Ozone levels in central London

MEASUREMENTS of ozone and some primary pollutants, including oxides of nitrogen and total hydrocarbons, have been in progress at the Central London background site of this laboratory since July 1972. A preliminary note1 discussed the early results from this site; here we present a statistical analysis of the relationship between ozone levels in Central London and some meteorological parameters measured at the London Weather Centre, ∼ 0.4 km from the sampling site. The data were collected during the periods July–September 1972 and April–September in both 1973 and 1974.