ABSTRACT
This chapter provides a detailed analysis of a comprehensive set of air pollution concentrations and their associated meteorological measurements. The reliability of gas analysers depends largely on the simplicity of their design, and the ranking of the analysers is quite typical. Ozone analysers based on ultraviolet absorption are very straightforward instruments that rarely fail provided that regular servicing is carried out. A way of gaining insight into pollutant occurrence is to average the concentrations according to the hour of the day. In June, the period of daylight is long and the peak solar radiation high. The air temperature is warm and shows a pronounced afternoon increase in response to the solar radiation. Average wind speeds are low, with convective winds increasing during daylight hours. The ozone concentration shows a background level of about 23 parts per billion, with photochemical production increasing this concentration to a peak of 30 parts per billion at around 1600.
