Aquarius Satellite Sea Surface Spiciness 28-Day Running Mean Maps

Aquarius Level 3 data provides gridded sea surface spiciness maps at 1-degree spatial resolution, representing a 28-day running mean derived from satellite descending passes. The dataset is version 5.0 from the Aquarius/SAC-D mission, a collaboration between NASA and Argentina's CONAE. Data collection ended with the mission's conclusion in 2015.

Use Cases

• Analyzing spiciness anomalies over 28-day periods to study ocean heat and freshwater content variability.
• Validating ocean circulation and mixing models using gridded spiciness data from three distinct radiometer footprints.
• Correlating sea surface spiciness patterns from descending passes with other satellite-derived ocean parameters.
• Investigating water mass formation and transformation processes using the standard mapped image data product.

Strengths

• Data originates from a dedicated satellite mission with three radiometers and a scatterometer for surface roughness correction.
• Provides a standard mapped image product at a consistent 1-degree spatial resolution for global analysis.
• Includes data averaged over multiple time scales, with this product focusing on a 28-day running mean.

Limitations

• Dataset is temporally stale, with the last update in 2015 and the Aquarius mission now concluded.
• Product is limited to descending satellite passes only, which may introduce sampling biases.
• Specific row counts, file sizes, and detailed accuracy metrics for version 5.0 are not provided in the input.

Provenance

Source

NASA and Argentina's Comision Nacional de Actividades Espaciales (CONAE) via the Aquarius/SAC-D satellite.

Collection Method

Satellite remote sensing using three push-broom radiometers at 1.413 GHz and a scatterometer at 1.26 GHz.

Time Range

Mission operational period (2011-2015); specific temporal coverage for this product is null.

Freshness

Last updated in 2015; mission concluded.

Geography

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