Ambient air quality trends and driving factor analysis in Beijing, 1983–2007

Zhang, Ju; Ouyang, Zhiyun; Miao, Hong; Wang, Xiaoke

doi:10.1016/s1001-0742(10)60667-5

Cited by 65 publications

(35 citation statements)

References 23 publications

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“…Daily SO 2 and NO 2 concentrations had clear seasonality, with peak concentrations occurring during the winter. Daily patterns for the concentrations of SO 2 and NO 2 in this study were consistent with previous studies (Zhang et al 2011a;Zhang et al 2011c). The pollutant concentrations were typically higher during the winter from November to the following March (Zhang et al 2011c).…”

Section: Discussionsupporting

confidence: 92%

“…Daily PM 10 concentrations did not show much seasonal variation. This could be because the pollution sources for PM 10 were varied and included traffic exhaust and coal-related pollution that have important impacts on air quality (Zhang et al 2011c). The average concentrations were higher than the median concentrations for the air pollutants studied, indicating that extremely high pollution episodes were driving the average concentrations.…”

Section: Discussionmentioning

confidence: 99%

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Ambient air quality and the effects of air pollutants on otolaryngology in Beijing

Zhang

et al. 2015

Environ Monit Assess

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To investigate temporal patterns, pollution concentrations and the health effects of air pollutants in Beijing we carried out time-series analyses on daily concentrations of ambient air pollutants and daily numbers of outpatient visits for otolaryngology over 2 years (2011)(2012) to identify possible health effects of air pollutants. The results showed that PM 10 was the major air pollutant in Beijing and that air quality was slightly better in 2012 than in 2011. Seasonal differences were apparent for SO 2 and NO 2 . Both the background and urban areas of Beijing experienced particulate matter pollution in 2011. In addition to local air pollution, Beijing was also affected by pollutants transported from other regions, especially during heavy air pollution episodes. PM 10 , NO 2 , and SO 2 concentrations showed positive associations with numbers of outpatient visits for otolaryngology during winter. NO 2 and SO 2 also had adverse ear, nose, and throat health effects outside of winter. The ear, nose, and throat health risks caused by air pollutants were higher during the winter than during the summer. NO 2 had stronger influence on increased the likelihood of outpatient visits than SO 2 . The findings provide additional information about air quality and health effects of air pollution in Beijing.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Ambient air quality and the effects of air pollutants on otolaryngology in Beijing

Zhang

et al. 2015

Environ Monit Assess

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“…5, the PAM correlated well to SO 2 , NO 2 , and CO, which could all be associated to combustion processes. This is consistent with the large contribution of residential heating to the emission of these pollutants in Beijing in the winter (Feng et al, 2014;Zhang et al, 2011;Ji et al, 2014). Ji et al (2014) attributed the "explosive growth" of fine particles mainly to local emissions under stagnant conditions during the heaviest particulate air-pollution episodes in the winter of Beijing, which was consistent with our experimental results in some respects.…”

Section: Pam Under Different Scenarios Of Transportsupporting

confidence: 89%

Distinct potential aerosol masses under different scenarios of transport at a suburban site of Beijing

Chu

et al. 2016

Journal of Environmental Sciences

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In order to evaluate the secondary aerosol formation potential at a suburban site of Beijing, in situ perturbation experiments in a potential aerosol mass (PAM) reactor were carried out in the winter of 2014. The variations of secondary aerosol formation as a function of time, OH exposure, and the concentrations of gas phase pollutants and particles were reported in this study. Two periods with distinct secondary aerosol formation potentials, marked as Period I and Period II, were identified during the observation. In Period I, the secondary aerosol formation potential was high, and correlated well to the air pollutants, i.e., SO 2 , NO 2 , and CO. The maximal secondary aerosol formation was observed with an aging time equivalent to about 3 days of atmospheric oxidation. In period II, the secondary aerosol formation potential was low, with no obvious correlation with the air pollutants. Meanwhile, the aerosol mass decreased, instead of showing a peak, with increasing aging time.Backward trajectory analysis during the two periods confirmed that the air mass in Period I was mainly from local sources, while it was attributed mostly to long distance transport in Period II. The air lost its reactivity during the long transport and the particles became highly aged, resulting in a low secondary aerosol formation potential. Our experimental results indicated that the in situ measurement of the secondary aerosol formation potential could provide important information for evaluating the contributions of local emission and long distance transport to the aerosol pollution.

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“…The growth in the transported contributions in these years may have been due to the higher growth rates of built-up areas, gross domestic product (GDP), and number of motor vehicles in Beijing's surrounding provinces (Fig. 11), which contribute to increased anthropogenic emissions through the processes of urbanization (Development Security and Cooperation Policy and Global Affairs et al, 2004;Zhang et al, 2011).…”

Section: Local Versus Distant Sourcesmentioning

confidence: 99%

Long-range transport and regional sources of PM2.5 in Beijing based on long-term observations from 2005 to 2010

Wang

Liu

Sun

et al. 2015

Atmospheric Research

187

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Ambient air quality trends and driving factor analysis in Beijing, 1983–2007

Cited by 65 publications

References 23 publications

Ambient air quality and the effects of air pollutants on otolaryngology in Beijing

Ambient air quality and the effects of air pollutants on otolaryngology in Beijing

Distinct potential aerosol masses under different scenarios of transport at a suburban site of Beijing

Long-range transport and regional sources of PM2.5 in Beijing based on long-term observations from 2005 to 2010

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