DIURNAL VARIATIONS OF SURFACE OZONE AROUND TOMSK

B. D. Belan and T. K. Sklyadneva

Diurnal variations of the ozone concentration in the surface layer are considered based on 10-year hourly monitoring data. The variations depend on two factors: the amount of ozone-forming substances in the air and total solar radiation. These factors are affected by air temperature and seasonal vegetation dynamics. In the fall-winter season the diurnal ozone variations have a secondary maximum, a nocturnal one, which appears to be caused by air subsidence not from the stratosphere but from the boundary layer.