Author(s)

R. Fernandez Patier, P. Dfez Hernandez, E. Diaz Ramiro & J.M. Fernandez

Abstract

During 1992, nitrogen oxides (NOJ and ozone (O.) were monitored in Madrid and in the surrounding areas (Loeches), to study the formation and transport of photochemical pollutants from the big cities to around areas After four campaigns, carried out during the four climatological seasons of 1992, a great difference between the magnitude and the profile of the urban and rural ambients is observed. It stands out the high mean levels of NO (between 71 and 417 ppbv) and NO-, (between 1 1 and 89 ppbv) in the city. As well as the high mean level of O, (between 9 and 39 ppbv) and the higher proportion of NO in relation to the precursor NO in the rural area The NO/NO and N

Keywords