Abstract. This paper presents a bottom-up methodology to estimate multi-pollutant hourly gridded on-road traffic emission using advanced flow and speed data for Delhi. We have used the globally adopted COPERT (Computer Programme Calculate Emissions from Road Transport) functions calculate as function of 127 vehicle categories. At first, volume congestion (travel time delay) relation is applied ...

This research apportioned size-resolved particulate matter (PM) contributions in a megacity northern China based on full year of measurements both inorganic and organic markers. Ions, elements, carbon fractions, n-alkanes, polycyclic aromatic hydrocarbons (PAHs), hopanes steranes 9 p.m. size fractions were analyzed. High molecular weight PAHs concentrated fine PM, while most other compounds sho...