Assessment of the value of tropospheric ozone concentration dependingon meteorological conditions as exemplified by the Widuchowa station (North-West Poland).

Abstract

kalbarczyk r., kalbarczyk e.: Assessment of the value of tropospheric ozone concentration depending on meteorological conditions as exemplified by the Widuchowa station (north-West Poland). ekologia (Bratislava), vol. 29, no. 4, p. 398-411, 2010. The aim of the work was to find the temporal distribution of tropospheric ozone in connection with the course of meteorological conditions by night and daytime according to months, days and, next, hours and wind direction and to isolate a weather complex which was accompanied by the highest concentration of o3. The foundation of the study was hourly values of o3 concentration in 2005–2008, and hourly data on five meteorological elements (total solar radiation, air temperature, relative air humidity, atmospheric pressure and direction and velocity of wind) in April 2006, from the Widuchowa station located at the Polish–German border in north-West Poland. The effect of meteorological conditions on ozone concentration values was determined with the use of Pearson’s correlation analysis and cluster analysis. The highest mean concentration of ozone, out of the 48 analysed months in 2005–2008, was recorded in April 2006, by daytime, with the wind coming from westerly, easterly, south-westerly and southerly directions. The following weather situation was conducive to the highest o3 concentrations, amounting, on average, to about 127 μg.m -3: above-average mean total solar radiation (about 237 W.m-2), above-average mean air temperature (11.5°C), below-average relative air humidity (about 52%), above-average atmospheric pressure (about 1016 hPa) and above-average mean wind velocity (2.4 m.s-1).