Minor gases species in the atmosphere of Russian cities from mobile laboratory measurements (TROICA experiments)

Urban pollution sources (transport, industrial and energy production plants, community services) affect both air quality in the cities and atmosphere and cli mate states on regional and global scales [1]. The chemical transport and climatic models applied for studying these effects are based on the data on concen trations and emissions of pollutants [2, 3]. The state network for urban air monitoring that exists in Russia[4] provides certain insight into the level of air pollu tion, but the insufficient volume and low quality of these data complicate adaptation of the numerical models to the Russian conditions. Lack of information in Russian cities had been considerably reduced after the implementation of transcontinental measure ments of atmosphere composition with the use of a unique mobile railroad based laboratory (TROICA experiments from 1995 until 2010) [5, 6]. Eleven of fif teen expeditions passed along the Transsiberian route between Moscow and Vladivostok.