How to cite the database and corresponding publication:

COVID-19 Air Quality Data Collection (2021), version XX, last updated YYYY-MM-DD from: https://covid-aqs.fz-juelich.de.

The database is generated based on:

Gkatzelis et al. (2021). "The Global Impacts of COVID-19 Lockdowns on Urban Air Pollution: A Critical Review and Recommendations", Elementa, 10.1525/elementa.2021.00176

File format:

The file downloads are provided as UTF-8 encoded CSV with semicolon (;) as the delimiter.