ANALYSIS OF NONLINEAR VARIABILITY IN SURF ACE OZONE CONCENTRATION SERIES OBSERVED IN ANTARCTICA

The data from measurements of surface ozone concentrations and surface meteorological parameters at Antarctic stations Molodezhnaya and Mirn yi in spring 1987 and summer 1988 are analyzed. The correlation dimens ions of the time series for the periods of developed cyclonic activity and the period of prevailing slope wind are calculated. The analysis reveals a fundamental difference in the dynamics of the variability of the surface ozone and the surface wind direction between the periods of cyclonic activity on the one hand and the period of slope wind on t he other hand. In the first case, the values of the correlation dimens ion that correspond to diurnal cycles are founded to be about 1 for oz one and in the range from 1 to 2 for the wind direction. In the second case, the dynamics of variations of the surface ozone and the surface wind direction does not reveal any finite correlation dimension in th e range of intra- and interdiurnal variability. It is supposed that th e main mechanism of the discovered diurnal cycle of the surface ozone concentration with nocturnal maxima and daylight-hour minima is due to the diurnal rotation of the surface wind direction, namely, the noctu rnal, enhancement of the circulation related to slope winds.