HAQAST Sentinel-5P TROPOMI Nitrogen Dioxide (NO2) CONUS Annual Level 3 0.01 x 0.01 Degree

Annual tropospheric nitrogen dioxide (NO2) maps derived from the Sentinel-5P TROPOMI satellite instrument provide a consistent record for air pollution trend analysis from 2019 to the present. The George Washington University Air, Climate and Health Laboratory produced this Level 3 dataset by oversampling daily observations to a high-resolution 0.01° x 0.01° grid (~1 km²) across the Continental United States. NO2 is a key air pollutant and precursor to ozone and particulates, with vertical column densities serving as a qualitative proxy for near-surface emissions in urban areas.

Use Cases

• Analyzing long-term trends in urban air pollution based on annual NO2 averages.
• Mapping spatial patterns of NO2 emissions across the Continental U.S. based on the 1 km gridded data.
• Correlating satellite-derived NO2 columns with ground-based air quality measurements and health outcome data.
• Studying the relationship between fossil fuel combustion activities and atmospheric NO2 levels in polluted locations.

Strengths

• Provides a consistent annual record from 2019 to the present, enabling trend analysis.
• Offers high spatial resolution of 0.01° x 0.01° (~1 km²) through oversampling of satellite data.
• Derived from a single, consistent algorithm (ESA version 2.4) applied to TROPOMI Level 2 data.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data represents a daily snapshot at approximately 13:30 local time and may not capture diurnal variations.

Provenance

Source

National Aeronautics and Space Administration (NASA), processed by the George Washington University Air, Climate and Health Laboratory for the HAQAST team.

Collection Method

Annual averages derived from Level 2 TROPOMI NO2 satellite observations, oversampled to a regular grid.

Time Range

2019 to present

Freshness

Last updated 2026-03-13 01:44:33.561579; freshness should be verified.

Geography

Continental United States (CONUS)