Abstract
In developing countries, aerosol particles damage the health of hundreds of millions of people. Migration from the country side to megacities increases emissions and exposure to particles. Some countries have started to limit emissions based on particulate mass, but this may increase particle number concentrations. In this study we discuss some earlier measurements carried out in the developing world and compare results from one-week measurement campaigns concerning the particle number size distribution and PM10 mass concentrations in New Delhi, India and Beijing, China. Our results show that submicron particle concentrations are high in both places. The average PM10 concentration was 360 μg/m3 in New Delhi and 120 μg/m3 in Beijing. The corresponding total particle number concentrations in the size range 3–800 nm were 63 000 cm−3 and 35 000 cm−3. Number and mass concentrations and their characteristics showed significantly different behaviour between these two locations, which stresses the importance of long-term simultaneous measurements of both quantities in different types of megacities.
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Laakso, L., Koponen, I.K., Mönkkönen, P. et al. Aerosol particles in the developing world; a comparison between New Delhi in India and Beijing in China. Water Air Soil Pollut 173, 5–20 (2006). https://doi.org/10.1007/s11270-005-9018-5
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DOI: https://doi.org/10.1007/s11270-005-9018-5