OMNO2d: Daily Global Gridded Nitrogen Dioxide from OMI/Aura

OMNO2d provides daily global maps of nitrogen dioxide (NO2) concentrations at a 0.25x0.25 degree spatial resolution. The Level-3 gridded product contains total column and tropospheric column NO2 data, specifically for sky conditions with cloud fractions below 30 percent. This satellite-derived data is an indicator of air pollution from combustion and lightning, relevant for atmospheric chemistry and air quality monitoring.

Use Cases

• Tracking regional air pollution trends based on daily global tropospheric NO2 columns.
• Studying the role of NO2 in stratospheric ozone chemistry using total column measurements.
• Validating emission inventories and atmospheric models with cloud-screened satellite observations.
• Analyzing spatial patterns of combustion-related pollution from the 0.25-degree gridded data.

Strengths

• Provides a specific, high-resolution global spatial grid of 0.25x0.25 degrees.
• Contains two distinct NO2 measurements: total column and tropospheric column.
• Data is cloud-screened, using only observations where cloud fraction is less than 30 percent.

Limitations

• Key metadata such as row count, column names, and temporal coverage are not provided in the sources.
• The license is ambiguously listed as 'other-license-specified' without explicit terms.
• Data is limited to daytime observations from the sunlit portion of the satellite's orbit.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Satellite remote sensing from the Ozone Monitoring Instrument (OMI) on the Aura satellite, with pixel-level data binned and averaged into global grids.

Freshness

2026-04-09 23:28:29.123391

Geography

Global