NO2
DATASET DESCRIPTION
The UK nitrogen dioxide (NO2) collection covers January 2003 to August 2024. Its daily concentration grids are derived from the Copernicus Atmosphere Monitoring Service global reanalysis (EAC4), produced by ECMWF. The concentration unit is μg/m³, based on the project provider’s unit-conversion statement.
EAC4 combines atmospheric chemistry modelling and observations through data assimilation. The source is distributed at 3-hourly intervals on a 0.75° × 0.75° grid. The UK GeoTIFFs contain daily values resampled to a nominal 1 km grid; this resampling does not add street-level detail. The documentation does not specify the vertical level, daily aggregation method or conversion from mass mixing ratio to concentration.
For each grid cell, the available daily values were averaged in R within each calendar year, omitting missing values. The 2024 panel, marked with an asterisk, covers January–August only and is not a full-year mean. A common 0–30 μg/m³ colour scale is used across all panels.
Inness, A., Ades, M., Agustí-panareda, A., Barré, J., Benedictow, A., Blechschmidt, A.-M., Dominguez, J.J., Engelen, R., Eskes, H., Flemming, J., Huijnen, V., Jones, L., Kipling, Z., Massart, S., Parrington, M., Peuch, V.-H., Razinger, M., Remy, S., Schulz, M., and Suttie, M. (2019) The CAMS reanalysis of atmospheric composition, Atmos. Chem. Phys., 19, 3515-3556. https://doi.org/10.5194/acp-19-3515-2019.
DATA SOURCE
| Data Sources: CAMS global reanalysis (EAC4), ECMWF |
| Geographic Coverage: United Kingdom |
| Coordinate System: OSGB36 / British National Grid (inspected UK sample) |
| Source Spatial Resolution: 0.75° × 0.75°; project grid: 1 km (resampled) |
| Data Preparation Date: September 2026 |
| Data Format: GeoTIFF |
| Sampling Frequency of Data: Daily (official source: 3-hourly) |
| Years Available: 2003–2024 (2024: January–August) |
VARIABLES
- Daily NO2 concentration and the annual mean of available daily values (μg/m³, per project documentation)
CONTACT
- UK Dataset Prepared By: Bocheng Zhu
- Email: bocheng.zhu@mail.utoronto.ca
- Affiliated Organization: Ge-iSEE Lab, University of Toronto, Ontario, Canada
*2024 covers January–August only
