Assessment of small gaseous impurities in atmosphere of arid and semi-arid territories of Mongolia

Round-the-clock continuous synchronous measurements of concentrations of surface ozone (O3), oxides of nitrogen (NOx), carbon dioxide (CO2), meteorological, turbulent and radiating characteristics of atmosphere are presented.Measurements were observed by means of the automated operative system of registration and statistical processing of measurements during joint Russian–Mongolian scientific expedition in arid (desert Gobi) and semi-arid territories of Mongolia in the summers 2005–2006.High concentrations of O3, NO2 appeared during of all periods of supervision in desert Gobi. The observed diurnal variations of hourly averaged concentrations of surface ozone have a minimum equal 55 μg m−3 in the morning and a maximum equal 133 μg m−3 in day-time.The correlations between concentrations of small gaseous impurities in the atmosphere and meteorological and turbulence characteristics are analyzed.Air pollution concentrations observed in arid and semi-arid territories of Mongolia are compared.