A Neglected Long-Term Series of Ground-Level Ozone

Surface ozone concentration based on coloration of De James test-papers corresponding to daytime and nightime exposure was monitored daily at the Athens Observatory during the period 1901–1940. This neglected series was converted to ozone levels using hourly relative humidity (R.H.) data and the R.H.- ozone conversion chart of Linvill et al. (1980). The climatic fluctuations of the resulting long-term surface ozone series are presented in this report.