Аннотация:For the first time empirical relations between surface concentrations of six air gases (CO2, O3, NO, NO2, CO and SO2) and meteorological parameters (air temperature, wind speed and relative humidity) were calculated on a base of hourly measurements during 12 years in Moscow. Influence of different phenomena (thermal convection, inversions, strong Arcticcold advection, smoky haze in time of strong heat wave, heat stress of trees, etc.) on the surface air composition is discussed.