Sentinel-3B OLCI Level-3 Global Chlorophyll-a Concentration Data

The Ocean Biology DAAC produces near real-time (NRT) global, gridded composites of surface chlorophyll-a concentration (chlor_a). This data suite provides a snapshot from a single orbit and supports time-series analysis, anomaly detection, and ecosystem applications. The activity was informed by the U.S. Government's Satellite Needs Working Group.

Use Cases

• Monitoring phytoplankton biomass trends based on global chlorophyll-a concentration maps.
• Detecting anomalies in marine ecosystems based on chlorophyll-a concentration data.
• Supporting fisheries management and ecosystem modeling based on chlorophyll-a as a proxy for primary productivity.
• Teaching and training in satellite oceanography based on near real-time global data products.

Strengths

• Provides near real-time data, offering a snapshot from a single orbit.
• Covers global spatial scale for surface chlorophyll-a concentration.
• Pairs well with other environmental variables like SST and winds for context.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Retrievals in optically complex coastal and inland waters may carry higher uncertainty.
• Row count and column-level documentation are absent; field semantics must be inferred after download.

Provenance

Source

Ocean Biology DAAC (OB_CLOUD), using Sentinel-3B OLCI satellite.

Collection Method

Satellite remote sensing.

Freshness

Near real-time (NRT).

Geography

Global