Satellite-Derived Global Chlorophyll-a Concentrations at 9km Resolution

ADEOS-II/GLI L3 STA Map Chlorophyll-a provides global estimates of phytoplankton biomass concentration in mg/m^3. The Japan Aerospace Exploration Agency (JAXA) produced this data from the GLI sensor onboard the ADEOS-II satellite, with a spatial resolution of 9 kilometers and statistical periods of 8 days. The dataset was last updated in October 2003.

Use Cases

• Analyze spatial and temporal patterns of global phytoplankton biomass using the Chlorophyll-a concentration field.
• Correlate 8-day composite Chlorophyll-a values with sea surface temperature data from other satellite products.
• Validate regional ocean ecosystem models by comparing simulated chlorophyll with the 9km resolution mapped data.
• Study seasonal blooms in specific ocean basins using the time-series of 8-day statistical products.

Strengths

• Global spatial coverage generated for each statistical unit.
• Data provided at a defined spatial resolution of 9 kilometers.
• Offers multiple temporal aggregations including 1-day, 8-day, and 1-month statistics.

Limitations

• Data collection ended with the ADEOS-II mission, with the last update in 2003, limiting contemporary analysis.
• Chlorophyll-a estimates are derived via empirical algorithms, which can introduce region-specific biases.
• The 9km resolution may be too coarse for studying coastal or estuarine processes.

Provenance

Source

Japan Aerospace Exploration Agency (JAXA).

Collection Method

Derived from GLI_ADEOS-II_L2_NW data using empirical relationships, binned, and projected onto an EQR map.

Time Range

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

Freshness

Static dataset from a concluded mission; last updated 2003-10-25.

Geography

Global ocean coverage.