Accounting for local meteorological effects in the ozone time-series of Lovozero (Kola Peninsula)

[摘要] The relationship between local meteorological conditions and the surface ozone variability wasstudied by means of statistical modeling, using ozone and meteorological parameters measuredat Lovozero (250 m a.s.l., 68.5°N, 35.0°E, Kola Peninsula) for the period of1999-2000. The regression model of daily mean ozone concentrations on such meteorological parameters astemperature, relative humidity and wind speed explains up to 70% of day-to-day ozonevariability in terms of meteorological condition changes, if the seasonal cycle is also considered.A regression model was created for separated time scales of the variables. Short-term, synopticaland seasonal components are separated by means of Kolmogorov-Zurbenko filtering. Thesynoptical scale variations were chosen as the most informative from the point of their mutualrelation with meteorological parameters. Almost 40% of surface ozone variations in time periodsof 11-60 days can be explained by the regression model on separated scales that is30% more efficient than ozone residuals usage. Quantitative and qualitative estimations of the relationsbetween surface ozone and meteorological predictors let us preliminarily conclude that at theLovozero site surface ozone variability is governed mainly by dynamical processes of varioustime scale rather than photochemistry, especially during the cold season.

[学科分类] 大气科学