The on-road transport emission inventory for the metropolitan area of Buenos Aires for greenhouse gases and criteria pollutants was developed as part of an inter-American project aimed at chemical weather forecasting in South American megacities. Our inventory, which is presented for two spatial disaggregation levels, is to the best of our knowledge the first study with these characteristics for this megacity
Within the scope of this research the relationship between the MABA emissions and those downscaled from the national inventory was established. Emissions of criteria pollutants computed at national level could be downscaled to the MABA region only by knowing the activity data. This approach may be applied to backcast MABA emissions but also to calculate the present and past emissions for other cities in the country.