RAMSSA: Daily Regional Sea Surface Temperature Analysis for Australia

Australian regional sea surface temperature analysis covering 20N to 70S and 60E to 170W, produced daily by the Australian Bureau of Meteorology. The dataset blends satellite observations from infrared and microwave radiometers with in-situ data from ships, buoys, and floats, processed using optimal interpolation on a 1/12-degree grid. It provides foundation SST estimates designed to be free of diurnal warming and nocturnal cooling effects.

Use Cases

• Modeling regional ocean heat content and marine heatwave trends based on daily foundation SST estimates.
• Assimilating multi-source satellite and in-situ observations for weather and climate forecasting.
• Validating satellite-derived sea surface temperature algorithms using blended in-situ data.
• Analyzing long-term SST climatology and anomalies in the Australian region, referencing the 1961-1990 baseline.

Strengths

• Operational daily production ensures regular updates.
• Blends data from multiple sources: satellite infrared/microwave and in-situ ships, buoys, and floats.
• Uses a high-resolution 1/12-degree grid for regional analysis.
• Applies quality controls, rejecting SST observations under specific low wind-speed conditions.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.
• In the absence of observations, the analysis relaxes to lower-resolution climatologies, which may reduce local accuracy.

Provenance

Source

Australian Bureau of Meteorology, distributed by NASA.

Collection Method

Produced using optimal interpolation (OI) blending satellite and in-situ data from the Global Telecommunications System (GTS).

Time Range

Daily production; climatology baseline is 1961-1990.

Freshness

Last updated 2026-03-13 02:32:19.490589; freshness should be verified.

Geography

Australian region (20N - 70S, 60E - 170W).