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Urbanization, Energy, and Air Pollution in China The Challenges Ahead: Proceedings of a Symposium (2004) / Chapter Skim
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The Characteristics of Urban Air Pollution in China--XIAOYAN TANG
Pages 47-54

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From page 47...
... Thus, the drastic rise in the number of vehicles and rapid development of industries in cities has led to worsening air quality (Xie et al., 2000, 2003; Zhang et al., 1999) , particularly higher concentrations of nitrogen oxides (NOx)
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From page 48...
... This kind of air pollution has three distinguishing characteristics: (1) a high concentration of fine particles that adversely affect visibility; (2)
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From page 49...
... was higher than the national air quality standard in the United States (65 µg/m3)
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From page 50...
... Therefore, reducing the number and severity of ozone episodes and lowering the levels of atmospheric ozone have become major health concerns of city governments.
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From page 51...
... In recent years, field measurements of air pollutants with meteorological observations and model simulations of air quality on a regional scale have been conducted in these three regions. The results showed pollutants, particularly secondary pollutants such as fine particles and ozone, were distributed regionally under certain meteorological conditions (Municipal Area Project Report, 2002; Pearl River Delta Region Project Report, 2002)
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From page 52...
... . Neimenggu Zhangjiakou Chengde Beijing Tangshan Tianjin Langfang Sea Baoding Shanxi Hebei Shandong FIGURE 5 The simulation area, including Beijing municipality and surrounding areas, in the three-dimensional air quality model in three scales of nesting grids.
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From page 53...
... Source NOx VOC Total Region Contribution Contribution Contribution Beijing downtown 9.9% 14.7% 24.6% Southeast part of Beijing 5.6% 3.5% 9.1% Tianjin and vicinity 9.3% 23.8% 33.1% Southern part of Hebei Province 3.3% 7.9% 11.2% Source: Municipal Area Project Report, 2002. CONCLUSION Rapid economic growth combined with urbanization has caused severe air pollution problems in China, especially in urban areas.
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From page 54...
... 2002. Municipal Area Project Report: Strategic Study on Air Pollution Control in Beijing, 06/02.
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Key Terms

  • fine particles
  • pearl river
  • delta region
  • ozone concentration
  • urban air

  • pollution control
  • secondary pollutants
  • peking university
  • regional effects
  • acid rain

  • water air
  • soil pollution
  • project report
  • rapid economic
  • ozone formation

  • major cities
  • gaseous pollutants
  • region project
  • caused severe
  • meteorological conditions

  • ozone episode
  • ozone episodes
  • free radicals
  • primary pollutants
  • severe air

  • ozone peak
  • ozone concentrations
  • integrated control
  • ambient ozone
  • major health


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