PHOTOCHEMICAL OZONE CREATION POTENTIALS - A STUDY OF DIFFERENT CONCEPTS

Photochemical ozone creation potentials (POCP) have been calculated for 75 organic compounds and carbon monoxide. The creation potentials are calculated using different concepts; peak ozone concentrations and the average formation of ozone, including the amount deposited, during two or four days. The calculations were made by a single-box trajectory model with meteorological and chemical conditions chosen to correspond to a summer high-pressure situation in southern Sweden. Under these conditions, over a 96-hour average, POCPs show that ethene and acrolein are the most efficient ozone producers, followed by higher alkenes, aromatics, alkanes and ethers which can be considered as mediate ozone producers. Chlorinated species, alcohols and ketones are very weak producers of ozone. The relative POCPs differ depending on the method of calculation and the chemical (NO.) environment.