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Photochemical smog in China: scientific challenges and implications for air-quality policies

Journal article
Authors Mattias Hallquist
John Munthe
Min Hu
Tao Wang
Chak K. Chan
Jian Gao
Johan Boman
Song Guo
Åsa M. Hallquist
Johan Mellquist
Jana Moldanava
Ravi K. Pathak
Jan B. C. Pettersson
Håkan Pleijel
David Simpson
Marie Thynell
Published in National Science Review
Volume 3
Issue 4
Pages 401-403
ISSN 2095-5138
Publication year 2016
Published at Department of Biological and Environmental Sciences
Department of Chemistry and Molecular Biology
School of Global Studies
Pages 401-403
Language en
Subject categories Climate Research, Environmental chemistry, Earth and Related Environmental Sciences, Analytical Chemistry, Physical Chemistry, Organic Chemistry, Chemical Sciences, Globalization Studies, Environmental Sciences, Peace and development research


In large areas of China severe air pollution events pose a significant threat to human health, ecosystems and climate. Current reduction of primary emissions will also affect secondary pollutants such as ozone (O3) and particulate matter (PM), but the magnitude of the effects is uncertain. Major scientific challenges are related to the formation of O3 and secondary particulate matter including Secondary Organic Aerosols (SOA). Large uncertainties also remain regarding the interactions of soot, SOA and O3 under the influence of different SO2, NOX and VOC concentrations. To improve the understanding of these secondary atmospheric interactions in China, scientific areas of central importance for photochemically induced air pollutants have been identified. In addition to the scientific challenges, results from research need to be synthesized across several disciplines and communicated to stakeholders affected by air pollution and to policy makers responsible for developing abatement strategies. Development of these science-policy interactions can benefit from experience gained under the UN ECE Convention on Long Range Transboundary Air Pollution (LRTAP)

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