ChinaHighNO2: Ground-level Nitrogen Dioxide Concentrations in Eastern China, 2013-2020

ChinaHighNO2 is a long-term, high-resolution dataset of ground-level nitrogen dioxide (NO2) concentrations for Eastern China from 2013 to 2020. It is a Level 3 yearly product with 0.1-degree (≈10 km) gridded, full-coverage data, generated by Jing Wei at the University of Maryland using AI to integrate ground measurements, satellite data, and atmospheric models. The dataset reports a cross-validation R² of 0.84 and a root-mean-square error of 7.99 µg m⁻³ on a daily basis.

Use Cases

• Analyzing long-term trends in NO2 pollution based on the 2013-2020 time series.
• Modeling the spatiotemporal distribution of air pollutants based on the 0.1-degree gridded data.
• Validating satellite-derived air quality estimates based on the ground-level measurements and model simulations used in its generation.
• Assessing regional environmental policy impacts based on the high-resolution, full-coverage data for Eastern China.

Strengths

• High accuracy with a reported cross-validation coefficient of determination (CV-R²) of 0.84.
• Full spatial coverage for Eastern China at a high resolution of 0.1 degrees (approximately 10 km).
• Long temporal coverage spanning eight years from 2013 to 2020.
• Generated from multiple big data sources including ground measurements, satellite products, and model simulations.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The dataset's last update date is unknown, which may affect freshness verification.
• The description indicates the data is continuously updated, suggesting the provided version may not be the latest.

Provenance

Source

Jing Wei, University of Maryland, College Park.

Collection Method

Generated using artificial intelligence from big data including ground-based measurements, satellite remote sensing, atmospheric reanalysis, and model simulations.

Time Range

2013 to 2020.

Freshness

The dataset is described as continuously updated, but the last update date for this specific listing is unknown.

Geography

Eastern China.