Global Daily Chlorophyll-a Concentration Maps from ADEOS-II Satellite

9 km resolution maps of chlorophyll-a concentration in milligrams per cubic meter, derived from the GLI sensor onboard the ADEOS-II satellite. The Japan Aerospace Exploration Agency (JAXA) produced this data to monitor the Earth's carbon cycle and marine biological content. The dataset's current version is 2, with a last recorded update in October 2003.

Use Cases

• Modeling global ocean primary productivity by analyzing daily chlorophyll-a concentration values.
• Tracking phytoplankton bloom phenology and distribution patterns using the 9 km spatial resolution data.
• Validating biogeochemical ocean models by comparing simulated chlorophyll levels against the satellite-derived concentration maps.
• Investigating seasonal and interannual variability in marine ecosystems from the 1-day, 8-day, and 1-month statistical products.

Strengths

• Global spatial coverage for comprehensive ocean analysis.
• Data available at multiple temporal resolutions: 1-day, 8-day, and 1-month statistics.
• Standardized physical unit (mg/m^3) and EQR map projection for consistency.

Limitations

• Data collection ended with the ADEOS-II mission, with the last update in 2003, limiting analysis to that period.
• Spatial resolution of 9 km may be too coarse for studying coastal or small-scale oceanographic features.
• Derived from empirical algorithms applied to Level 2 data, introducing potential retrieval errors.

Provenance

Source

Japan Aerospace Exploration Agency (JAXA).

Collection Method

Derived from GLI_ADEOS-II_L2_NW data using empirical relationships based on in-water measurements.

Time Range

Coverage corresponds to the operational period of the ADEOS-II satellite (launched 2002).

Freshness

Static historical archive; last updated 2003-10-25.

Geography

Global ocean coverage.