Aquarius Satellite Sea Surface Salinity Mission Cumulative Data

Mission-cumulative sea surface salinity data is derived from NASA and CONAE's Aquarius/SAC-D satellite, providing gridded 1-degree spatial resolution measurements. The dataset includes ascending pass, rain-flagged salinity values averaged over daily, 7-day, monthly, and seasonal timescales. It represents the final version 5.0 product from the Aquarius instrument suite, which used three radiometers and a scatterometer for measurement and surface roughness correction.

Use Cases

• Analyzing global ocean salinity patterns and anomalies over the mission's lifetime using the gridded salinity values.
• Studying the relationship between sea surface salinity and climate phenomena like El Niño by correlating time-aggregated data with other climate indices.
• Validating and calibrating ocean circulation models with spatially mapped satellite-derived salinity data.
• Investigating the freshwater flux from rivers and ice melt into the ocean using salinity gradients in coastal regions.

Strengths

• Provides data at a consistent 1-degree spatial resolution, enabling global-scale analysis.
• Includes multiple temporal aggregations (daily, 7-day, monthly, seasonal), allowing study of both short-term variability and long-term trends.
• Represents a finalized, mission-cumulative product (Version 5.0), suggesting a high level of processing and quality control.
• Cross-platform presence on NASA Earthdata and Data.gov signals its importance and reliability as a key Earth science dataset.

Limitations

• Specific column names, row counts, and dataset size are unknown across all sources, limiting precise technical assessment.
• Conflicting license information: listed as 'other-license-specified' on Data.gov but 'None' on NASA Earthdata.
• Limited to ascending satellite passes only, excluding data from descending passes which may create gaps in temporal or spatial coverage.

Provenance

Source

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

Collection Method

Satellite remote sensing using three radiometers measuring brightness temperature at 1.413 GHz and a scatterometer measuring ocean backscatter at 1.26 GHz for roughness corrections.

Time Range

Mission cumulative (covers the full operational period of the Aquarius satellite, though specific dates are not provided).

Freshness

2026-03-13 17:27:55.146882

Geography

Global ocean coverage, with a total instrument swath width of approximately 370-390 km.