Meteorologische Interpretation von Ozon-Messungen. Ein Beitrag zu dem EUROTRAC Unterprojekt TOR Abschlussbericht ueber die wissenschaftlichen Ergebnisse 1990-1994

Abstract

To evaluate the question, to which extent tropospheric ozone is of natural origin or anthropogenic produced, measruements of ozone were interpreted with the aid of meteorological data. This research focuses on the mechanism in connection with cold front passages, the advection of air masses enriched with pollutants, and the impact of stratospheric ozone. Within a statistical study the long range transport of VOC emissions and their influence on ground-based ozone concentrations were analysed for 11 stations during 1990 using a simple model based on the calculations of trajectories coupled with an emission inventory for VOC. The part of the ozone concentration produced by pollutants long-range transferred to the stations were estimated by regression calculations. The mean flow of air masses over Europe has a large eastward component up to 70% which partly explains the increasing ozone concentrations from Northwest to Southeast Europe. Emission sources in the west of stations are responsible for 20-50% of long-range transported pollution. The analysis of the influence of long-range transported pollutants on ozone suggests that the ozone budget is more controlled by the variability of radiation than by that of longe-range transported VOC emissions. (orig./KW)SIGLEAvailable from TIB Hannover: F95B2306+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman