A study of urban pollution and haze clouds over northern China during the dusty season based on satellite and surface observations

Tao, Minghui; Chen, Liangfu; Wang, Zifeng; Ma, Pengfei; Tao, Jianhua; Jia, Suotang

doi:10.1016/j.atmosenv.2013.10.010

Cited by 89 publications

(53 citation statements)

References 28 publications

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“…Sand-dust storms in spring [4], secondary aerosol generation O 3 , and PM 2.5 pollution in summer [31], agriculture biomass burning in autumn [32], and coal burning for winter heating [20] are the main drivers for seasonal air pollution events, whereas climatic conditions, such as high humidity and low wind speed, are key environmental factors [33]. Thus, we collected air pollution data, socioeconomic data, climatic data, and land use/cover data for the 69 cities in China based on data availability (Figure 1).…”

Section: Potential Socioeconomic Climatic and Urban Form Factorsmentioning

confidence: 99%

“…Recent studies have related these spatial patterns of air pollution to environmental and socioeconomic factors depending on distinguished mechanisms [6,[16][17][18][19]. For example, wind not only dissipates air pollutants in the city, but also transports pollutants from industrial areas to urban areas [12,20]. Compact cities with mixed land uses were reported to have less transportation emissions than sprawl cities [17,21], but also could trap more air pollutants from urban construction, thereby leading to higher pollution concentrations [22].…”

Section: Introductionmentioning

confidence: 99%

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Disentangling the Complex Effects of Socioeconomic, Climatic, and Urban Form Factors on Air Pollution: A Case Study of China

Liu

2018

Sustainability

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China's tremendous economic growth during the past three decades has resulted in worsening air quality in most of its cities. However, the spatiotemporal patterns and underlying drivers of air pollution in China remain poorly understood. To address this issue, we used stepwise regression to identify major socioeconomic, climatic, and urban form factors influencing air pollution in 69 major cities across China. Our results showed that social factors such as population size and density were positively correlated with emissions of PM 2.5 , PM 10 , NO x , and SO 2 . Economic factors such as Gross Domestic Product (GDP) and GDP of secondary industry were positively correlated with industry and transportation emissions but negatively correlated with residential emissions of air pollutants. Urban form attributes such as measures of urban fragmentation and contiguity were important in explaining patterns of emissions from residential, power generation, and transportation sectors. As for climatic factors, higher precipitation, higher wind speed, and higher temperatures were all negatively correlated with air pollution levels. We also found that the effects of socioeconomic, climatic, and urban from factors on air pollution levels varied considerably among seasons and between the annual and seasonal scales. Our findings have useful implications for urban planning and management for controlling air pollution in China and beyond.

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Section: Potential Socioeconomic Climatic and Urban Form Factorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Disentangling the Complex Effects of Socioeconomic, Climatic, and Urban Form Factors on Air Pollution: A Case Study of China

Liu

2018

Sustainability

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“…The NCP, which includes Beijing, Tianjin, and the Hubei province, has become the third largest and most important economic zone after the Yangtze River Delta and the Pearl River Delta in China (Boynard et al, 2014;Tao et al, 2014). The region is listed as one of the most severely polluted areas in the world due to rapid industrialization, important growth in car ownership and largescale agricultural activities.…”

Section: Introductionmentioning

confidence: 99%

Identification and quantification of shipping emissions in Bohai Rim, China

Zhang

Chen

Tian

et al. 2014

Science of The Total Environment

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“…The region is one of the fastest growing and most severely contaminated in China. Among many atmospheric contaminants, polycyclic aromatic hydrocarbons (PAHs) are of particular concern in terms of their contribution to severe air pollution events in this region (Wang et al, 2014b;Tao et al, 2014), and PAH emissions have been increasing due to the rapid growth in coal consumption and the number of motor vehicles Lin et al, 2012;Liu et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Exchange of polycyclic aromatic hydrocarbons across the air-water interface in the Bohai and Yellow Seas

Chen

Lin

Tang

et al. 2016

Atmospheric Environment

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h i g h l i g h t sWe assess the fate of atmospheric PAHs in the air-water interface of BS and YS. The volatilization fluxes of three-ring PAHs were higher than the deposition fluxes. Petrogenic inputs contribute PAHs in the dissolved phase and sustain volatilization. The input to and output from the water reached equilibrium for four-ring PAHs. Five to six ring PAHs were introduced into the water primarily through deposition. In this study, air and surface seawater samples collected from the Bohai (BS) and Yellow Seas (YS) in May 2012 were determined exchange of PAHs, especially of low-molecular-weight (LMW) PAHs (three-and four-ring PAHs) at the air-water interface. Net volatilization fluxes of LMW PAHs were 266e1454 ng/m 2 / d and decreased with distance from the coast, indicating that these PAHs transported from coastal runoff were potential contributors to the atmosphere in the BS and YS. Moreover, LMW PAHs were enriched in the dissolved phase compared with those in the particulate phase in the water column, possibly suggesting that the volatilized LMW PAHs were directly derived from wastewater discharge or petroleum pollution rather than released from contaminated sediments. The airesea exchange fluxes of the threering PAHs were 2-to 20-fold higher than their atmospheric deposition fluxes in the BS and YS. The input to and output from the water reached equilibrium for four-ring PAHs. Differently, five-and six-ring PAHs were introduced into the marine environment primarily through dry and wet deposition, indicating that the water column was still a sink of these PAHs from the surrounding atmosphere.

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A study of urban pollution and haze clouds over northern China during the dusty season based on satellite and surface observations

Cited by 89 publications

References 28 publications

Disentangling the Complex Effects of Socioeconomic, Climatic, and Urban Form Factors on Air Pollution: A Case Study of China

Disentangling the Complex Effects of Socioeconomic, Climatic, and Urban Form Factors on Air Pollution: A Case Study of China

Identification and quantification of shipping emissions in Bohai Rim, China

Exchange of polycyclic aromatic hydrocarbons across the air-water interface in the Bohai and Yellow Seas

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