Oksana A. Tarasova

Impact of Air Transport on Seasonal Variations and Trends of Surface Ozone at Kislovodsk High Mountain Station

The impact of air transport on the surface ozone variations is analyzed at Kislovodsk High Mountain Station for the period 1989–1996 on the basis of 2D back trajectories. It was shown that the contribution of photochemical and dynamical processes is different for the different seasons. In summer months the surface ozone concentration is governed by photochemical ozone production in semi polluted air from the regions of Northern Caspian, Southern Ural and Volga region. Time of the seasonal ozone maximum appearance is defined by joint influence of the processes of photochemical production and destruction in the eastern sectors and advection from Ukraine and Central Europe. The value of the seasonal minimum is determined by the processes of ozone destruction in the air coming from northeastern direction in the stable frontal zone. Distribution of sectors of the air transport changes from year to year and it can partly explain strong negative trend of the surface ozone concentration at the site.

Problem of the radiovision system resolution improvement in millimeter-wave range

At the Faculty of Physics of Moscow State University experimental researches of the working radiovision systems on the base of phased antenna array and radio optical systems with the sensors rules are carried out. Since 1980 the system of Sun radio observation in 3-mm wavelength range created by the specialists of Bauman Moscow State Technical University is exploited. Investigations in the mathematical modeling of image formation systems in wide wavelength range with different receiving schemes and with distortion compensation task solution and super-resolution are conducted by mathematician and physicists.

Preliminary results of LOTOS model application for Russia

The first results of the comparison of the transport-photochemical model LOTOS with measurements of the surface ozone and some of its precursor concentrations over European Russia are presented in the paper. The model is developed at the Netherlands Organization of Applied Research (TNO). Test runs were performed for the year 1997. Comparison of output parameters like surface ozone and nitrogen oxides concentrations was done using the measurement datasets of TROICA-3 expedition, EMEP measuring network and Kislovodsk High Mountain Station (KHMS). The surface ozone concentration measured at KHMS is in a good agreement with the modeled values if the second but not the surface level of the model is chosen. Comparison of hourly mean modeled concentrations with latitude profile of TROICA-3 expedition shows a substantial concentration underestimation while approaching the Ural Mountains and in the regions of strong emissions. The best agreement is observed while comparing model concentrations with EMEP measurements. The comparison showed that the model reproduces reasonably well the spatial distribution and temporal variability of the surface ozone concentration and that it can be used for the tasks of regional ozone monitoring.

Optimization of radiovision systems in millimeter-wave range

Method of optimization is considered to improve resolution and noise properties of millimeter-wave radio vision system. Conditions of optimal measurements are realized by coincidence of bandwidths both of signals and device.

Peroxy Radicals Concentration and Ozone Generation Rate for Different Regions of Russia as a Result of Troica-2 Experiment

Atmospheric oxidation ability in different regions of Russia and its connection with pollution is studied in this paper. It’s proposed to use peroxy radicals concentration as a qualitative degree of oxidation. Investigations were carried out on the base of measurements made during the Russian-German experiments TROICA-2 in summer 1996. Different approaches to territory zoning according to atmospheric oxidation ability were studied. The best zoning results were obtained using NO/NO2 index.

Modeling of object image formation systems in remote probes: optimization of distortion compensation

At the moment the problem of express atmosphere and objects on the Earths surface state control in remote probe measurements is very actual. For these purposes the dialog numerical modeling method of complex systems of images registration and formation in remote probe in wide wavelength range was developed. It gives possibility to compensate distortions in optical wavelength in condition of signal/noise ratio equal to 10/1.