S5P_L2__NO2___: Sentinel-5P Tropospheric Nitrogen Dioxide Satellite Data

Sentinel-5P TROPOMI provides tropospheric nitrogen dioxide (NO2) measurements at a high spatial resolution of approximately 5.5 km at nadir, implemented from August 6, 2019. The retrieval is based on the DOMINO approach, using a DOAS retrieval and a data assimilation model to separate stratospheric and tropospheric NO2 columns. This dataset is part of the first Atmospheric Composition Sentinel mission, a joint initiative between the European Space Agency and the Kingdom of the Netherlands.

Use Cases

• Monitoring urban and industrial NO2 pollution hotspots based on the ~5.5 km nadir spatial resolution.
• Analyzing long-term trends in tropospheric NO2 concentrations for climate and air quality studies based on the time-series data collection.
• Validating and improving atmospheric chemistry transport models using the DOMINO retrieval approach which separates stratospheric and tropospheric contributions.
• Assessing the effectiveness of emission reduction policies by observing changes in NO2 column densities over time.

Strengths

• Provides high spatial resolution data at approximately 5.5 km at nadir, enabling detailed pollution mapping.
• Based on the sophisticated DOMINO retrieval approach developed through the QA4ECV project, which separates stratospheric and tropospheric NO2.
• Data collection is part of the operational Copernicus Sentinel-5P mission, ensuring a consistent and calibrated time series.

Limitations

• Critical metadata such as specific column names, row counts, dataset size, and license information are missing from all provided sources.
• There is a conflict in the 'last updated' metadata, with one source reporting 2026-03-13 and another reporting 2019-08-06, casting doubt on data maintenance and freshness.
• The description focuses on the retrieval methodology and instrument but lacks concrete details on the actual data structure and accessibility.

Provenance

Source

European Space Agency (ESA) and the Kingdom of the Netherlands, hosted by NASA GES DISC.

Collection Method

Satellite remote sensing via the TROPOMI instrument on the Sentinel-5P spacecraft, using the DOMINO retrieval algorithm.

Time Range

From August 6, 2019 onward.

Freshness

2026-03-13 20:20:48.325026 (conflicting with another source date of 2019-08-06)

Geography

Global coverage from the satellite's nadir-viewing orbit.