Aquarius Satellite 7-Day Sea Surface Density Gridded Maps

7-day gridded sea surface density data is derived from the Aquarius/SAC-D satellite instrument, a NASA and CONAE collaboration. The dataset provides global 1-degree spatial resolution density estimates based on retrieved salinity and collocated sea surface temperature. This version 5.0 product uses only descending pass retrievals and was last updated in 2015.

Use Cases

• Modeling global thermohaline circulation by analyzing 7-day sea surface density patterns.
• Validating ocean general circulation models using gridded 1-degree density data.
• Studying density-driven mixing processes by correlating density with ancillary sea surface temperature fields.
• Assessing interannual variability in surface ocean density from the satellite's 2011-2015 operational period.

Strengths

• Global spatial coverage with a 1-degree gridded resolution.
• Data derived from a dedicated satellite instrument with three radiometers and a scatterometer for surface roughness correction.
• Density estimates follow the TEOS-10 international seawater standard.

Limitations

• Temporal coverage is limited to the Aquarius mission period (likely 2011-2015), with no recent updates.
• Product uses only descending satellite passes, potentially introducing a diurnal sampling bias.
• Specific row count, file size, and data volume metrics are unavailable.

Provenance

Source

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

Collection Method

Satellite remote sensing using three radiometers at 1.413 GHz and a 1.26 GHz scatterometer, with data processed into gridded standard mapped images.

Time Range

Covers the Aquarius mission operational period; specific start date unknown, end circa 2015.

Freshness

Data last updated in 2015; product is historical.

Geography

Global ocean coverage.