Measurements of the vertical distribution of ozone and meteorological variables in forest stands were carried out. The experimental sites are located in eastern Austria in altidudes between 250m and 1145m above sea level. Measurements were made in mixed stands of conifer and decidous trees, pure stands of norway spruce, pure stands of beech and sprout-seedling stands of oak and hornbeam. Crucical for the ozone formation is the canopy. There and in the air space above the highest ammounts of ozone occurs. The amounts were up to 70 ppb higher than near the ground. Although there are temperature differences between the ground level and the canopy the occuring high ozone differences cannot be explained simply by the temperature difference. Since in the investigated lowland forest there is virtual no foliage from the base of the crowns down to the ground, the prounounced decline of ozone in this space cannot be explained by consumption through the surface of the vegetation. A possible explanation provide the investigation of the nitrogenmonoxide release from soils. A considerable amount of ozone might be consumed by the oxidation of nitrogenmonoxide and hydrocarbons. The ozone concentration at lowland sites and on plateaus is highly correlated with meteorological parameters. In many cases simple regression models based on meteorological data may be sufficient for estimation of spatial and temporal distribution. Another applications for modeling are verifing and correction of data from permanent measuring stations and bridge over of breakdowns. Necessary for modeling are some series of measurements of ozone and meteorological parameters distributed over a year.
181.45 (Einflüsse durch Verunreinigungen der Umwelt) 425.1 (Gase und Schwebestoffe (Rauchschäden)) 111.15 (Atmosphärische Bildungen und Störungen. Veränderungen. [gleichlaufend wie UDK 551.5 zu unterteilen]) [436] (Österreich)
