IMOS MODIS: Daily Chlorophyll-a Concentration from Satellite Ocean Color

IMOS provides daily chlorophyll-a concentration data derived from the MODIS sensor on NASA's Aqua satellite using the OC3 algorithm. The dataset is produced by the Australian Ocean Data Network and was last updated on 2026-07-10. Production of contemporary MODIS data ceased at 2024-12-26, with users directed to VIIRS instruments for newer data.

Use Cases

• Monitoring phytoplankton bloom dynamics based on chlorophyll-a concentration.
• Studying ocean primary productivity and carbon cycling based on satellite-derived ocean color.
• Validating biogeochemical models based on spatially extensive remote sensing data.
• Assessing long-term trends in marine ecosystem health based on time-series chlorophyll data.

Strengths

• Data uses the OC3 algorithm recommended by NASA's Ocean Biology Processing Group.
• Production of contemporary data ceased at 2024-12-26, providing a clear historical endpoint.
• Dataset was last updated on 2026-07-10, indicating active metadata management.

Limitations

• Row count and dataset size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data collection ceased in 2024, limiting analysis of recent conditions.

Provenance

Source

Australian Ocean Data Network (AODN) via the Integrated Marine Observing System (IMOS).

Collection Method

Derived from multi-spectral measurements by the MODIS sensor on NASA's Aqua satellite, processed with the SeaDAS l2gen software using the OC3 algorithm.

Time Range

Data production ceased at 2024-12-26.

Freshness

Last updated 2026-07-10 00:50:21.294706; freshness should be verified as data collection ended in 2024.

Geography

Likely covers ocean areas observed by the Aqua satellite, specific coverage is not stated.