Skorobogaty T. The influence of heterophase reactions on the spring-time ozone anomaly in Antarctica formation.

With the assumption of maximum entropy of a trace gas, absorbing radiation, in an atmospheric column, a system of differential equations has been obtained for the vertical distribution of ozone concentration and temperature. The model constructed has been tested using ozone sounding archives including over 20 thousand launchings, indicating a good agreement with experiment. The qualitive analysis of the model shows main zonal features of vertical distribution of ozone concentration and temperature. It is shown that the dominant role of the catalitic cycle with chlorines in ozone reducing in the period of the spring-time ozone anomaly in Antarctica (SOAA) doesn't seem quite reasonable and isn't confirmed by observation data. The strong anticorrelation of ozone and chlorines that is observed during the SOAA period may probably be explained by heterophase reactions in which molecules of chlorine nitrate and ozone are destroyed directly on a surface of particles of polar stratospheric clouds. Chlorine concentration increasing and ozone concentration decreasing during the SOAA period may be the consequences of one reason that results in changes of temperature and, hence, changes of the qualitative and quantitative parameters of polar stratospheric clouds. The ideas about the role of heterophase processes in forming SOAA that are presented in this work permit to explain the fact of presence of this phenomenon in that time when the contents of chlorofluorocarbons in stratosphere were low. Samples of butoxyaerosil produced by were exposed to ozone atmosphere during15, 30, 60, 120 and 240 minutes as models of atmospheric aerosols. Each sample was investigated in temperature-programmed desorption procedure in the temperature interval from temperature up to 1073 K. Temperature intervals of stability were found out from experimental data, physisorbed and chemisorbed products of ozonolysis were identified.