Title: Status and characteristics of ambient PM2.5 pollution in global megacities
Authors: CHENG ZhenLUO LinaWANG ShuxiaoWANG YungangSHARMA SumitSHIMADERA HikariWANG XiaoliangBRESSI MICHAELMIRANDA R. M.JIANG JingkunZHOU WeiFAJARDO OscarYAN NaiqiangHAO Jiming
Citation: ENVIRONMENT INTERNATIONAL vol. 89-90 p. 212-221
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2016
JRC N°: JRC97411
ISSN: 0160-4120
URI: http://www.sciencedirect.com/science/article/pii/S0160412016300289
http://publications.jrc.ec.europa.eu/repository/handle/JRC97411
DOI: 10.1016/j.envint.2016.02.003
Type: Articles in periodicals and books
Abstract: Ambient PM2.5 pollution is a substantial threat to public health in global megacities. This paper reviews the PM2.5 pollution of 45 global megacities in 2013, based on mass concentration from official monitoring networks and composition data reported in the literature. The results showed that the five most polluted megacities were Delhi, Cairo, Xi'an, Tianjin and Chengdu, all of which had an annual average concentration of PM2.5 greater than 89 μg/m3. The five cleanest megacities were Miami, Toronto, New York, Madrid and Philadelphia, the annual averages of which were less than 10 μg/m3. Spatial distribution indicated that the highly polluted megacities are concentrated in east-central China and the Indo-Gangetic Plain. Organic matter and SNA (sum of sulfate, nitrate and ammonium) contributed 30% and 36%, respectively, of the average PM2.5 mass for all megacities. Notable seasonal variation of PM2.5 polluted days was observed, especially for the polluted megacities of China and India, resulting in frequent heavy pollution episodes occurring during more polluted seasons such as winter. Marked differences in PM2.5 pollution between developing and developed megacities require more effort on local emissions reduction as well as global cooperation to address the PM2.5 pollution of those megacities mainly in Asia.
JRC Directorate:Sustainable Resources

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