ClearfLo (Clean Air for London) Project was a collaborative scientific project involving several academic institutions in the UK, which aimed to set up air pollution monitoring sites alongside meteorological measurements to investigate boundary layer pollution across London.

This dataset collection contains meteorology, composition and particulate loading measurements of London's urban atmosphere.

The ambition of ClearfLo was to provide long-term integrated measurements of the meteorology, composition and particulate loading of London’s urban atmosphere, made at street level and at elevated sites, complemented by modelling to improve predictive capability for air quality.

ClearfLo was funded by the Natural Environment Research Council (NERC) for three years from Jan 2010, and was coordinated by the National Centre for Atmospheric Science (NCAS).