Particulate matter pollution over China and the effects of control policies

Show full item record



Permalink

http://hdl.handle.net/10138/313041

Citation

Wang , J , Zhao , B , Wang , S , Yang , F , Xing , J , Morawska , L , Ding , A , Kulmala , M , Kerminen , V-M , Kujansuu , J , Wang , Z , Ding , D , Zhang , X , Wang , H , Tian , M , Petäjä , T , Jiang , J & Hao , J 2017 , ' Particulate matter pollution over China and the effects of control policies ' , The Science of the Total Environment , vol. 584 , pp. 426-447 . https://doi.org/10.1016/j.scitotenv.2017.01.027

Title: Particulate matter pollution over China and the effects of control policies
Author: Wang, Jiandong; Zhao, Bin; Wang, Shuxiao; Yang, Fumo; Xing, Jia; Morawska, Lidia; Ding, Aijun; Kulmala, Markku; Kerminen, Veli-Matti; Kujansuu, Joni; Wang, Zifa; Ding, Dian; Zhang, Xiaoye; Wang, Huanbo; Tian, Mi; Petäjä, Tuukka; Jiang, Jingkun; Hao, Jiming
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2017-04-15
Language: eng
Number of pages: 22
Belongs to series: The Science of the Total Environment
ISSN: 0048-9697
URI: http://hdl.handle.net/10138/313041
Abstract: China is one of the regions with highest PM(2.5)concentration in the world. In this study, we review the spatio-temporal distribution of PM2.5 mass concentration and components in China and the effect of control measures on PM2.5 concentrations. Annual averaged PM2.5 concentrations in Central-Eastern China reached over 100 mu g m(-3), in some regions even over 150 mu g m(-3). In 2013, only 4.1% of the cities attained the annual average standard of 35 mu g m(-3). Aitken mode particles tend to dominate the total particle number concentration. Depending on the location and time of the year, new particle formation (NPF) has been observed to take place between about 10 and 60% of the days. In most locations, NPF was less frequent at high PM mass loadings. The secondary inorganic particles (i.e., sulfate, nitrate and ammonium) ranked the highest fraction among the PM2.5 species, followed by organic matters (OM), crustal species and element carbon (EC), which accounted for 6-50%, 15-51%, 5-41% and 2-12% of PM2.5, respectively. In response to serious particulate matter pollution, China has taken aggressive steps to improve air quality in the last decade. As a result, the national emissions of primary PM2.5, sulfur dioxide (SO2), and nitrogen oxides (NOx) have been decreasing since 2005, 2006, and 2011, respectively. The emission control policies implemented in the last decade could result in noticeable reduction in PM2,(5)concentrations, contributing to the decreasing PM2.5 trends observed in Beijing, Shanghai, and Guangzhou. However, the control policies issued before 2010 are insufficient to improve PM2.5 air quality notably in future. An optimal mix of energy-saving and end-of-pipe control measures should be implemented, more ambitious control policies for NMVOC and NH3 should be enforced, and special control measures in winter should be applied. 40-70% emissions should be cut off to attain PM2.5 standard. (C) 2017 Elsevier B.V.All rights reserved.
Subject: PM2.5
Metropolitan regions
Chemical speciation
Control policies
China
YANGTZE-RIVER DELTA
EXTRACTABLE ORGANIC-COMPOUNDS
NUMBER SIZE DISTRIBUTIONS
CONDENSATION NUCLEI PRODUCTION
PARTICLE FORMATION
LONG-TERM
SOURCE APPORTIONMENT
SEASONAL-VARIATION
HAZE POLLUTION
AIR-POLLUTANTS
114 Physical sciences
1172 Environmental sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Wang_particulate_AAM.pdf 2.149Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record