulation and coupled climate models with satellite-derived salinity data.
• Studying the relationship between sea surface salinity and freshwater fluxes from precipitation, evaporation, and river runoff.

Strengths

• Data is the official final release (Version 5.0) from the AQUARIUS/SAC-D mission, representing a stable, processed dataset.
• Provides global coverage with a consistent 1-degree spatial grid and multiple temporal averages, including the 7-day product.
• Salinity retrieval uses a multi-sensor approach, combining data from three radiometers and a scatterometer for surface roughness correction.

Limitations

• Specific row counts, file sizes, and complete column schemas are not provided by any source, limiting precise technical assessment.
• The mission is concluded, so data is not being updated; the last platform update noted was in 2015, though another source lists a 2026 date which may be a metadata artifact.
• Product is limited to descending satellite passes, which may introduce sampling biases compared to a full ascending/descending record.

Provenance

Source

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

Collection Method

Satellite remote sensing using radiometers and a scatterometer, processed into Level 3 gridded standard mapped images.

Time Range

Mission duration (specific dates not provided in sources).

Freshness

2015-06-07 12:45:21

Geography

Global ocean coverage.