Aquarius L3: Sea Surface Density Annual Ascending Mapped Data

Aquarius Level 3 data provides gridded sea surface density at 1-degree spatial resolution, averaged annually from ascending satellite passes. The dataset is derived from version 5.0 of the Aquarius mission, a NASA-CONAE collaboration using a satellite instrument with three radiometers and a scatterometer. Surface density estimates are calculated using the TEOS-10 standard, combining retrieved salinity with collocated sea surface temperature data.

Use Cases

• Analyzing annual mean ocean density patterns for climate model validation based on gridded 1-degree resolution data.
• Studying ocean circulation and water mass distribution using TEOS-10 standard surface density estimates.
• Investigating the relationship between sea surface salinity and temperature using the combined Aquarius and Reynolds OI SST product.
• Assessing satellite remote sensing techniques for oceanography using data from the three-beam Aquarius radiometer and scatterometer system.

Strengths

• Data is from the official Version 5.0 release of the Aquarius mission, representing a processed standard product.
• Provides a specific annual composite from ascending satellite passes, offering a consistent temporal view.
• Based on the internationally recognized TEOS-10 standard for seawater properties.
• Derived from a sophisticated satellite instrument suite with a 370 km swath and multiple incidence angles.

Limitations

• Metadata completeness is low; column names, row counts, and exact file sizes are not provided in any source.
• Sources conflict on freshness; one platform lists an update in 2026, while another lists 2015, suggesting potential metadata errors.
• The dataset is limited to ascending passes only, omitting data from descending passes.

Provenance

Source

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

Collection Method

Satellite remote sensing from the AQUARIUS/SAC-D satellite, using three radiometers at 1.413 GHz and a 1.26 GHz scatterometer.

Time Range

Annual composite (specific years not provided in input).

Freshness

2026-03-13 17:24:07.914620 (Note: This date is from one platform and conflicts with a 2015 date from another, indicating a potential metadata issue.)

Geography

Global ocean coverage with a 370 km instrument swath, gridded to 1-degree resolution.