Daily Global Aerosol Measurements from MODIS Satellite

MOD09CMA provides daily aerosol optical thickness data at a 0.05-degree spatial resolution globally. The product is derived from MODIS/Terra satellite observations by compositing orbits based on minimum band 3 values, excluding cloud and high solar zenith angle pixels. It is produced by LANCEMODIS.

Use Cases

• Modeling global aerosol transport patterns using daily geospatial thickness values.
• Correlating aerosol optical thickness with regional air pollution events using the 459-479 nm band data.
• Assessing cloud-free atmospheric conditions by analyzing pixels flagged for exclusion.
• Monitoring temporal changes in atmospheric particulates through daily composited orbit data.
• Validating climate models with spatially resolved global aerosol measurements.

Strengths

• Global spatial coverage at 0.05-degree resolution.
• Daily temporal frequency for monitoring changes.

Limitations

• Specific row count and temporal range are unknown.
• Data excludes pixels flagged for clouds and high solar zenith angles, limiting coverage in certain conditions.
• The NRT (Neal Real Time) designation suggests potential for unverified data.

Provenance

Source

LANCEMODIS via NASA Earthdata.

Collection Method

Derived from MOD09IDN, MOD09IDT, and MOD09IDS satellite products by compositing orbits.

Freshness

Daily updates (Neal Real Time).

Geography

Global.