Aquarius V5.0: Monthly Descending Rain-Flagged Sea Surface Salinity

Aquarius Official Release Level 3 Rain-flagged Sea Surface Salinity Smoothed Standard Mapped Image Descending Monthly Data V5.0 provides gridded sea surface salinity (SSS) at 1-degree spatial resolution. The data is derived from the Aquarius/SAC-D satellite, a NASA-CONAE collaboration, using three radiometers and a scatterometer for surface roughness correction. It represents a smoothed, rain-flagged product created exclusively from satellite descending passes.

Use Cases

• Monitoring global ocean salinity patterns based on 1-degree gridded data.
• Studying the freshwater cycle and its climate impacts using rain-flagged sea surface salinity.
• Validating ocean models with satellite-derived salinity measurements from the Aquarius instrument.
• Analyzing seasonal and monthly variability in sea surface salinity from time-series data.

Strengths

• Provides data at a consistent 1-degree spatial resolution, enabling global-scale analysis.
• Incorporates a scatterometer for surface roughness correction, improving salinity estimation accuracy.
• Represents a finalized, version 5.0 product from a major NASA-CONAE satellite mission.

Limitations

• Dataset size, row count, and specific column schema are undocumented across all platforms.
• The temporal coverage is not explicitly stated, limiting understanding of the data's time range.
• Conflicting 'last updated' dates (2015 vs. 2026) between sources create uncertainty about data currency.

Provenance

Source

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

Collection Method

Satellite remote sensing via the Aquarius instrument onboard the AQUARIUS/SAC-D satellite.

Freshness

Last updated dates conflict: one source reports 2026-03-13, another reports 2015-06-07.

Geography

Global ocean coverage with a 370 km cross-track swath.